Catalyst 4000 access gateway— Performs as a WAN router, H.323 voice over IP (VoIP) gateway, and an SCCP digital signal processor (DSP) farm for Cisco CallManager. The module also supports these interfaces:
- One Gigabit Ethernet 802.1Q trunk into the switch backplane, supporting up to six VLANs
Catalyst 4000 8-port RJ-21 FXS module— VoIP gateway with 8 FXS interfaces for analog phone and fax devices.
Catalyst 4224 ...