Cisco Systems MGX 8800, MGX 8900 VXSM

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Cisco MGX 8800/8900 Series Hardware Installation Guide

Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006

Chapter2 Illustrated Card List for MGX Switches and the MGX 8880 Media Gateway

Front Cards

VXSM

The VXSM is Cisco’s next generation voice switch service module. When installed in an MGX 8850 or

MGX 8880 Media Gateway, the VXSM enables telephone calls on conventional time-division

multiplexed (TDM) circuits to be transmitted across IP or ATM networks.

Physically, a VXSM card set consists of a double-height front card and a single-height back card (or

cards). The front card includes a large daughter card on w hich the digital signal processors (DSPs) are

installed. The front card and daughter card are installed as a single asse mbly and require only one slot.

The complement of cards is as follows.

Two types of front card are supported:

•MGX-VXSM-155—A double-height card used with OC3 back card ports.

•MGX-VXSM-T1E1—A double-height card used with T1/E1 back car d ports.

•MGX-VXSM-T3—A double-height card used with T3 back card po rts.

Note that the VXSM front cards were renamed between MGX release 5.0.00 and 5.0.10:

•MGX-VXSM-4-155 became MGX-VXSM-155

•MGX-VXSM-48-T1E1 became MGX-VXSM-T1E1

Note The VXSM front cards use a dual latch system—to install a card, you must first hold up the metal latch

at the top of the card, then push down on the plastic latch.

The three types of back card are supported:

•VXSM-BC-4-155—A single-height card installed in the upper bay (for same card APS SONET line

protection, a second back card can be installed in the l ower bay). This card provides 4 OC-3 ports.

•VXSM-BC-24-T1E1—A single-height card. Two such cards are used as a pair. One card is installed

in the upper bay and one in the lower bay, providing a total interface for 48 T1/E1 lines.

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Each 24 T1/E1 back card is equipped with two 50-pin connectors, one for transmit signals and

one for receive signals. T1 and E1 lines should be connected through customer-supplied patch

panels. Examples are:

Ortronics 24 Port Patch Panel - Part # 808-044990

Ortronics 48 Port Patch Panel - Part # 808-045368

•VXSM-BC-3-T3—A single-height card. Two such cards can be used as a pair. One card is installed

in the upper bay and one in the lower bay, providing a total interface for 6 T3 lines.

•VXSM-R-BC—This is a redundant back card (no lines ).