IMG 1010 - RADIUS - Overlap Call Processing

On an incoming call, with RADIUS configured, the IMG will exchange the RADIUS Access-Request/Access-Accept messages with a configured RADIUS server. Within the Access-Request message among other info is the Called-Station-Id attribute. The Called-Station-Id attribute contains the Dialed Number in the incoming call. On a normal (enbloc) call where Overlap Signaling is disabled, the complete Dialed Number is sent to the RADIUS server within this message. With Overlap Signaling enabled, the Dialed Number is received in multiple incoming messages such as in Subsequent SAM messages or in multiple INVITE messages. In this scenario the Called-Station-Id attribute contained only part of the complete Dialed Number. This feature buffers the Dialed Number before sending the Access-Request message and when all digits are collected, it sends the Called Station-Id attribute to the RADIUS server for processing. The feature is always enabled and functions whenever Overlap signaling is enabled in the channel group object. Refer to the topic below for more information.

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