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C-2
Cisco Catalyst 4000 Access Gateway Module Installation and Configuration Note
OL-3008-01
Appendix C Connector and Cable Specifications
8-Port RJ21 FXS Module Connector Pinouts
8-Port RJ21 FXS Module Connector Pinouts
Table C-3 lists the port and pin numbers on the RJ-21 pinout for the 8-port FXS module connector.
Table C-2 Management Port Pinouts — RJ-45
Pin Signal Direction Description
1 RXD+ input Receive data diff
1
pair
1. Differential. There exists a positive and negative copy of the signal with a set
impedance.
2 RXD- input Receive data diff pair
3 TXD+ output Transmit data diff pair
4 Ground Unused pair
5 Ground Unused pair
6 TXD- output Transmit data diff pair
7 Unused pair
8 Unused pair
Table C-3 RJ-21 Pinout for the 8-Port RJ21 FXS Module Connector
Port Number Connector Pin Number Signal
00
25
Ring
Tip
11
26
Ring
Tip
22
27
Ring
Tip
33
28
Ring
Tip
44
29
Ring
Tip
55
30
Ring
Tip
66
31
Ring
Tip
77
32
Ring
Tip
8 - 15 8 - 15
33 - 40
Not Used
16 - 24 16 - 24
41 - 49
GND
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