Zhone 3920Plus Bedienerhandbuch

COMSPHERE392xPLUS MODEMSMODELS 3920PLUSAND 3921PLUSTECHNICAL REFERENCE MANUALDocument No. 3920-A2-GH30-41February 2002

COMSPHERE 392xPlus Modemsvi October 1998 3920-A2-GH30-40Table PageB-1 Modem Health B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems5-24 October 1998 3920-A2-GH30-40Table 5-3(3 of 3)Dial Line Configuration Options — Multiport Mode lAsymmetric Rate: Disabled

Configure Branch5-253920-A2-GH30-40 October 1998Leased Line — Multiport Mode lThe Leased Line configuration options only appear when the Sync Leased f

COMSPHERE 392xPlus Modems5-26 October 1998 3920-A2-GH30-40Table 5-4(2 of 5)Leased Line Configuration Options — Multiport Mode lAutorate: EnableNxt Ena

Configure Branch5-273920-A2-GH30-40 October 1998Table 5-4(3 of 5)Leased Line Configuration Options — Multiport Mode l2 Sec LSD Hold: DisableNxt Dis

COMSPHERE 392xPlus Modems5-28 October 1998 3920-A2-GH30-40Table 5-4(4 of 5)Leased Line Configuration Options — Multiport Mode lAutoDialStandby: Disab

Configure Branch5-293920-A2-GH30-40 October 1998Table 5-4(5 of 5)Leased Line Configuration Options — Multiport Mode lTMp TxPre-Value: 5Nxt 0 1

COMSPHERE 392xPlus Modems5-30 October 1998 3920-A2-GH30-40Test — Multiport lThe Test configuration option determines the duration of a test.Table 5-5

Configure Branch5-313920-A2-GH30-40 October 1998Misc — Multiport lThe Miscellaneous configuration options determine specifics for various functions, i

COMSPHERE 392xPlus Modems5-32 October 1998 3920-A2-GH30-40Table 5-6(2 of 4)Miscellaneous Configuration Options — Multiport Mode lDir#1_Callback: Disa

Configure Branch5-333920-A2-GH30-40 October 1998Table 5-6(3 of 4)Miscellaneous Configuration Options — Multiport Mode lVF_Prompt_Type: 2nd_DialToneNxt

vii3920-A2-GH30-40 October 1998PrefaceObjectives and Reader AssumptionsThis manual describes how to install and operate the COMSPHERE Model 3920Plus s

COMSPHERE 392xPlus Modems5-34 October 1998 3920-A2-GH30-40Table 5-6(4 of 4)Miscellaneous Configuration Options — Multiport Mode lDiag Connection: Mod

Configure Branch5-353920-A2-GH30-40 October 1998Singleport Mode AIn Singleport mode, the modem’s configuration options are arranged into nine groups b

COMSPHERE 392xPlus Modems5-36 October 1998 3920-A2-GH30-40DTEInterfaceAsync/Sync ModeSync DTE RateAsync DTE RateAsyn #Data BitsAsyn Parity BitAsyn #St

Configure Branch5-373920-A2-GH30-40 October 1998DTE Interface — Singleport Mode AThe DTE Interface configuration options contain EIA-232-D (ITU-T V.24

COMSPHERE 392xPlus Modems5-38 October 1998 3920-A2-GH30-40Table 5-7(2 of 8)DTE Interface Configuration Options — Singleport Mode AAsync DTE Rate: 192

Configure Branch5-393920-A2-GH30-40 October 1998Table 5-7(3 of 8)DTE Interface Configuration Options — Singleport Mode AAsyn #Stop Bits: 1Nxt 1 2

COMSPHERE 392xPlus Modems5-40 October 1998 3920-A2-GH30-40Table 5-7(4 of 8)DTE Interface Configuration Options — Singleport Mode ADSR Control: Stndrd

Configure Branch5-413920-A2-GH30-40 October 1998Table 5-7(5 of 8)DTE Interface Configuration Options — Singleport Mode ACTS Control: Stndrd_RS232Nxt

COMSPHERE 392xPlus Modems5-42 October 1998 3920-A2-GH30-40Table 5-7(6 of 8)DTE Interface Configuration Options — Singleport Mode ALSD Control: Stndrd

Configure Branch5-433920-A2-GH30-40 October 1998Table 5-7(7 of 8)DTE Interface Configuration Options — Singleport Mode ABakup_TXClk_Src: InternalNxt

COMSPHERE 392xPlus Modemsviii October 1998 3920-A2-GH30-40Appendix C provides EIA-232-D and VF TELCO pin assignments.Appendix D provides V.25bis diali

COMSPHERE 392xPlus Modems5-44 October 1998 3920-A2-GH30-40Table 5-7(8 of 8)DTE Interface Configuration Options — Singleport Mode ADTE_Rate=VF: Disabl

Configure Branch5-453920-A2-GH30-40 October 1998DTE Dialer — Singleport Mode AThe DTE Dialer configuration options establish the DTE-to-modem protocol

COMSPHERE 392xPlus Modems5-46 October 1998 3920-A2-GH30-40Table 5-8(2 of 5)DTE Dialer Configuration Options — Singleport Mode AAT Escape Char: 043 AS

Configure Branch5-473920-A2-GH30-40 October 1998Table 5-8(3 of 5)DTE Dialer Configuration Options — Singleport Mode ALinefeed Char: 010Nxt "

COMSPHERE 392xPlus Modems5-48 October 1998 3920-A2-GH30-40Table 5-8(4 of 5)DTE Dialer Configuration Options — Singleport Mode AResultCode Form: Words

Configure Branch5-493920-A2-GH30-40 October 1998Table 5-8(5 of 5)DTE Dialer Configuration Options — Singleport Mode AV25b NewLineChr: CR+LFEnd CR+L

COMSPHERE 392xPlus Modems5-50 October 1998 3920-A2-GH30-40Table 5-9(2 of 4)Line Dialer Configuration Options — Singleport Mode ADialTone Detect: Enab

Configure Branch5-513920-A2-GH30-40 October 1998Table 5-9(3 of 4)Line Dialer Configuration Options — Singleport Mode AFast Disconnect: DisableNxt D

COMSPHERE 392xPlus Modems5-52 October 1998 3920-A2-GH30-40Table 5-9(4 of 4)Line Dialer Configuration Options — Singleport Mode ANo Data Disc: Disable

Configure Branch5-533920-A2-GH30-40 October 1998Dial Line — Singleport Mode AThe Dial Line configuration options are used to configure the modem for o

1-13920-A2-GH30-40 October 1998IntroductionOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems5-54 October 1998 3920-A2-GH30-40Table 5-10(2 of 4)Dial Line Configuration Options — Singleport Mode AAutomode: EnableNxt

Configure Branch5-553920-A2-GH30-40 October 1998Table 5-10(3 of 4)Dial Line Configuration Options — Singleport Mode AV22b Guard Tone: DisableNxt Di

COMSPHERE 392xPlus Modems5-56 October 1998 3920-A2-GH30-40Table 5-10(4 of 4)Dial Line Configuration Options — Singleport Mode AV.34 Precoder: DisableN

Configure Branch5-573920-A2-GH30-40 October 1998Leased Line — Singleport Mode AThe Leased Line configuration options only appear when the Sync Leased

