Installation guide

A-27
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
T1 Cabling
Trunk cables connect the customer DSX-1 crossconnect point or T1-E1 channel service unit (CSU) to
the IGX node at the BC-T1 or BC-E1 back card. Refer to Table A-10 for details. For information on T1
connector pin assignments, see Table A-11.
E1 Cabling
E1 trunk cables connect the customer DSX-1 crossconnect point or E1 channel service unit (CSU) to the
node at the back card. For cabling specifications, see Table A-12. For E1 connector pin assignments, see
Table A-13.
Note that variations exist in the pin assignments for some interfaces: Table A-14 and Table A-15 show
the D-connector pinouts for the CVM, NTM, UFM, UVM, and FRM.
Table A-10 T-1 Cabling
Cable Parameter Description
Cable Type Western Electric 22 AWG, ABAM individually shielded twisted
pair. Two pair per T1 line (1 transmit and 1 receive).
Cable Connector Male DB-15 subminiature. See Table A-11 for pinouts. The
connector pinouts are the same for both the BA-T1 and the MT3
Distribution Panel.
Maximum Cable Length 533 ft (162 m) maximum between the node and the first repeater
or CSU.
Table A-11 T1 Connector Pin Assignments
Pin No. Description
1 Transmit, tip
2 Transmit pair shield
3 Receive, tip
4 Receive pair shield
9 Transmit, ring
11 Receive, ring