Nortel Networks 553-3001-211 manual Overview Page 63

Overview Page 63 of 894

The switch communicates with IPE modules over two separate interfaces. Voice and signaling data are sent and received over DS-30X loops and maintenance data is sent over a separate asynchronous communication link called the card LAN link.

Signaling data is information directly related to the operation of the telephone line. Some examples of signaling commands are as follows:

•off hook/on hook

•ringing signal on/off

•message waiting lamp on/off

Maintenance data is data relating to the setup and operation of the IPE card, and is carried on the card LAN link. Some examples of maintenance data are as follows:

•polling

•reporting of self-test status

•CPU initiated card reset

•reporting of card ID (card type and hardware vintage)

•reporting of firmware version

•downloading trunk interface unit configuration

•reporting of trunk interface unit configuration

•enabling/disabling of the DS-30X network loop bus

•reporting of card status

Circuit Card Description and Installation