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Remote Site Telephony and Branch Redundancy Options

Chapter Description

Hannah and Behl introduce and explain the various options for deploying remote site telephony solutions and providing a level of redundancy for remote branches/offices including Cisco Business Edition, Cisco Unified Communications Manager Express, SRST, and other mechanisms.

SRST IOS Dial Plan

When the endpoints enter SRST/E-SRST, a dial plan is required such that in absence of CUCM the router can route calls to/from PSTN/ITSP (SIP provider). Example 5-4 shows a basic dial North America Numbering Plan (NANP) for the SRST gateway to accept incoming calls and enable users to dial emergency, local, national, and international numbers. The configuration also includes routing for incoming calls.

Example 5-4 SRST Router Dial Plan Configuration

SRST-Router(config)# dial-peer voice 100 pots
SRST-Router(config-dial-peer)# description all incoming calls
SRST-Router(config-dial-peer)# incoming called-number .
SRST-Router(config-dial-peer)# direct-inward-dial
SRST-Router(config-dial-peer)# port 0/1:23
SRST-Router(config-dial-peer)# forward-digits all
!
SRST-Router(config)# dial-peer voice 10 pots
SRST-Router(config-dial-peer)# description Local outgoing calls
SRST-Router(config-dial-peer)# destination-pattern 9[2-9]......
SRST-Router(config-dial-peer)# port 0/1:23
SRST-Router(config-dial-peer)# forward-digits all
!
SRST-Router(config)# dial-peer voice 20 pots
SRST-Router(config-dial-peer)# description Long Distance outgoing calls
SRST-Router(config-dial-peer)# destination-pattern 91[2-9]..[2-9]......
SRST-Router(config-dial-peer)# port 0/1:23
SRST-Router(config-dial-peer)# forward-digits all
!
SRST-Router(config)# dial-peer voice 30 pots
SRST-Router(config-dial-peer)# description International outgoing calls
SRST-Router(config-dial-peer)# destination-pattern 9011T
SRST-Router(config-dial-peer)# port 0/1:23
SRST-Router(config-dial-peer)# forward-digits all
!
SRST-Router(config)# dial-peer voice 911 pots
SRST-Router(config-dial-peer)# description Emergency calls to 911
SRST-Router(config-dial-peer)# destination-pattern 911
SRST-Router(config-dial-peer)# port 0/1:23
SRST-Router(config-dial-peer)# forward-digits all

The next section describes the CUCM side of configuration to support SRST.

6. CUCM SRST Configuration | Next Section Previous Section

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