CHAPTER
3-1
Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
3
VISM Functional Description
The functions performed by VISM are described in the following sections:
•“TDM Line-Handling Function” section on page 3-2
•“Bearer Processing Function” section on page 3-3
•“Signaling Function” section on page 3-5
•“ATM Voice Data Processing Function” section on page3-11
•“Call Control Function” section on page 3-15
•“Embedded VISM Management Function” section on page 3-19
Figure 3-1 shows the functional blocks of VISM. Items with single asterisks in dicate VoIP switching and
switched AAL2 PVC functions. Items with double asterisks indicate AAL2 t runki ng f unc tions. I tem s
without asterisks indicate VoIP switching, switched AAL2 PVC, and AAL2 trunking functions.