COMSPHERE 392xPlus Modems5-58 October 1998 3920-A2-GH30-40Table 5-11(2 of 7)Leased Line Configuration Options — Singleport Mode ALeasedLine Rate: 336

Configure Branch5-593920-A2-GH30-40 October 1998Table 5-11(3 of 7)Leased Line Configuration Options — Singleport Mode AGain Hit Thresh: 010 ASCINxt &q

COMSPHERE 392xPlus Modems5-60 October 1998 3920-A2-GH30-40Table 5-11(4 of 7)Leased Line Configuration Options — Singleport Mode A2W SQ Retrain: Disabl

Configure Branch5-613920-A2-GH30-40 October 1998Table 5-11(5 of 7)Leased Line Configuration Options — Singleport Mode AAutoDialStandby: DisableNxt

COMSPHERE 392xPlus Modems5-62 October 1998 3920-A2-GH30-40Table 5-11(6 of 7)Leased Line Configuration Options — Singleport Mode AV29 TrainOnData: Dis

Configure Branch5-633920-A2-GH30-40 October 1998Table 5-11(7 of 7)Leased Line Configuration Options — Singleport Mode ADual_Leased_Ln: DisableEnd D

COMSPHERE 392xPlus Modems1-2 October 1998 3920-A2-GH30-40COMSPHERE 392xPlus ModelsThe COMSPHERE 392xPlus modem is available in the following models:•

COMSPHERE 392xPlus Modems5-64 October 1998 3920-A2-GH30-40V.42/MNP/Buffer — Singleport Mode AV.42/MNP/Buffer configuration options determine the type

Configure Branch5-653920-A2-GH30-40 October 1998Table 5-12(2 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode AErr Contrl Mode: V.42/MNPor

COMSPHERE 392xPlus Modems5-66 October 1998 3920-A2-GH30-40Table 5-12(3 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode AEC Fallbck Char:

Configure Branch5-673920-A2-GH30-40 October 1998Table 5-12(4 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode AXON/XOFF Psthru: DisableNx

COMSPHERE 392xPlus Modems5-68 October 1998 3920-A2-GH30-40Table 5-12(5 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode ASend Break Cntl:

Configure Branch5-693920-A2-GH30-40 October 1998Table 5-12(6 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode ASDC Idle Fill: Flag_FillNxt

COMSPHERE 392xPlus Modems5-70 October 1998 3920-A2-GH30-40Table 5-12(7 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode ASync Flow Cntrl:

Configure Branch5-713920-A2-GH30-40 October 1998Table 5-12(8 of 8)V.42/MNP/Buffer Configuration Options — Singleport Mode ARdcdAsyncBufSiz: DisableEnd

COMSPHERE 392xPlus Modems5-72 October 1998 3920-A2-GH30-40Table 5-13(2 of 2)Test Configuration Options — Singleport Mode ATest Timeout: DisableNxt

Configure Branch5-733920-A2-GH30-40 October 1998Misc — Singleport Mode AThe Miscellaneous configuration options determine specifics for various functi

Chapter Title1-33920-A2-GH30-40 October 1998 Model 3920Plus Standalone Multiport ModemThe Model 3920Plus multiport is a standalone modem (Figure 1-2),

COMSPHERE 392xPlus Modems5-74 October 1998 3920-A2-GH30-40Table 5-14(2 of 5)Miscellaneous Configuration Options — Singleport Mode AAccess frm Remt: E

Configure Branch5-753920-A2-GH30-40 October 1998Table 5-14(3 of 5)Miscellaneous Configuration Options — Singleport Mode ASpecialSecurity: DisableNxt D

COMSPHERE 392xPlus Modems5-76 October 1998 3920-A2-GH30-40Table 5-14(4 of 5)Miscellaneous Configuration Options — Singleport Mode ANMS_Call_Msgs: Cal

Configure Branch5-773920-A2-GH30-40 October 1998Table 5-14(5 of 5)Miscellaneous Configuration Options — Singleport Mode ADiag Connection: Modem(DC)Nx

COMSPHERE 392xPlus Modems5-78 October 1998 3920-A2-GH30-40Security — Singleport Mode AThe Security configuration options allow you to set the paramete

6-13920-A2-GH30-40 October 1998Poll List BranchPoll List Branch 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems6-2 October 1998 3920-A2-GH30-40To access PList from the Top-Level menu, make the following selections:F1Leased:33.6PList Con

Poll List Branch6-33920-A2-GH30-40 October 1998If there are modems in the poll list when you select Display,xxx Displays the network management addres

COMSPHERE 392xPlus Modems6-4 October 1998 3920-A2-GH30-40Change allows you to add modems to the Active poll list (Active), delete modems from bothActi

Poll List Branch6-53920-A2-GH30-40 October 1998AddThe Add function does not appear in Remote mode or on control modems.Add allows you to add the tribu

COMSPHERE 392xPlus Modems1-4 October 1998 3920-A2-GH30-40 Model 3921Plus Singleport Carrier-Mounted ModemThe Model 3921Plus singleport is a carrier-mo

COMSPHERE 392xPlus Modems6-6 October 1998 3920-A2-GH30-40Press the key until Acquire appears. Select Acquire.NOTEIf an error message (OtherTestAct

7-13920-A2-GH30-40 October 1998Control BranchControl Branch 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems7-2 October 1998 3920-A2-GH30-40To access Control from the Top-Level menu, make the following selections:F1Leased:33.6Control

Control Branch7-33920-A2-GH30-40 October 1998ResetReset causes the modem to stop operation and perform a complete program restart. The modem begins th

COMSPHERE 392xPlus Modems7-4 October 1998 3920-A2-GH30-40Now go to the next screen (Data Stream).F1Data StreamPort1 DisableF2F3The port field (for ex

Control Branch7-53920-A2-GH30-40 October 1998To enable or disable the modem’s data transmitter function on all ports, press the appropriatefunction ke

COMSPHERE 392xPlus Modems7-6 October 1998 3920-A2-GH30-40The port field (xxxxx) displays the currently selected interface. Valid interface selections

Control Branch7-73920-A2-GH30-40 October 1998To remove the modem from Make Busy mode, press the key once and the key untilRemoveMakeBusy appea

COMSPHERE 392xPlus Modems7-8 October 1998 3920-A2-GH30-40Press F1 (Service_Line) to switch the modem from its normal dial line to the service line.F1S

Control Branch7-93920-A2-GH30-40 October 1998Selecting Clone RemoteNOTEClone Remote operations are not supported unless both local andremote modems ar

Introduction1-53920-A2-GH30-40 October 1998 Model 3921Plus Multiport Carrier-Mounted ModemThe Model 3921Plus multiport is a carrier-mounted modem (Fig

COMSPHERE 392xPlus Modems7-10 October 1998 3920-A2-GH30-40Clone Remote in Broadcast ConfigurationsA tributary modem configured for extended diagnostic

Control Branch7-113920-A2-GH30-40 October 1998Viewing DC Broadcast Clone ResultsF1Choose DLL Type >DC_CloneResultsF2F3From the Choose DLL Type scre

COMSPHERE 392xPlus Modems7-12 October 1998 3920-A2-GH30-40• For Multiple download configurations, ensure that:— the tributaries are responding properl

