| Part No. |
| June 2001 |
Page 18 of 34 |
326X Series Modem—Cabling to a Network Manager
This section describes how to set the 326X Series Modem backplane NMS Bus DIP switches for network management. It also describes the proper sequence for connecting to a Network Management System (NMS).
When cabling 326X Series Modem enclosure cards to a network manager:
•The network control (NC) master is a modem that receives network management polls and responds over the digital NC interface. NC polls are generated by the manager and passed to the local or remote site. NC responses are generated:
-By the modems at the local site and passed to the manager site
-By the modems at the remote site and passed to the manager site
•The NC slave is a modem that receives NC polls and responds over the audio interface (dial or leased line).
•When you divide an enclosure into groups, each group represents a single NC channel. The enclosure can operate with some slots empty, but at least one card must be in the “master slot” of each group to allow NC signaling for other slots in that group. The master slot corresponds to the NC IN/NC OUT connectors.
The network manager regards all 326X Series Modems included in a group and their associated slaves as operating on a single NC channel. For proper network management operation on a single NC channel, each modem and its associated slaves must have a unique NC address. The total number of 326Xs on one NC channel must not exceed the maximum number of devices per channel supported by the network manager. See your NMS documentation for details.