Basic call state model


In Intelligent Network and CAMEL switching, a BCSM is a Basic Call State Model.

Types

A fundamental concept for IN control is the basic call state model. When a call is processed
by an exchange, the call goes through a number of pre-defined phases. These phases of the call are
described in the BCSM. The BCSM generally follows the ISUP signalling of a call

State machine description

In the following IN BCSMs, bold Detection Points and Points In Call are also present in the CAMEL Ph1 subset.
TODO: Expand to Ph2,3,4

O-BCSM

Points in call

Points in call