Control Branch7-133920-A2-GH30-40 October 1998Cloning a Multiple TMp RemoteF1Choose DLL Type >Single MultipleF2F3Press the F3 key to select Multipl

COMSPHERE 392xPlus Modems7-14 October 1998 3920-A2-GH30-40Implementing a Clone Remote OperationWARNINGThe modem begins a transfer of its own program t

Control Branch7-153920-A2-GH30-40 October 1998If unsuccessful, the modem remains in the Download Transfer mode. The LCD’s top linedisplays RemClone Fa

COMSPHERE 392xPlus Modems7-16 October 1998 3920-A2-GH30-40Automatic Firmware DownloadNew releases may be available for the 392xPlus modem. The latest

Control Branch7-173920-A2-GH30-40 October 1998VF Thresholds UpdateThe VF Thresholds Update function allows you to set the thresholds that determine th

COMSPHERE 392xPlus Modems7-18 October 1998 3920-A2-GH30-40NOTENote that a warning ( ) appears on the second line of the screenif you enter an inva

Control Branch7-193920-A2-GH30-40 October 1998If the edited VF thresholds are valid, the Save command stores them into nonvolatile memory.When the Sav

COMSPHERE 392xPlus Modems1-6 October 1998 3920-A2-GH30-40392xPlus Operational ModesThe 392xPlus operational modes determine how your modem performs in

COMSPHERE 392xPlus Modems7-20 October 1998 3920-A2-GH30-40Table 7-1Valid Ranges for VF ThresholdsVF ThresholdsValid Ranges Default ValuesReceive Signa

8-13920-A2-GH30-40 October 1998Test BranchTest Branch 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems8-2 October 1998 3920-A2-GH30-40NOTEWhat Test branch selections are available depends on yourmodem’s configuration. See the d

Test Branch8-33920-A2-GH30-40 October 1998SelfSelf performs an internal self-test of the modem, which takes less than a minute to complete.The modem m

COMSPHERE 392xPlus Modems8-4 October 1998 3920-A2-GH30-40Loc Analog LoopLoc Analog Loop performs a local analog loopback (ITU-T V.54 Loop 3), Figure 8

Test Branch8-53920-A2-GH30-40 October 1998NOTEThe test delays 15 to 30 seconds to allow any outstanding networkmanagement messages to propagate before

COMSPHERE 392xPlus Modems8-6 October 1998 3920-A2-GH30-40To access Rem_Digital_Loop from the Test branch, make the following selections:F1Test:Rem_Dig

Test Branch8-73920-A2-GH30-40 October 1998Loc Digital LoopLoc Digital Loop is issued by a local modem and forces it to loopback any data received from

COMSPHERE 392xPlus Modems8-8 October 1998 3920-A2-GH30-40This screen does not appear in Singleport mode.F1Test:P1:Dig LoopStartedF2F3The message Start

Test Branch8-93920-A2-GH30-40 October 1998Figure 8-5. Pattern Test and Digital Loopback TestFigure 8-6. End-to-End Pattern TestTo access Pattern from

Introduction1-73920-A2-GH30-40 October 1998392xPlus Modem FeaturesThe 392xPlus modems share a wide variety of features.• Asynchronous DTE rates of 115

COMSPHERE 392xPlus Modems8-10 October 1998 3920-A2-GH30-40Select the appropriate port by pressing the corresponding F key. Press the key to scroll

9-13920-A2-GH30-40 October 1998Sub-Network Health and Status BranchSub-Network Health and Status Branch 9-1. . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems9-2 October 1998 3920-A2-GH30-40Press the key until SubHS appears. Select SubHS.NOTEIf there are no modems in the poll li

10-13920-A2-GH30-40 October 1998Call Setup Branch Call Setup Branch 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems10-2 October 1998 3920-A2-GH30-40Call_Setup“Status”Status Configure PList Control TestSubHSTlk/Data Security RemoteDialDiscon

Call Setup Branch10-33920-A2-GH30-40 October 1998Select Dial to display the first directory telephone number.F1DialDirectory:Nxt 01:5551234F2F3To vi

COMSPHERE 392xPlus Modems10-4 October 1998 3920-A2-GH30-40DisconnectFor dial backup applications, use this function when you want to disconnect an est

Call Setup Branch10-53920-A2-GH30-40 October 1998AnswerFor dial backup applications, Answer allows the modem to go off-hook, generate an answer tone,a

COMSPHERE 392xPlus Modems10-6 October 1998 3920-A2-GH30-40Under normal backup conditions, when a problem occurs on the primary leased line, the modems

Call Setup Branch10-73920-A2-GH30-40 October 1998If the modem is operating in a Dial Backup mode, the Dial Standby function forces the modemto primary

COMSPHERE 392xPlus ModemsA February 2002 3920-A2-GH30-41COMSPHERE392xPlus ModemsModels 3920Plus and 3921PlusTechnical Reference Manual3920-A2-GH30-416

COMSPHERE 392xPlus Modems1-8 October 1998 3920-A2-GH30-40ApplicationsMultipoint Multipoint is available in all 392xPlus modem models. It utilizes leas

COMSPHERE 392xPlus Modems10-8 October 1998 3920-A2-GH30-40Entering Telephone Numbers and Dial Command Modifiers into Directory LocationsThe following

Call Setup Branch10-93920-A2-GH30-40 October 1998Table 10-1Valid Dial Command ModifiersDial command modifiers are parameters entered in the dial comma

COMSPHERE 392xPlus Modems10-10 October 1998 3920-A2-GH30-40Directory Status (may not appear for certain countries)Directory Status displays the status

11-13920-A2-GH30-40 October 1998Talk/Data Branch Talk/Data Branch 11-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems11-2 October 1998 3920-A2-GH30-40Manual Dialing When the Remote Modem is Configured for Auto-AnswerNOTEOn the remote modem, t

Talk/Data Branch11-33920-A2-GH30-40 October 1998Manual Dialing When the Remote Modem is Configured for Manual AnswerNOTEOn both modems, the Line Curre

COMSPHERE 392xPlus Modems11-4 October 1998 3920-A2-GH30-40

12-13920-A2-GH30-40 October 1998Dial Access Security Overview 12-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems12-2 October 1998 3920-A2-GH30-40The COMSPHERE 392xPlus modems use an outbound and inbound method of security knownrespective

Dial Access Security12-33920-A2-GH30-40 October 1998VF-Side PasswordsVF-side password entry occurs between modems prior to connecting. Once the VF-sid

Introduction1-93920-A2-GH30-40 October 1998When the Digital Bridging feature is enabled, a new menu is present with the following conditions:• TDM cap

COMSPHERE 392xPlus Modems12-4 October 1998 3920-A2-GH30-40DTE-Side PasswordsDTE-side password entry requires the originating user to supply a valid pa

Dial Access Security12-53920-A2-GH30-40 October 1998Security BranchThe Security branch of the Top-Level menu allows you to change and save parameters

COMSPHERE 392xPlus Modems12-6 October 1998 3920-A2-GH30-40Set Access CtrlSet Access Control allows you to configure critical parameters contained with

Dial Access Security12-73920-A2-GH30-40 October 1998Press the key to scroll the Set Answer Security, Set Originate Security, and Set Administrativ

