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Cisco Confidential
7
Ports 24 – 47
Ports 46 & 47
connected to PSTN
FXO Bypass failover
ports
Ports 0 – 23
Ports 0 – 3 support
long loop length
Ports 48 – 71
• SM-D-72-FXS
72 port FXS Double Wide Service Module
Loop length – 3,300 ft with 26 AWG
First 4 ports will support OPX-Lite long loop length
11,000 ft with 26 AWG
18,000 ft with 24 AWG
2 PSTN FXO Bypass Failover Ports
Port 46
FXO Bypass Port 0
Port 47
FXO Bypass Port 1
OUT
FXO Port
IN
PSTN
Standard RJ21 Connectors
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