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November 2009 316
8 - ISDN Call Processing and
Management
This chapter describes ISDN call processing using BSMI-level call
control.
The chapter has the following sections:
ISDN Call Processing Overview
Translating Q.931 to Simple Message Interface
Using the overlap_rcv feature of L4L3mENABLE_
PROTOCOL
Q.921/Q.931 Timers
Brooktrout modules provide multipurpose platforms for fully
integrated network access. The nature of the functions performed by
this interface are determined by the host application developed to
control this interface.
Note: This chapter applies only to BSMI (low-level call control)
users. Bfv call control users do not need to be concerned with
this information.
Note: QSIG is not supported by BSMI.
C language code fragments have been included to illustrate key
points in the text. It is recommended that the information in this
section be reviewed in conjunction with the BSMI section of the Bfv
API Reference Manual, Volume 5.