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Redundancy “Y” Cable
BPX Switch Cabling Summary B-7
Table B-18 Standard Cables Available from Cisco
Redundancy “Y” Cable
The redundancy cables are a special “Y” cable available from Cisco. They are required for redundant
trunk and data interfaces. Table B-19 lists the Y-cables used with various BPX switch back cards.
Table B-19 Redundancy Y-Cables
Model# Description Usage
T3-E3-10
T3-E3-25
T3-E3-50
T3-E3-75
T3-E3-xx
75 coax/BNC-BNC, 10'
75 coax/BNC-BNC, 25'
75 coax/BNC-BNC, 50'
75 coax/BNC-BNC, 75'
length to be specified
T3 or E3 trunk interface
5620 RS-232/M25-F25 Control port to control terminal, StrataView, or ext. window
device
5621 RS-232/M25-M25 special Control or Aux. port to modem
5623 RS-232/M25-M25 Aux. port to ext. window device
5601 Ground cable DC
5670 Molex-pigtail DC
5671 Spade lug-pigtail DC
Y - Cable Used On Cisco P/N
T3 trunkLM-3T3TBS
E3 trunkLM-3E3TBS
Aux./Cont. ports LM-BCC TBS
Ext. Clk. In LM-BCC TBS
Ext. Clk. Out LM-BCC TBS