Installation manual

Pin Assignments
A-73000-A2-GA31-F0 March 2001
Carrier Backplane Connectors
The center connectors are P19 and P20. These
connectors supply low ac or dc voltage from the power
supply unit to the COMSPHERE 3000 Series Carrier’s
backplane.
Table A-12 provides descriptions of the connectors on
the right and left side of the carrier’s backplane.
Figure A-4 illustrates the connectors on the
COMSPHERE 3000 Series Carrier backplane.
Table A-12
Connectors on the COMSPHERE 3000 Series Carrier Backplane
Connectors
for Slots 1–8
Connectors
for Slots 9–16
Function
P21 P22 This 50-pin connector provides the digital or 4-wire and 2-wire leased-line interface
for DCEs (DSUs and dial/lease modems).
P23 & P24 P25 & P26 These connectors are used by the Network Interface Modules (NIMs) to provide the
dial interface through a 50-pin connector for dial/lease modems.
J1 J2 This 26-pin high-density D-type connector provides the D-lead control interface for
dial/lease modems. (Refer to Table A-13 for pin assignments).
P26 P25 P24 P23
P20 P19
J2 P22 J1 P21
496-13861-03
Figure A-4. Connectors on the COMSPHERE 3000 Series Carrier Backplane