Avaya Nortel Communication Server 1000 Reference page 64

Overview
Figure 13: Network connections to IPE modules
A card LAN link bus is common to all of the line/trunk card slots within an IPE module (or IPE
section of a CE module). This bus is arranged in a master/slave configuration where the
controller card is the master and all other cards are slaves. The module backplane provides
each line/trunk card slot with a unique hardwired slot address. This slot address enables a
slave card to respond when addressed by the controller card. The controller card
communicates with only one slave at a time.
In normal operation, the controller card continually scans (polls) all of the slave cards
connected to the card LAN to monitor their presence and operational status. The slave card
sends replies to the controller on the input bus along with its card slot address for identification.
In this reply, the slave informs the controller if any change in card status is taken place. The
controller can then prompt the slave for specific information. Slaves only respond when
prompted by the controller; they do not initiate exchange of control or status data on their
own.
64 Circuit Card Reference
Comments? infodev@avaya.com
July 2011