Specifications

6-46 Reference Guide
Model No.
Running Head
PARS Screen WAN Card
4. Once a primary WAN is assigned to PARS mode, the secondary WAN will be assigned
to APRS by the system and will not be available to the user. Nothing can be terminated
on a secondary WAN after PARS MODE is selected.
5. Physcial connections are always made from the secondary WAN to the primary WAN
of the adjacent node.
6. User cards will be terminated normally on the primary WAN.
7. Upon termination on the primary WAN, user cards will actually be split so that they are
terminated on RX of aone WAN and TX of the other.
8. WAN will work as usual until CGA-RED or CGA-YELLOW is detected. The TX and
RX of empty time slots will be cross-connected to themselves. User cards will be
cross-connected to the WAN with the unbroken link and their split termination between
the two WANs will be removed.
6.4.2 Ring Network Traffic Flow
Figure 6-37 below, shows Ring Network Traffic Flow under normal conditions. The traffic
flow in the ring is as follows:
Note:
IAD is an example for any type of integrated access sytem used in the field
•
IAD 1 traffic to IAD 3 goes through IAD 2
•
IAD 1 traffic to IAD 4 goes through IAD 2, and IAD 3
•
IAD 1 traffic to IAD 5 goes through IAD 2, IAD3, and IAD 4
•
and so on for traffic flow from IAD 2, IAD 3, IAD 4, and IAD5