Installation guide

A-29
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
Cabling Summary
TTC JJ-20 (J1) Cabling
Table A-16 and Table A-17 describes the J1 cabling and the TTC connector pinouts, respectively.
Y1 Trunk Cabling
Table A-18 and Table A-19 describe the Y1 cable and the connector pin assignments, respectively.
Table A-16 J1 Cabling
Cable Parameter Description
Cable type 110-ohm, twisted pair for balanced; 2 cable pairs (1 transmit, 1 receive)
per TTC.
Cable connection Male DB-15 for balanced connection. See Table A-17 for pinouts.
Maximum cable
length
Maximum length depends on signal attenuation, which cannot exceed
13 dB.
Table A-17 TTC Connector Pinouts
Pin No. Description
2 Send tip S(T)
9 Send ring S(R)
4 Receive tip R(T)
11 Receive ring R(R)
1 Ground
Table A-18 Y1 Cabling
Cable Parameters Description
Cable Type 110 ohm twisted pair, balanced operation. Two cable pairs
(1 transmit, 1 receive) per Y1 line.
Cable Connection Male DB-15. See Table A-19 for pinouts.
Max. Cable Length Maximum cable length is determined by Vp-p (Voltage
peak-to-peak). The maximum permissible value is 1 Vp-p.
Table A-19 Y1 Connector Pinouts
Pin No. Description
2 Transmit tip T(A)
9 Transmit ring T(B)
4 Receive tip R(A)
11 Receive ring R(B)
1Shield