Catalyst 4000
The Catalyst 4000 series is comprised of the 4003, 4006, 4908G, and 4912G
models.The Catalyst 4003 and 4006 are modular chassis-based switches, which are
a large part of the Cisco AVVID architecture.The Catalyst 4000 series family
(which is actually a scaled down version of the Catalyst 6000) is targeted at branch
offices, enterprise wiring closets, and mid-range organizations.The Catalyst 4006
supports inline-power Ethernet modules for Cisco IP phones while the Catalyst
4003 uses inline-power patch panels. It must use an external Auxiliary DC Power
Shelf to provide the needed power to the IP phones. For providing gateway services
to the IP telephony network, Cisco has an Access Gateway Module (AGM),
WS-X4604-GWY, for the Catalyst 4000.
The AGM allows the Catalyst 4000 to be an integrated solution providing IP
WAN routing, gateway functionality to the PSTN and PBX, and DSP resources
for CallManager. It is supported in both the 4003 and 4006, and uses the same
VIC and voice WAN interface card (VWIC) modules as the 1750, 2600, and 3600
series routers.The AGM has one dedicated VIC slot and two VWIC slots, which
holds either a VIC,VWIC, or WIC module.The AGM can be connected to the
PSTN or a PBX, and act as a H.323 gateway for CallManager.Analog devices
such as phones, speakerphones, and faxes can be connected to the AGM via an 8-
port RJ-21 FXS module,WS-U4604-8FXS, or one of the VIC card ports.The
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86 Chapter 3 • AVVID Gateway Selection
8-port FXS module is installed in the FlexSlot on the AGM, and the FlexSlot supplements
the other three VIC slots. In the future, the AGM will support a 16-port
FXS module allowing the AGM to support up to a total of 22 analog ports.The
three VIC slots, each holding a two-port card, provide the six other ports. FXS,
FXO, or E&M VIC modules can be used in these three VIC slots.