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VISM Functional Description
The functions performed by VISM are described in the following sections:
"TDM Line-Handling Function" section on page 3-2
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"Bearer Processing Function" section on page 3-3
"Signaling Function" section on page 3-5
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"ATM Voice Data Processing Function" section on page 3-11
"Call Control Function" section on page 3-15
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"Embedded VISM Management Function" section on page 3-19
Figure 3-1
switched AAL2 PVC functions. Items with double asterisks indicate AAL2 trunking functions. Items
without asterisks indicate VoIP switching, switched AAL2 PVC, and AAL2 trunking functions.
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
shows the functional blocks of VISM. Items with single asterisks indicate VoIP switching and
C H A P T E R
Cisco VISM Installation and Configuration Guide
3
3-1
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