Specifications

6-54 Reference Guide
Model No.
Running Head
PARS Screen WAN Card
Figure 6-45. PARS Rerouting (two nodes)
Figure 6-45 shows detail of PARS mode for two nodes with the link between adjacent nodes
broken. Time slots have been rerouted and any User card terminated on the failed WAN has
been assigned to the WAN with the unbroken link. Note that on WAN card number 2 a User
card was terminated on the primary WAN (acutally split) and is rerouted to the secondary
WAN after the primary received an alarm. Data is transmitted around the ring in the “opposite”
direction in order to reach the destination node.
RX
W1-1
TX
W1-2 TX
RX
RX
W2-1
T
X
TX
W2-2
RX
HSU, FXS, E&M or SRU Ports
123
HSU, FXS, E&M or SRU Ports
123
TS1
T
S1