COMSPHERE 392xPlus Modems12-8 October 1998 3920-A2-GH30-40F1Select IndexEnt "0001F2F3Select Index appears.Press the F2 ( " ) key to increme

Dial Access Security12-93920-A2-GH30-40 October 1998Table 12-1 describes the settings of the Edit Table Password group options.Table 12-1Edit Password

COMSPHERE 392xPlus Modems12-10 October 1998 3920-A2-GH30-40Set Answer SecSet Answer Security determines if dial access security is enabled or disabled

Dial Access Security12-113920-A2-GH30-40 October 1998Set Orig SecSet Originate Security controls whether or not the modem can originate a call using A

COMSPHERE 392xPlus Modems12-12 October 1998 3920-A2-GH30-40Set Admin PsWdSet Administrative Password is used to change the Administrative Password val

Dial Access Security12-133920-A2-GH30-40 October 1998Reset SecurityReset Security is the second major function within the Security branch of the Top-L

COMSPHERE 392xPlus Modems1-10 October 1998 3920-A2-GH30-40NOTEWhen a 2400 V.34 modulation connection occurs on one end of amodem pair with configurati

COMSPHERE 392xPlus Modems12-14 October 1998 3920-A2-GH30-40This concludes the description of the functions found in the Security branch of the Top-Lev

Dial Access Security12-153920-A2-GH30-40 October 1998Table 12-4(2 of 3)Security Configuration OptionsDTE_PW_TermChar: 013Nxt " 013This configur

COMSPHERE 392xPlus Modems12-16 October 1998 3920-A2-GH30-40Table 12-4(3 of 3)Security Configuration OptionsOriginate_Secur: No_OrigSecEnd No_OrigSec

Dial Access Security12-173920-A2-GH30-40 October 1998NOTEWhile pulse dial can be used to originate the call, DTMF tones mustbe used for the password.

COMSPHERE 392xPlus Modems12-18 October 1998 3920-A2-GH30-40Database Table ExamplesThe following examples illustrate possible database tables in which

Dial Access Security12-193920-A2-GH30-40 October 1998Table 12-7 is an example of a security database table that uses a mixture of VF and DTEpasswords.

COMSPHERE 392xPlus Modems12-20 October 1998 3920-A2-GH30-40This page intentionally left blank.

Dial Access Security12-213920-A2-GH30-40 October 1998NOTEThis page is self-supporting and can be removed for securityreasons.00282600The following pro

COMSPHERE 392xPlus Modems12-22 October 1998 3920-A2-GH30-40

13-13920-A2-GH30-40 October 1998Remote Branch Remote Branch 13-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction1-113920-A2-GH30-40 October 19984. The ringer equivalence (REN) is used to determine the quantity of devices which may beconnected to the

COMSPHERE 392xPlus Modems13-2 October 1998 3920-A2-GH30-40The following conditions must be met before using the Remote branch:• A connection using eit

Remote Branch13-33920-A2-GH30-40 October 1998For Trellis Multipoint (TMp) control modems, you must specify the network managementaddress of a tributar

COMSPHERE 392xPlus Modems13-4 October 1998 3920-A2-GH30-40displays and press any function key. Primary channel operation is not available wheninitiati

14-13920-A2-GH30-40 October 1998AT Command Set and S-Registers Overview 14-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems14-2 October 1998 3920-A2-GH30-40Escape Sequence and Escape Guard TimeThe escape sequence is only issued when the modem is on

AT Command Set and S-Registers14-33920-A2-GH30-40 October 1998Result CodesTable 14-1 lists all valid result codes for the 392xPlus modems.Table 14-1(1

COMSPHERE 392xPlus Modems14-4 October 1998 3920-A2-GH30-40Table 14-1(2 of 3)Result CodesNumbers(1)DescriptionWordNumbers(2)22 12 CONNECT 9600/ EC** Co

AT Command Set and S-Registers14-53920-A2-GH30-40 October 1998Table 14-1(3 of 3)Result CodesNumbers(1)DescriptionWordNumbers(2)42 42 CONNECT 33600* Co

COMSPHERE 392xPlus Modems14-6 October 1998 3920-A2-GH30-40Table 14-2(1 of 10)392xPlus AT CommandsATCommandDescriptionDCP LCDCommandSequenceA/ Repeat L

AT Command Set and S-Registers14-73920-A2-GH30-40 October 1998Table 14-2(2 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescriptionDS=n Di

COMSPHERE 392xPlus Modems1-12 October 1998 3920-A2-GH30-40CanadaNOTICE TO USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORKThe Canadian Departme

COMSPHERE 392xPlus Modems14-8 October 1998 3920-A2-GH30-40Table 14-2(3 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescriptionXn Extended

AT Command Set and S-Registers14-93920-A2-GH30-40 October 1998Table 14-2(4 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription&Cn

COMSPHERE 392xPlus Modems14-10 October 1998 3920-A2-GH30-40Table 14-2(5 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription&Gn V.

AT Command Set and S-Registers14-113920-A2-GH30-40 October 1998Table 14-2(6 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription&M

COMSPHERE 392xPlus Modems14-12 October 1998 3920-A2-GH30-40Table 14-2(7 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription&Tn Te

AT Command Set and S-Registers14-133920-A2-GH30-40 October 1998Table 14-2(8 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription&Z

COMSPHERE 392xPlus Modems14-14 October 1998 3920-A2-GH30-40Table 14-2(9 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription\Nn Asynch

AT Command Set and S-Registers14-153920-A2-GH30-40 October 1998Table 14-2(10 of 10)392xPlus AT CommandsATCommandDCP LCDCommandSequenceDescription#Qn S

COMSPHERE 392xPlus Modems14-16 October 1998 3920-A2-GH30-40S-Register ListS-Registers affect the operating parameters of the 392xPlus modems. S-Regist

AT Command Set and S-Registers14-173920-A2-GH30-40 October 1998Table 14-3(1 of 15)392xPlus S-RegistersS-RegisterDescriptionDCP LCDCommandSequenceS0 Au

Introduction1-133920-A2-GH30-40 October 1998Technical SpecificationsTable 1-2 shows the technical specifications for the 392xPlus modems.Table 1-2(1 o

COMSPHERE 392xPlus Modems14-18 October 1998 3920-A2-GH30-40Table 14-3(2 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS12 Escap

AT Command Set and S-Registers14-193920-A2-GH30-40 October 1998Table 14-3(3 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS23 P

COMSPHERE 392xPlus Modems14-20 October 1998 3920-A2-GH30-40Table 14-3(4 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS28 Port4

AT Command Set and S-Registers14-213920-A2-GH30-40 October 1998Table 14-3(5 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS33 M

COMSPHERE 392xPlus Modems14-22 October 1998 3920-A2-GH30-40Table 14-3(6 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS41 Dial

AT Command Set and S-Registers14-233920-A2-GH30-40 October 1998Table 14-3(7 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS44 L

COMSPHERE 392xPlus Modems14-24 October 1998 3920-A2-GH30-40Table 14-3(8 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS46 Autom

AT Command Set and S-Registers14-253920-A2-GH30-40 October 1998Table 14-3(9 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS52 D

