Installation guide

A-38
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
UFI HSSI Port Pin Assignments
The UFI-HSSI interface is native DCE. The interface pin assignment is done in such a way that the UFI
interface can be connected to the HSSI interface of a Cisco router, which is a native DTE, using a straight
pin-to-pin HSSI standard cable attached to a UFI back card or a Cisco router in either DTE or DCE
modes.
A UFI card in DCE mode can be connected to any DTE interface using the same standard Cisco cable.
When UFI is configured in DTE mode, it needs the HSSI-DTE cable to connect to a DCE interface. The
wiring details are shown in Table A-32 for cable number 72-1265-01.
Table A-31 UFI HSSI Connector Pinouts
Pin No. Name Source Direction Description
1/26 SG Both — Signal ground
2/27 RT DCE Output Receive timing
3/28 CA DCE Output DCE available
4/29 RD DCE Output Receive data
5/30 LC DTE Output DCE loop request
6/31 ST DCE Output Send timing
7/32 SG Both — Signal ground
8/33 TA DTE Input DTE available
9/34 TT DCE Input Terminal timing
10/35 LA DTE Input Loopback circuit A
11/36 SD DTE Input Send data
12/37 LB DTE Input Loopback circuit B
13/38 SG Both — Signal ground
14/39 DT DTE Input Send timing in DTE
15 to 18 — DCE Output Undefined: to DCE
19/44 SG Both — Signal ground
20 to 23 — DTE Input Undefined: from DCE
24/49 TM DTE Output Test mode
25/50 SG Both — Signal ground
Table A-32 Wiring Details for the HSSI-DTE Cable
Pin No. J1 to J2 Name Direction Description
1/26 to 1/26 SG — Signal ground
2/27 to 9/34 RT/TT Output Receive timing/terminal timing
3/28 to 8/33 CA/TA Output DCE available/DTE available
4/29 to 11/36 RD/SD Output Receive data/send data
5/30 to 10/35 LC/LA Output DCE loop request/loopback
circuit A