McDewey

Use a Catalyst 8200 / 8300 / 8Kv or ISR 4461 with a time-division multiplexing (TDM) module as the PSTN gateway at headquarters. This configuration enables the gateway to implement media interworking for the organization's incoming and outgoing PSTN calls. At remote sites, deploy a Catalyst 8200 / 8300 / 8Kv or ISR 4461 for local PSTN connectivity using voice modules. For more information about Cisco ISR, see the data sheet.