COMSPHERE 392xPlus Modems14-26 October 1998 3920-A2-GH30-40Table 14-3(10 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS61 CT11

AT Command Set and S-Registers14-273920-A2-GH30-40 October 1998Table 14-3(11 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS66

COMSPHERE 392xPlus Modems1-14 October 1998 3920-A2-GH30-40Table 1-2(2 of 2)Technical Specifications for 392xPlus ModemsSpecifications DescriptionTRANS

COMSPHERE 392xPlus Modems14-28 October 1998 3920-A2-GH30-40Table 14-3(12 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS74 Netw

AT Command Set and S-Registers14-293920-A2-GH30-40 October 1998Table 14-3(13 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS84

COMSPHERE 392xPlus Modems14-30 October 1998 3920-A2-GH30-40Table 14-3(14 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS90 DTE

AT Command Set and S-Registers14-313920-A2-GH30-40 October 1998Table 14-3(15 of 15)392xPlus S-RegistersS-RegisterDCP LCDCommandSequenceDescriptionS96

COMSPHERE 392xPlus Modems14-32 October 1998 3920-A2-GH30-40

A-13920-A2-GH30-40 October 1998Menu TreeOverview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsA-2 October 1998 3920-A2-GH30-40Status Configure PListUNIX_Dial(Tributaryonly)Sync_LeasedAsync_LeasedChoose ModeAnswerOrigina

Menu TreeA-33920-A2-GH30-40 October 1998Control Test SubHS Call_Setup Tlk/Data Security RemoteDoes not appear in TMp Controlmode.Does not appear in Re

COMSPHERE 392xPlus ModemsA-4 October 1998 3920-A2-GH30-40

B-13920-A2-GH30-40 October 1998TroubleshootingOverview B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13920-A2-GH30-41 February 2002Modem InstallationOverview 2-1. . . . . . . . . . . .

COMSPHERE 392xPlus ModemsB-2 October 1998 3920-A2-GH30-40Table B-2Leased-Line OperationSymptom ActionThe modems do not train-up onleased lines.Verify

TroubleshootingB-33920-A2-GH30-40 October 1998Table B-4Modem — DTE ConnectionSymptom ActionThe modem does not accept or echoback AT commands.Verify th

COMSPHERE 392xPlus ModemsB-4 October 1998 3920-A2-GH30-40Table B-5(1 of 2)Modem — VF ConnectionSymptomActionThe modem does not receive a dialtone.Atta

TroubleshootingB-53920-A2-GH30-40 October 1998Table B-5(2 of 2)Modem — VF ConnectionSymptom ActionIntermittent disconnects, high errorrates, or excess

COMSPHERE 392xPlus ModemsB-6 October 1998 3920-A2-GH30-40Table B-8MUX OperationSymptom ActionThe MUX configuration option doesnot appear under DTE Int

C-13920-A2-GH30-40 October 1998Pin AssignmentsOverview C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsC-2 October 1998 3920-A2-GH30-40EIA-232-D Pin AssignmentsTable C-1 lists the EIA-232-D pin assignments for the modem.Table C-

Pin AssignmentsC-33920-A2-GH30-40 October 1998VF Connector Pin AssignmentsTable C-2 lists the connector pin assignments for Model 3920Plus modular jac

COMSPHERE 392xPlus ModemsC-4 October 1998 3920-A2-GH30-40Auxiliary Cables Not SuppliedTo add an external telephone to your modem, use an external “Y”

Pin AssignmentsC-53920-A2-GH30-40 October 1998For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-positioncrossover

COMSPHERE 392xPlus Modems2-2 October 1998 3920-A2-GH30-40For the carrier-mounted models• Installation instructions• Model 3921Plus modem• One (singlep

COMSPHERE 392xPlus ModemsC-6 October 1998 3920-A2-GH30-40To connect a Model 3920Plus port to another modem’s EIA-232-D interface, use a 25-pincrossove

D-13920-A2-GH30-40 October 1998ITU-T V.25bis Dialing Commandand ResponsesOverview D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsD-2 October 1998 3920-A2-GH30-40Call Request CommandsCall Request commands are issued from the DTE to the modem and are respo

ITU-T V.25bis Dialing Command and ResponsesD-33920-A2-GH30-40 October 1998NS is similar to the Common Operational Message Invalid Number and the resul

COMSPHERE 392xPlus ModemsD-4 October 1998 3920-A2-GH30-40Connect Incoming Call (CIC)The CIC command forces the modem to cancel any DIC commands and an

ITU-T V.25bis Dialing Command and ResponsesD-53920-A2-GH30-40 October 1998Request List of Stored Numbers (RLN)The Request List of Stored Numbers (RLN)

COMSPHERE 392xPlus ModemsD-6 October 1998 3920-A2-GH30-40Command ResponseA Command Response indicates that the command entered was a valid or invalid

ITU-T V.25bis Dialing Command and ResponsesD-73920-A2-GH30-40 October 1998Table D-1(2 of 2)V.25bis CommandsV.25bis CommandAT Command/S-Register Equiva

COMSPHERE 392xPlus ModemsD-8 October 1998 3920-A2-GH30-40

E-13920-A2-GH30-40 October 1998ASCII Character TableOverview E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modem Installation2-33920-A2-GH30-40 October 1998Model 3920Plus Modem InstallationBefore installing your standalone modem, make sure your installation

COMSPHERE 392xPlus ModemsE-2 October 1998 3920-A2-GH30-40Table E-1(2 of 4)ASCII CharactersHexadecimalASCII ValueKeyControlCharacterDecimalASCII Value1

ASCII Character TableE-33920-A2-GH30-40 October 1998Table E-1(3 of 4)ASCII CharactersHexadecimalASCII ValueKeyControlCharacterDecimalASCII Value3E 062

COMSPHERE 392xPlus ModemsE-4 October 1998 3920-A2-GH30-40Table E-1(4 of 4)ASCII CharactersHexadecimalASCII ValueKeyControlCharacterDecimalASCII Value6

F-13920-A2-GH30-40 October 1998Default Configuration OptionsOverview F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsF-2 October 1998 3920-A2-GH30-40Table F-1(1 of 10)Factory Default Configuration Options ConfigurationOptionSync LeasedDefault

Default Configuration OptionsF-33920-A2-GH30-40 October 1998Table F-1(2 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaul

COMSPHERE 392xPlus ModemsF-4 October 1998 3920-A2-GH30-40Table F-1(3 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaultSe

Default Configuration OptionsF-53920-A2-GH30-40 October 1998Table F-1(4 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaul

COMSPHERE 392xPlus ModemsF-6 October 1998 3920-A2-GH30-40Table F-1(5 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaultSe

Default Configuration OptionsF-73920-A2-GH30-40 October 1998Table F-1(6 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaul

Safety InstructionsB3920-A2-GH30-40 October 1998Important Safety Instructions1. Read and follow all warning notices and instructions marked on the pro

COMSPHERE 392xPlus Modems2-4 October 1998 3920-A2-GH30-4098-14677-03DATATERMINALEQUIPMENTDB-25-PCONNECTORSUB-MINIATURE4-POSITIONPLUG FORNETWORKMANAGEM

COMSPHERE 392xPlus ModemsF-8 October 1998 3920-A2-GH30-40Table F-1(7 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaultSe

