Zhone 3920Plus Bedienerhandbuch Seite 17

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 354
  • Inhaltsverzeichnis
  • FEHLERBEHEBUNG
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 16
Introduction
1-53920-A2-GH30-40 October 1998
Model 3921Plus Multiport Carrier-Mounted Modem
The Model 3921Plus multiport is a carrier-mounted modem (Figure 1-4) equipped with an integral
time division multiplexer (TDM) with a modem sharing device (MSD). The modem installs into
the COMSPHERE 3000 Series Carrier, occupying two slots. The modems faceplate covers two
slots in the carrier. It has twenty (20) LED status indicators for displaying modem activity and an
audio speaker jack for the carriers optional speaker.
The modems back panel has four edge card connectors that mount into two connector plates. Each
connector plate has two DB-25-S connectors providing four EIA-232-DTE interfaces.
Both the singleport and multiport Model 3921Plus modems derive ac power from the
COMSPHERE 3000 Series Carriers backplane, which is a common bus to all devices installed in
the carrier. The user interface to any Model 3921Plus modem is through the shared diagnostic
control panel (SDCP), an optional feature which operates in a manner similar to the DCP on the
Model 3920Plus modems. For a better understanding of DCP operation, refer to Chapter 3,
DCP Operation.
49614423a-03
FACEPLATE
EDGE CARD
CONNECTORS
PORT
3
PORT
4
PORT
1
PORT
2
3921Plus
TXD
RXD
RTS
CTS
DSR
DTR
LSD
Pwr
Alrm
Test
Dial
RI
Busy
Serv
SQ
Status
Front Panel
Spkr
142
125
103
104
105
106
107
108
109
13
24
Port
BACK
CONNECTOR
PLATES
DTE B DTE A
DTE B DTE A
Figure 1-4. Model 3921Plus Multiport Modem
Seitenansicht 16
1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 353 354

Kommentare zu diesen Handbüchern

Keine Kommentare