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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter1 Overview of the VISM and VISM-PR Cards
Installing VISM Hardware and Software
VoAAL2 SVC is supported with the G.711, G.726, G.729a, and G.729ab codecs and profiles 1, 2, 3, 7,
8, 100, 101, 110, and 200.
Note The AAL1/AAL2 SVC operating modes require you to use a PXM1E or PXM45 in your MGX 8000
Series switch chassis.
Installing VISM Hardware and Software
You can install VISM cards in the following configurations:
Install a VISM front card and a back card as a pair. The front and back cards must occupy the same
slot.
Install a VISM front card with no back card. The MGX 8000 Series bulk distributio n featu re allows
this configuration. Access to and from the TDM lines is performed by the Service Resource Module
(SRM) and the MGX 8000 Series distribution bus.
Note VISM cards in bulk distribution mode do not require back cards.
Install a VISM front card as a redundant card with a re dun da nt b ack ca rd in the sa me sl ot.
Note VISM T1 front cards require T1 back cards and E1 front cards require E1 back cards. Ensure that
your configuration meets this requirement.
In each of these configurations, connections to the packet network are made through the MGX 8000
Series cellbus and an OC-3 port located on the MGX 8000 Series PXM card. Refer to the “VISM and
VISM-PR Card Physical Characteristics” section on page 1-5 for more information on front and back
cards.

Installing VISM Cards in MGX 8000 Series Chassis

VISM front and back cards can be installed in the following MGX 8000 Series platforms with these b asic
guidelines:
Cisco MGX 8850 Release 1—Up to 24 slots can be used for VISM cards.
Cisco MGX 8250—Up to 24 slots can be used for VISM cards.
Cisco MGX 8230—Up to eight slots can be used for VISM cards.
The VISM card can be used with the Processor Module-1 ( P XM1) ca rd.

Installing VISM-PR Cards in MGX 8000 Series Chassis

VISM-PR front and back cards can be installed in the following MGX 8000 Series platforms with these
basic guidelines:
MGX 8250 and MGX 8850—Up to 24 slots can be used for VISM-PR car ds.
MGX 8230—Up to 8 slots can be used for VISM-PR cards.