Installation guide

A-45
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
LDM EIA/TIA-232 Port Pin Assignments
Table A-41 lists the EIA/TIA-232 port pin assignments at the DB-15 connector on the LDM’s LDI back
card. The LDM card supports a limited subset of EIA control leads. The LDI always uses a DCE or DTE
DB-15-to-DB-25 adapter cable. Refer to Table A-42 and Table A-43 for wiring lists and the pin-outs for
the standard male DB-25 connector to the user data device.
Table A-41 LDM EIA/TIA-232 Connector Pin Assignments
Pin No. IGX Name EIA Name Source Description
1 Shield AA Both Frame ground
2 TxD BA DTE Transmit data from DTE
3 CTS CB DCE Clear to send
4 RxD BB DCE Received data to DTE
5 RTS CA DTE Request to send
6 XTC DB DCE Transmitter clock
7 RxC DD DCE Receiver clock
8 SG AB Both Signal ground
9 DSR CC DCE Data set ready
10 DTR CD DTE Data terminal ready
11 +VS Both +12V test voltage
12 –VS Both –12V test voltage
13 DCD CF DCE Data carrier detect (RLSD)
14 RL DTE Remote loop (for modem loopback)
15 MOD Mode select for cable (DTE or DCE)
Table A-42 LDM Adapter Cable Pin Assignments
DB-15 Pin No.
(LDI) IGX Name
DB-25 Pin No.
(User) Description
1 Frm. Gnd. 1 Frame ground
2 RxD 3 Received data to DTE
3 RTS 4 Request to send
4 TxD 2 Transmit data from DTE
5 CTS 5 Clear to send
6 XTC 24 External transmit clock
7 RxC 17 Receive clock
8 SG 7 Signal ground
9 DTR 20 Data terminal ready
10 DSR 6 Data set ready
11 +VS 9 +12V test voltage
1
12 –VS 10 –12V test voltage
1