Specifications

3-80 Reference Guide
Model No.
Running Head
WAN Card Redundancy System Configuration and Operation
Similary, a WAN card in slot W4 automatically becomes the redundant mate of the WAN card
in slot W3. This is known as 1x1 redundancy and a “Y-adapter” (Model 1239) is required to
bring the outputs of each pair of WAN ports onto the same facility. The “master” WAN card
and its redundant mate must be equipped with the smae mix of DSX, CSU or CEPT modules
and those must be placed in the same positions on both cards. If an imcompatible WAN card
is installed in a redundant slot, then the system will “reject” that card. If a Dual WAN is used
in “termiante” mode, only the failed WAN port will switch to its redundant mate. If the Dual
WAN card is programmed for “drop and insert” mode, both ports will switch even if only one
has failed.
Figure 3-64 shows a typical System Main Screen with redundant WAN cards. The redundant
card slot W4; backs up the WAN cards in slots W1, W2 and W3, respectively. During normal
system operation (no switch in progress), the Status of each T1 or E1 port on a WAN card is
“
a
” for an active WAN card, or “
r”
for a redundant card.
Figure 3-64. Typical RCON System with Redundant WAN Cards
Figure 3-65 shows the System Main Screen after the switch to the redundant WAN card is
completed on the selected port. In this case, a switch was made from port 1 of the WAN card
in slot W1 to port 1 of the redundant WAN card in slot W2. However, port 2 of the card in slot
W1 was not switched. Therefore, the Status of the two ports on slot W1 is
ra
(1 = redundant,
2 = active), and the Status of the two ports on slot W2 is
ar
(1 = active, 2 = redundant).
Node_1 | | 12-31-99 14:33
Slot Installed Status Slot Installed Status
C1 CPU RCON IF INTF+modem
C2 U1 ALR ssss
P1 U2 E&M 4Wx8-6 ssssssss
P2 U3 FXS 2Wx8-9 ssssssss
P3 U4 FXO 2Wx8-9 ssssssss
W1 DSX+DSX aa U5 HSU 366x2 ss
W2 CEPT+CEPT aa U6 OCU-DPx5 sssss
W3 CSU+CSU as U7 FRAD-10 ssssssss
W4 DSX+DSX rr U8 SRU 232x10 ssssssssss
F1 PS1 R1 RINGER
F2 PS2
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