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Chapter 9 Catalyst DSP Provisioning
Catalyst 4000 Voice Services
Catalyst 4000 Voice Services
The PSTN gateway and voice services module for the Catalyst 4003 and 4006
switches, supports three analog voice interface cards (VICs) with two ports each
or one T1/E1 card with two ports and two analog VICs. The VIC interfaces can
be provisioned in any combination of Foreign Exchange Office (FXO), Foreign
Exchange Station (FXS), or Ear & Mouth (E&M). Additionally, when configured
as an IP telephony gateway from the command line interface (CLI), this module
can support conferencing and transcoding services.
The Catalyst 4000 voice gateway module can be configured in either toll bypass
mode or gateway mode. However, the module’s conferencing and transcoding
resources can be configured only in gateway mode. Once the gateway mode is
enabled, the module’s 24 DSPs (4 SIMMs with 6 DSPs each) are automatically
provisioned as follows:
• PSTN gateway: 96 channels of G.711 voice and
• Conferencing: 24 channels of G.711 conferencing and
• MTP transcoding: 16 channels of LBR-G.711 transcoding
Figure 9-5 shows a physical representation of the Catalyst 4000 voice gateway
module in gateway mode.
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