Default Configuration OptionsF-93920-A2-GH30-40 October 1998Table F-1(8 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaul

COMSPHERE 392xPlus ModemsF-10 October 1998 3920-A2-GH30-40Table F-1(9 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefaultS

Default Configuration OptionsF-113920-A2-GH30-40 October 1998Table F-1(10 of 10)Factory Default Configuration Options ConfigurationOptionSync DialDefa

COMSPHERE 392xPlus ModemsF-12 October 1998 3920-A2-GH30-40

G-13920-A2-GH30-40 October 1998Sample ConfigurationsOverview G-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsG-2 October 1998 3920-A2-GH30-40Point-to-PointFigure G-1 shows a sample configuration for point-to-point applications.Cable 1

Sample ConfigurationsG-33920-A2-GH30-40 October 1998Sample Port Rate TablePortRatePort 1 Port 2 Port 3 Port 428.8K 9600 9600 4800 480024.0K 9600 Disab

COMSPHERE 392xPlus ModemsG-4 October 1998 3920-A2-GH30-40Extended Point-to-PointFigure G-2 shows a sample configuration for extended point-to-point ap

Sample ConfigurationsG-53920-A2-GH30-40 October 19983910 A Use Sync Leased (Answer) default configuration options with the followingexceptions:Tx Cloc

Modem Installation2-53920-A2-GH30-40 October 1998DTE 2 DTE 3 DTE 4DTE 1LEASED DIAL NMS PWR ON OFF!DB-25-S CONNECTORS8-POSITION,8-CONDUCTORPLUG8-POSITI

COMSPHERE 392xPlus ModemsG-6 October 1998 3920-A2-GH30-40Extended MultipointFigure G-3 shows a sample configuration for extended multipoint applicatio

Sample ConfigurationsG-73920-A2-GH30-40 October 1998Configuration Options3920Plus A Use Sync Leased (Answer) default configuration options with the fo

COMSPHERE 392xPlus ModemsG-8 October 1998 3920-A2-GH30-40CablesCable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug)co

Sample ConfigurationsG-93920-A2-GH30-40 October 1998Configuration Options3920Plus A Use Sync Leased (Answer) default configuration options with the fo

COMSPHERE 392xPlus ModemsG-10 October 1998 3920-A2-GH30-40Point-to-Point with Network ManagementFigure G-5 shows a sample configuration for point-to-p

Sample ConfigurationsG-113920-A2-GH30-40 October 1998Sample Port Rate TablePortRatePort 1 Port 2 Port 3 Port 428.8K 9600 9600 4800 480024.0K 9600 Disa

COMSPHERE 392xPlus ModemsG-12 October 1998 3920-A2-GH30-40Carrier with Network ManagementFigure G-6 shows a sample configuration for COMSPHERE 3000 Se

Sample ConfigurationsG-133920-A2-GH30-40 October 1998Configuration Options3921Plus A Use Sync Leased (Answer) default configuration options with the f

COMSPHERE 392xPlus ModemsG-14 October 1998 3920-A2-GH30-40Extended DiagnosticsFigure G-7 shows a sample configuration for extended diagnostics.Figure

Sample ConfigurationsG-153920-A2-GH30-40 October 19983920Plus C Use Sync Leased (Answer) default configuration options with the followingexceptions:Tx

COMSPHERE 392xPlus Modems2-6 October 1998 3920-A2-GH30-40Data Terminal Equipment ConnectionUse the following steps to connect an EIA-232-D cable from

COMSPHERE 392xPlus ModemsG-16 October 1998 3920-A2-GH30-40Digital BridgingFigure G-8 shows a sample for Digital Bridging.Cntrl3920Plus A1234Backup3920

Sample ConfigurationsG-173920-A2-GH30-40 October 19983920Plus E, GUse TMp Tributary template default configuration options with the followingexception

COMSPHERE 392xPlus ModemsG-18 October 1998 3920-A2-GH30-40Point-to-Point MSDFigure G-9 shows a sample configuration for point-to-point MSD.3920Plus A3

Sample ConfigurationsG-193920-A2-GH30-40 October 1998Sample Port Rate Table: Point-to-Point MSD 3920Plus APortRatePort 1 Port 2 Port 3 Port 428.8K 192

COMSPHERE 392xPlus ModemsG-20 October 1998 3920-A2-GH30-40Multipoint MSDFigure G-10 shows a sample configuration for multipoint MSD.3920Plus A*1234392

Sample ConfigurationsG-213920-A2-GH30-40 October 1998CablesCable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug)connec

COMSPHERE 392xPlus ModemsG-22 October 1998 3920-A2-GH30-40

H-13920-A2-GH30-40 October 1998Synchronous Data CompressionOverview H-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus ModemsH-2 October 1998 3920-A2-GH30-40SYNCHRONOUSDTEINTERCHANGECIRCUITSFUNCTIONDATACOMPRESSIONFUNCTIONERRORCORRECTIONFUNCTIONSIGNAL

Synchronous Data CompressionH-33920-A2-GH30-40 October 1998DTE and DCE FramesData exchanged between the local and remote DCEs is according to the LAPM

Modem Installation2-73920-A2-GH30-40 October 1998Leased-Line Network ConnectionUse the following steps to connect the leased-line network interface:1.

COMSPHERE 392xPlus ModemsH-4 October 1998 3920-A2-GH30-40Data SynchronizationData exchanged between the synchronous DTE and the modem is synchronized

Synchronous Data CompressionH-53920-A2-GH30-40 October 1998Flow Control MethodThe data transmitted from the DTE is sent to the DCE at a rate determine

COMSPHERE 392xPlus ModemsH-6 October 1998 3920-A2-GH30-40Tuning SDC EfficiencySDC efficiency is dependent on the configuration parameters of the DTE a

Synchronous Data CompressionH-73920-A2-GH30-40 October 1998SDC NegotiationThe use of the synchronous data compression function and the value of the as

COMSPHERE 392xPlus ModemsH-8 October 1998 3920-A2-GH30-40

I-13920-A2-GH30-40 October 1998Equipment ListEquipmentFeature/Part NumberModel 3920Plus 3920-A1-XXX3920-A2-XXXModel 3921Plus 3921-B1-XXX6-position, 4-

COMSPHERE 392xPlus ModemsI-2 October 1998 3920-A2-GH30-40

Glossary-13920-A2-GH30-40 October 1998GlossaryActive (Operating) A configuration area containing configuration options currently in use by the modem.A

COMSPHERE 392xPlus ModemsGlossary-2 October 1998 3920-A2-GH30-40automatic dial backup When leased-line operation fails, this function forces the modem

GlossaryGlossary-33920-A2-GH30-40 October 1998character echo A way to check the accuracy of data transmission by sending to the monitor (displaying)al

COMSPHERE 392xPlus Modems2-8 October 1998 3920-A2-GH30-40Removing and Replacing the Model 3920Plus ModemTo remove and replace the Model 3920Plus modem

COMSPHERE 392xPlus ModemsGlossary-4 October 1998 3920-A2-GH30-40Data mode A state where any entries made from the DTE are considered data and are tran

GlossaryGlossary-53920-A2-GH30-40 October 1998directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location c

