Installation guide

A-46
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
Note Two adapter cables are available for the LDI card. The choice of cable determines whether the LDI card
functions as a DCE or as a DTE. These can be ordered from Cisco Systems or made by the customer.
Make sure that the correct cable is used for the type of user device connected.
13 DCD 8 Data carrier detect (RLSD)
14 RL 21 Remote loop output
15 MOD n.c. Connects internally to DB-15-8
(3) LL 18 Local loop output
2
1. You can use one of these pins to force a control pin to stay high or low.
2. No LDI local loop output is available. Try using DTR output: DB-15-9.
Table A-43 LDM Adapter Cable Pin Assignments
DB-15 Pin No.
(LDI) IGX Name
DB-25 Pin
No. (User) Description
1 Shield 1 Frame ground
2 TxD 2 Transmit data from DTE
3 CTS 5 Clear to send
4 RxD 3 Receive data to DTE
5 RTS 4 Request to send
6 RxC 17 Receive clock, connects to
DB-25-15
1
1. Pins 15 and 17 connect through a jumper.
7 XTC 24 External transmit clock
8 SG 7 Signal ground
9 DSR 6 Data set ready
10 DTR 20 Data terminal ready
11 +VS 9 +12V test voltage
2
2. You can use one of these pins to force a control pin to stay high or low.
12 –VS 10 –12V test voltage
3
13 Not
connected
Not
connected
Not used
14 DCD 8 Data carrier detect (RLSD)
15 MOD n.c. Mode select, no connection for
DCE cable
Not connected
2
TxC 15 Transmit clock, connects to
DB-25-17
2
Table A-42 LDM Adapter Cable Pin Assignments (continued)
DB-15 Pin No.
(LDI) IGX Name
DB-25 Pin No.
(User) Description