Telenetics Sunrise Series Modular Nest - Manual (Page 18)

Part No. TEL–09949, Rev A
June 2001
Pre-Installation Information and Activities 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.