COMSPHERE 392xPlus ModemsGlossary-6 October 1998 3920-A2-GH30-40function key Any one of three keys on the DCP that allows you to select or increment a

GlossaryGlossary-73920-A2-GH30-40 October 1998MNP This protocol (Microcom Networking Protocol) detects and corrects data errors causedby telephone lin

COMSPHERE 392xPlus ModemsGlossary-8 October 1998 3920-A2-GH30-40phase jitter A rapid or repeated shifting of the relative phase of a signal resulting

GlossaryGlossary-93920-A2-GH30-40 October 1998SDU Shared Diagnostic Unit. A circuit card that plugs into a dedicated slot in theCOMSPHERE 3000 Series

COMSPHERE 392xPlus ModemsGlossary-10 October 1998 3920-A2-GH30-40V.22 A ITU–T standard for modems operating full-duplex over dial networks at 1200 bps

Index-13920-A2-GH30-40 October 1998IndexNumbers2W Leased Line SQ Retrain, 5-27, 5-60S-Register, 14-28AAbort (test), 8-2ac power requirements, 1-13Acce

COMSPHERE 392xPlus ModemsIndex-2 October 1998 3920-A2-GH30-40Bell103J, 5-53212A, 5-53Bisync, 5-45, D-1Blind Dial PauseMultiport mode, 5-20S-Register,

IndexIndex-33920-A2-GH30-40 October 1998dialaccess security. See Securityanswering a callauto-answer, 5-19, 5-49, 11-2manual answer, 5-19, 5-49, 10-5,

Modem Installation2-93920-A2-GH30-40 October 1998MULTIPORTBACKCONNECTOR PLATES495-14696-01V.35 (3600/3500)RS366A/V.25 (3800) EIA232/V.24DTE B DTE

COMSPHERE 392xPlus ModemsIndex-4 October 1998 3920-A2-GH30-40Ffaceplate, 1-4, 1-5, 3-2factory default configurations, 2-13, 5-2, F-2–F-7loading, 14-9F

IndexIndex-53920-A2-GH30-40 October 1998loopbacklocal analog, 8-4–8-5local digital, 8-7–8-8remote digital, 8-5–8-6loudness of speaker, 5-31, 5-73, 7-2

COMSPHERE 392xPlus ModemsIndex-6 October 1998 3920-A2-GH30-40Ppart numbers, 4-8passwordsadministrative, 12-6–12-7remote access, 5-4–5-9, 5-31, 5-74, 1

IndexIndex-73920-A2-GH30-40 October 1998Securityaccess messages, 3-13–3-14branch, 3-9, 12-5–12-14configuration options, 12-14–12-16database tables, 12

COMSPHERE 392xPlus ModemsIndex-8 October 1998 3920-A2-GH30-40Tone Dial, 14-7top-level menu messages, 3-10Train TimeMultiport mode, 5-23Singleport mode

COMSPHERE 392xPlus Modems2-10 October 1998 3920-A2-GH30-403000 SERIESCARRIERMODEL 3921PlusMULTIPORTMODEMLATCHCIRCUIT CARDGUIDES495-14708SDUMODEL 3921P

Modem Installation2-113920-A2-GH30-40 October 1998If the Model 3921Plus modem is to communicate with an installed SDCP, install the modem asdescribed

COMSPHERE 392xPlus Modems2-12 October 1998 3920-A2-GH30-406. When the modem is installed properly and the power-up self-test completes, rotate thecirc

Modem Installation2-133920-A2-GH30-40 October 1998Removing the Model 3921Plus ModemCAUTIONWhen removing the Model 3921Plus modem from the carrier,alwa

COMSPHERE 392xPlus ModemsC October 1998 3920-A2-GH30-40NoticesTHIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL

COMSPHERE 392xPlus Modems2-14 October 1998 3920-A2-GH30-40configuration, then you must change the factory setting using either the modem’s DCP (asdesc

3-13920-A2-GH30-40 October 1998DCP OperationOverview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems3-2 October 1998 3920-A2-GH30-40Model 3920Plus Diagnostic Control PanelThe diagnostic control panel (DCP) of the Model 3920Pl

DCP Operation3-33920-A2-GH30-40 October 1998TXDRXDRTSCTSDSRDTRLSDPwrAlrmTestDialRIBusyServSQStatusFront PanelSpkr1421251031041051061071081091324Port39

COMSPHERE 392xPlus Modems3-4 October 1998 3920-A2-GH30-40Table 3-1(1 of 2)392xPlus DCP LEDsLabelColor IndicatesPwr green Power has been applied to the

DCP Operation3-53920-A2-GH30-40 October 1998Table 3-1(2 of 2)392xPlus DCP LEDsLabel IndicatesColorPort* 1,2,3,4(3921Plusmultiport only)green ON – The

COMSPHERE 392xPlus Modems3-6 October 1998 3920-A2-GH30-40Diagnostic Control Panel OperationThe 392xPlus modem’s diagnostic control panel (DCP) is the

DCP Operation3-73920-A2-GH30-40 October 1998Other IndicatorsOther indicators may turn on depending on existing conditions, such as error detection,inf

COMSPHERE 392xPlus Modems3-8 October 1998 3920-A2-GH30-40F1 F2 F3 KeysFunction keys F1, F2, and F3 select the LCD choice that appears above the fun

DCP Operation3-93920-A2-GH30-40 October 1998The menu tree contains the following branches:Quick Config — Used to display the basic operational charact

i3920-A2-GH30-40 October 1998Table of ContentsPrefaceObjectives and Reader Assumptions vii. . . . . . . . . . . . . . . . . . . . . . . . . How to Use

COMSPHERE 392xPlus Modems3-10 October 1998 3920-A2-GH30-40Top-Level Menu Status and Operational MessagesAccess to all menu tree branches from the DCP

DCP Operation3-113920-A2-GH30-40 October 1998Table 3-3(2 of 3)Top-Level Menu StatusStatus IndicatesMessageCall Failure Busy Signal The answering modem

COMSPHERE 392xPlus Modems3-12 October 1998 3920-A2-GH30-40Table 3-3(3 of 3)Top-Level Menu StatusStatus IndicatesMessageCall Disconnect ATH Disconnect

DCP Operation3-133920-A2-GH30-40 October 1998Messages listed in Table 3-4 are common operational messages that occur during modemoperation. These mess

COMSPHERE 392xPlus Modems3-14 October 1998 3920-A2-GH30-40Quick Configuration DisplayThe Quick Configuration display indicates the basic operational c

DCP Operation3-153920-A2-GH30-40 October 1998The following provides information about the Quick Configuration LCD display.a Displays the network posit

COMSPHERE 392xPlus Modems3-16 October 1998 3920-A2-GH30-40This page intentionally left blank.

