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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
Chapter 2
Illustrated Card List for MGX Switches and the MGX 8880 Media Gateway
Front Cards
VXSM
Supported models: MGX 8850 (PXM45), MGX 8850/B (PXM45), MGX 8880
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 which the digital signal processors (DSPs) are
installed. The front card and daughter card are installed as a single assembly and require only one slot.
The complement of cards is as follows.
Front Cards
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 card ports.
•
MGX-VXSM-T3—A double-height card used with T3 back card ports.
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.
Back Cards
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 lower 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.
–
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).