Specifications

Reference Guide 3-79
System Configuration and Operation WAN Card Redundancy
Figure 3-63. Typical System with CPU Switchover Completed
3.22 WAN Card Redundancy
Both T1 and E1 WAN redundancy are supported in enhanced bus-connect systems (Model
8804 CPU RCON) and in cross-connect systems (Model 8801 CPU XCON). It is not
supported in the standard bus-connect systems (Model 8800 CPU BCON). WAN redundancy
switching can be caused by one of the following:
•
A software command issued by the operator
•
Removal of the active WAN card from the system
•
Failure of the active WAN port or card
•
CGA alarm declaration on the active WAN port or card
During a WAN redundancy switch, voice and data traffic are momentarily disrupted, and
transmission then recovers automatically.
3.22.1 Enhanced Bus-Connect WAN Redundancy
In enhanced bus-connect systems, a single or dual WAN card that is installed in slot W2
automatically becomes the redundant mate of the WAN card in slot W1. Similarly, a WAN
card in slot W4 automatically becomes the redundant mate of the WAN card in slot W1.
Node_1 | | 12-31-99 14:33
Slot Installed Status
C1 CPU RCON RDNT
C2 CPU XCON
P1/U1 ADPCM-64
P2/U2 ADPCM-64
P3/U3 E&M 2Wx8-6
P4/U4 FXS 2Wx8-9
W1/U5 FXO 2Wx8-9
W2/U6 CSU+CSU
W3/U7 CSU+CSU
W4/U8 CEPT+CEPT
IF INTF+modem
S1 PS1
S2 PS2
S3 Ringer
Alarms | Config | Del | accepT | Xcon | sYs | Logout | Oos | cpusWtch