Model 3911 - Paradyne COMSPHERE 3910 Installation And Operation Manual

COMSPHERE 3900 Series Modems
Model 3911's faceplate has 16 LED status indicators for displaying modem activity and an audio
speaker jack for the carrier's optional speaker.
The Model 3911 modem's rear has two edge card connectors that mount into a connector plate
located on the rear of the carrier. This connector plate has two DB-25-S connectors, one providing
an EIA-232-D DTE interface and one for future functionality.
FACEPLATE
Status
Pwr
Alrm
142
Test
Dial
125 RI
Busy
Serv
SQ
103
TXD
104 RXD
105
RTS
106 CTS
107 DSR
108
DTR
109 LSD
Front Panel
Spkr
3911
The Model 3911 derives ac power from the COMSPHERE 3000 Series Carrier's backplane, which
is a common bus to all devices installed in the carrier. The user interface to any Model 3911 is
through the shared diagnostic control panel (SDCP), an optional feature which operates in a
1-4
EIA232/V.24
EDGE CARD
CONNECTOR
FUTURE
USE
Figure 1-2. Model 3911
November 1996
BACK
CONNECTOR
PLATE
EIA232/V.24
CONNECTOR
GROUNDING
TAB
FUTURE
USE
496-14178b
3910-A2-GN32-30