
Chapter 6 Multisite WAN with Distributed Call Processing
Dial Plan Considerations
6-18
Cisco IP Telephony Network Design Guide
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Figure 6-9 Using Cisco CallManager to Route Intercluster Calls
(408) 526-XXXX
5-digit internal dialing
Philadelphia
San Jose
Primary voice path
Strip “1408” and Deliver
61111 to Remote CallManager
Users required to dial
7 digits for intersite calls
“526-1111”
Secondary voice path
Prepend “1408” and send to PSTN
IP WAN
PSTN
VV
Route group
“SJ-IPWAN”
Route group
“PHL-PSTN”
2nd choice
prepend “1408”
1st choice
discard access
code “52”
H.323 device -
gatekeeper controlled
Route list
“SJ”
Route pattern
52.6XXXX
Philadelphia
route pattern
configuration
IP WAN
Gatekeeper(s)
PSTN
V
IP
IP
IP
V
IP
IP
IP
40807
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