Cas Processing—Message Structure; Figure - Cisco Voice Interworking Services (VISM) Installation And Configuration Manual

Chapter 3 VISM Functional Description

Figure 3-3

PVC operating modes.
Figure 3-3
A-B bits
T1/E1 Lines
A-B bits
Figure 3-4
the call agent, and the telephone equipment on the DS0.
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
shows the messages involved in CAS processing with the VoIP switching and switched AAL2
CAS Processing—Message Structure
Events
Digits
DSPs
Actions
& Drivers
Digits
Tones
shows the local CAS processing call setup message sequences which occur between VISM,
DTMF, MF, Fax, & Modem tones
Off/on hook
Hook flash
Start/End MF string
Tx A-B bits
Report A-B bits
Present dial string
Report tone generation
Begin/End tone generation
Cisco VISM Installation and Configuration Guide
Signaling Function
Notify
Messages
Call
Agent
Notification
Requests
3-7