Installation guide
A-43
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
See Table A-38 and Table A-39 for Wire Lists for adapter cables for the X.21 application. This adapter
cable is available in two models: one is used when the HDM/SDI card set operates as a DCE and the
other when the HDM/SDI operates as a DTE. It has a male DB-37 on the IGX end and a female DB-15
(DCE) or male DB-15 (DTE) on the user end.
20 RC DCE Receive common
21 Spare
28 BSY IS DTE Busy (in service)
32 SS SS DTE Select standby
33 SQ SQ DCE Signal quality detect
34 NS NS DTE New synchronization
36 SB SB DCE Standby indicator
37 SC DTE Send common
Table A-37 HDM EIA/TIA-449/422 Connector Pin Assignments (continued)
Pin No. IGX Name EIA Name Source Description
Table A-38 X.21 Adapter Cable Pin Assignments
DB-37 Pin No.
(SDI) IGX Name
DB-15 Pin No.
(User) Description
1 Drain 1 Frame ground
4 TxD-A 2 Transmit data from DTE
22 TxD-B 9 Transmit data from DTE
6 RxD-A 4 Receive data to DTE
24 RxD-B 11 Receive data to DTE
7 RTS-A 3 Request to send
25 RTS-B 10 Request to send
9 CTS-A 5 Clear to send
27 CTS-A 12 Clear to send
8 RxC-A 6 Receive clock
26 RxC-B 13 Receive clock
19 SG 8 Signal ground
Table A-39 X.21 Adapter Cable Pin Assignments
DB-37 Pin No.
(SDI) IGX Name
DB-15 Pin No.
(User) Description
1 Drain 1 Frame ground
4 TxD-A 2 Transmit data from DTE
22 TxD-B 9 Transmit data from DTE
6 RxD-A 4 Receive data to DTE