ADC Kentrox ISDN NT1 1010 Spezifikationen Seite 386

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7-74
Reference Guide
Model No.
Running Head
PARS Screen WAN Card
7.5.8 Line Protection - Link Failure
When WAN links fail, the ring will break. The integrated access device will stop delivering
traffic to the broken links and will reroute the traffic through the ring and loop them before the
broken lines.
Figure 7-51. PARS Normal Operation Mode (two nodes)
Figure 7-51 shows details of PARS mode for two nodes. Primary WANs are cross-connected
to secondary. User cards appear to be terminated normally on the primary WAN. They are
actually split between RX of the primary and TX of the secondary, as shown. Note that the
physical connections between nodes are shown from the secondary WAN of one node to the
primary WAN of the adjacent node.
W2-2
W2-1W1-1
W1-2
TX
RX
RX
TX
RX
TX
TX
RX
HSU, FXS, FXO, E&M or SRU
1 2 3 4
HSU, FXS, FXO
,
E&M or SRU
1 2 3 4
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