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A-13000-A2-GA31-80 December 1994
COMSPHERE Interface
Connections
Overview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
Two 50-pin connectors on the backplane provide an
interface between the carrier and the digital/lease network,
and one or two optional 50-pin network interface modules
provide the interface to the dial network or the switched
56 kbps digital network.
Figure A-1 is a diagram of the 50-pin digital or analog
leased-line network interface connector. Figure A-2 shows
the 50-pin modular plug conversion cable used for digital
and leased-line networks. Figure A-3 illustrates the
connectors on the COMSPHERE 3000 Series Carrier
backplane.
Table A-1 provides the digital or analog leasedline
network interface connector pin assignments. Table A-2
provides the permissive dial network interface module
(NIM) pin assignments that are used for dial and 2-wire
switched 56 kbps applications, while Table A-3 provides
the programmable NIM pin assignments. Table A-4
provides the pin assignments for the 4-wire Switched 56
NIM. Tables A-5 and A-6 provide the pin assignments
from the NMS and Shared Diagnostic Control Panel
(SDCP). Tables A-7 through A-10 list the pin assignments
for all 50-pin to modular plug conversion cables. Table
A-11 provides descriptions of the connectors on the
carrier’s backplane. Table A-12 provides the D-lead
control interface pin assignments.
The COMSPHERE 3811/3911 D-lead control interface
is used in modem-pooling applications to cause the
modem to go off-hook in the Originate mode. This
interface is provided on connector J1 for Slots 1 through 8
and connector J2 for Slots 9 through 16. Table A-12 lists
the D-lead control interface pin assignments.
Pin assignments vary from one product to another. For
information on a specific cable or connector, see the
appropriate Installation and Operation Manual or
Applications Guide for the product.
Figure A-1. 50-Pin Cable Connector
A