Telenetics Sunrise Series Modular Nest - Manual (Page 22)

Part No. TEL–09949, Rev A
June 2001
Pre-Installation Information and Activities Page 22 of 34
Setting Control Across Groups
You can use cables to daisy-chain NC ports on 326X Series Modem cards, as you can
with stand-alone modems. With 9- and 21-card backplanes, you can also set NMS
Bus DIP switches on the backplane so that all NC signaling is bussed to one NC Port.
To bus two or more groups’ NC signaling to one NC Port using Bus DIP switches:
• Groups must be contiguous (Group 3 to Group 2 to Group 1)
• The NC port you plan to use must be the lowest-numbered NC port, and it
must have its Bus Master slot occupied
• The NMS Bus DIP switch between groups whose signals are to be bussed to a
common NC port must have all six positions set to the low number (if all six
positions are set to the high number, daisy-chaining is disabled)
Caution
Do not mix switch settings to high and low numbers. This causes interference with
Network Control signaling.
Example
For example, to bus signals from group 2 to group 1’s NC port:
1) Ensure that Bus 1 Master slot is occupied. Other slots in groups 1
and 2 need not be (because the backplane uses a “multi-drop bus,”
successful bussing of NC signaling along the backplane takes place
even when slots are unoccupied).
2) On the backplane, locate the NMS Bus DIP switch between Bus 1
Master slot and Bus 2 Master slot (Figure 11). Set all six NMS Bus
DIP switches to 1.
3) Connect the network management cable (supplied with your
network manager) from the Bus 1 Master slot NC IN port to the
network manager.
Figure 11 illustrates this example.