DCP Operation3-173920-A2-GH30-40 October 1998Diagnostic Control Panel AccessNOTEThis page of the manual is self supporting and can be removed topreven

COMSPHERE 392xPlus Modems3-18 October 1998 3920-A2-GH30-40

4-13920-A2-GH30-40 October 1998Status BranchStatus Branch 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modemsii October 1998 3920-A2-GH30-404. Status BranchStatus Branch 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems4-2 October 1998 3920-A2-GH30-40ConfigurePList Control Test SubHS Call_Setup Tlk/Data Security RemoteStatusDeviceHS VF Identi

Status Branch4-33920-A2-GH30-40 October 1998Device Health and Status (DeviceHS)DeviceHS provides a ‘‘snapshot” of current modem alarms which are activ

COMSPHERE 392xPlus Modems4-4 October 1998 3920-A2-GH30-40Table 4-1(2 of 3)Health and Status MessagesType IndicatesMessageStatus Subtree Truncate Downs

Status Branch4-53920-A2-GH30-40 October 1998Table 4-1(3 of 3)Health and Status MessagesType IndicatesMessageSecurity Database Reset The security datab

COMSPHERE 392xPlus Modems4-6 October 1998 3920-A2-GH30-40Displaying VF ConditionsF1Status:VFDisplay ClearF2F3To display VF conditions, select Dis

Status Branch4-73920-A2-GH30-40 October 1998EchoFreqOff Echo Frequency Offset displays the frequency offset of the far end echo. Thisparameter appears

COMSPHERE 392xPlus Modems4-8 October 1998 3920-A2-GH30-40F1VF Counter ClearCommand CompleteF2F3The message Command Complete appears on the LCD’s botto

Status Branch4-93920-A2-GH30-40 October 1998To exit the Identity function and remain in the Status branch, press the key. To exit andreturn to the

COMSPHERE 392xPlus Modems4-10 October 1998 3920-A2-GH30-40SDCWhen running synchronous data compression, the SDC function displays information about th

Status Branch4-113920-A2-GH30-40 October 1998Table 4-2SDC Performance MeasurementsGroupDTE Rate Compression Ratio Line EfficiencyTx The number of bits

Table of Contentsiii3920-A2-GH30-40 October 199814. AT Command Set and S-RegistersOverview 14-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems4-12 October 1998 3920-A2-GH30-40If the modem is receiving a signal, the signal quality appears on the second LCD line. Press

Status Branch4-133920-A2-GH30-40 October 1998BackupThe Status Backup function displays the configuration of the modem’s current operating linefacility

COMSPHERE 392xPlus Modems4-14 October 1998 3920-A2-GH30-40Table 4-3Backup Status Screens Active Line1st Screen DisplayInactive Line2nd Screen DisplayP

Status Branch4-153920-A2-GH30-40 October 1998OptionsThe Options Status function displays all optional firmware features currently installed in themode

COMSPHERE 392xPlus Modems4-16 October 1998 3920-A2-GH30-40RecordRecord is a troubleshooting tool used in conjunction with support personnel. This func

Status Branch4-173920-A2-GH30-40 October 1998Service LogService Log is a troubleshooting tool used in conjunction with support personnel. Use thisfunc

COMSPHERE 392xPlus Modems4-18 October 1998 3920-A2-GH30-40

5-13920-A2-GH30-40 October 1998Configure BranchOverview 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems5-2 October 1998 3920-A2-GH30-40• Factory is a read-only (unchangeable) configuration area containing six sets of predefinedc

Configure Branch5-33920-A2-GH30-40 October 1998Configure BranchThe Configure branch of the Top-Level menu contains all of the modem’s configuration op

COMSPHERE 392xPlus Modemsiv October 1998 3920-A2-GH30-40List of FiguresFigure Page1-1 3920-A2 Standalone Modem 1-2. . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems5-4 October 1998 3920-A2-GH30-40The Configure branch consists of the following three levels:• Ld EditArea frm. Allows the sel

Configure Branch5-53920-A2-GH30-40 October 1998F1Ld Fact Preset: >Sync_LeasedF2F3Select Sync_Leased.F1Choose Mode:Answer OriginateF2F3Select Answer

COMSPHERE 392xPlus Modems5-6 October 1998 3920-A2-GH30-40F1StrapsWhenDisc >Nxt No_ChangeF2F3F1RemAccssPasswrd:Nxt "00000000F2F3Select Nxt un

Configure Branch5-73920-A2-GH30-40 October 1998To save the new password to a configuration area, make the following selections:F1RemAccssPasswrd:Nxt

COMSPHERE 392xPlus Modems5-8 October 1998 3920-A2-GH30-40Configuration TablesEach modem operates in either the Multiport or Singleport mode depending

Configure Branch5-93920-A2-GH30-40 October 1998DTEInterfaceDTEDialerLineDialerAutoAnswerRing#Dialer TypeDialTone DetectBlind Dial PausBusyTone Detect&

COMSPHERE 392xPlus Modems5-10 October 1998 3920-A2-GH30-40DTE Interface — Multiport Mode lThe DTE Interface configuration options contain EIA-232-D (I

Configure Branch5-113920-A2-GH30-40 October 1998Table 5-1(2 of 9)DTE Interface Configuration Options — Multiport Mode lPort4 Ext Alarm: DisableNxt Dis

COMSPHERE 392xPlus Modems5-12 October 1998 3920-A2-GH30-40Table 5-1(3 of 9)DTE Interface Configuration Options — Multiport Mode lMSD Port Control: Ho

Configure Branch5-133920-A2-GH30-40 October 1998Table 5-1(4 of 9)DTE Interface Configuration Options — Multiport Mode lRate at 14.4 KNxt Disable 1

Table of Contentsv3920-A2-GH30-40 October 1998List of TablesTable Page1-1 392xPlus Operational Modes 1-6. . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 392xPlus Modems5-14 October 1998 3920-A2-GH30-40Table 5-1(5 of 9)DTE Interface Configuration Options — Multiport Mode lAsyn #Data Bits: 8Nx

Configure Branch5-153920-A2-GH30-40 October 1998Table 5-1(6 of 9)DTE Interface Configuration Options — Multiport Mode lDSR Control: Stndrd_RS232Nxt

COMSPHERE 392xPlus Modems5-16 October 1998 3920-A2-GH30-40Table 5-1(7 of 9)DTE Interface Configuration Options — Multiport Mode lCTS Control: Stndrd_

Configure Branch5-173920-A2-GH30-40 October 1998Table 5-1(8 of 9)DTE Interface Configuration Options — Multiport Mode lXTXC Clamps TXC: EnableNxt E

COMSPHERE 392xPlus Modems5-18 October 1998 3920-A2-GH30-40Table 5-1(9 of 9)DTE Interface Configuration Options — Multiport Mode lPort TXC Source: Int

Configure Branch5-193920-A2-GH30-40 October 1998Line Dialer — Multiport Mode lThe Line Dialer configuration options establish parameters used by the m

COMSPHERE 392xPlus Modems5-20 October 1998 3920-A2-GH30-40Table 5-2(2 of 3)Line Dialer Configuration Options — Multiport Mode lBlind Dial Paus: 2secN

Configure Branch5-213920-A2-GH30-40 October 1998Table 5-2(3 of 3)Line Dialer Configuration Options — Multiport Mode lLong Space Disc: EnableNxt Ena

COMSPHERE 392xPlus Modems5-22 October 1998 3920-A2-GH30-40Dial Line — Multiport Mode lThe Dial Line configuration options are used to configure the mo

Configure Branch5-233920-A2-GH30-40 October 1998Table 5-3(2 of 3)Dial Line Configuration Options — Multiport Mode lDial Tx Level: Permissv(–9)Nxt P