Catalyst 4000 Modules
The Catalyst 4000 currently offers a mid-range hardware-based conferencing and
transcoding solution.The Catalyst 4000 Access Gateway Module (AGM) provides
the following services to the Catalyst 4000 switch: IP WAN routing,VoIP, and IP
telephony.The Catalyst 4000 AGM supports voice interface cards (VICs) and
WAN interface cards (WICs) from the 1600/1700/2600/3600 Series routers.The
AGM supports the following ports and slots:
Two VIC/WIC slots (VWICs,VICs, and WICs)
One dedicated VIC slot (VWICs and VICs)
FlexSlot High Density Analog (8-port RJ-21 FXS module)
Four DSP SIMM slots
64 or 128MB memory SIMM slot (Integrated Service Adapter)
VoIP gateway mode requires DSP resources to convert voice calls into data
packets.The Cisco IOS IP/DSP Plus feature set is another requirement to allow
VoIP gateway capabilities.The AGM supports the following interfaces as a VoIP
gateway:
T1 and E1 ISDN Primary Rate Interface (PRI)
T1 Channel Associated Signaling (CAS)
Foreign Exchange Office (FXO)
Foreign Exchange Station (FXS)
Ear & Mouth (E&M)
The AGM also supports functioning as a DSP farm for Cisco CallManager. In
turn, Cisco CallManager can be configured to provide hardware-based meet-me
and ad-hoc conferencing features.The Catalyst 4000 gateway module has four
DSP SIMMs with each SIMM having six DSPs for a total of 24 DSP resources.
Table 6.2 summarizes the Catalyst 4000 AGM capabilities.