Configuring the Dial Plan
The company uses a dial plan as shown in Table 5.4.
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162 Chapter 5 • Voice and Video Gatekeeper Design
Table 5.4 Case Study: Company Dial Plan
H.323
Configured
Dial Pattern Meaning of Dial Pattern How the Call Is Routed
9* Dial 9 and any number The call is directed to the PSTN
of digits via the nearest location
(Boston, Atlanta, or Miami).
8#* Dial 8, then #, then any The call is directed to the ISDN
number of digits gateway in New York.
1… Dial 1 and any three digits The four-digit number is
routed to the Boston office.
2… Dial 2 and any three digits The four-digit number is
routed to the Atlanta office.
3… Dial 3 and any three digits The four-digit number is
routed to the Miami office.
4… Dial 4 and any three digits The four-digit number is
routed to the New York office.
5… Dial 5 and any three digits The four-digit number is
routed to the Washington office.
6... Dial 6 and any three digits The four-digit number is
routed to the Providence office.
Each gatekeeper must be configured according to the dial plan to be able to
route calls to the correct zone. Each gatekeeper is configured identically with each
of the dial prefixes shown in the preceding table so it is able to route any call.
For Atlanta:
zone prefix boston 1...
zone prefix atlanta 2...
zone prefix miami 3...
zone prefix newyork 4...
zone prefix washington 5...
zone prefix providence 6...
For Boston:
zone prefix boston 1...
zone prefix atlanta 2...
zone prefix miami 3...
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Voice and Video Gatekeeper Design • Chapter 5 163
zone prefix newyork 4...
zone prefix washington 5...
zone prefix providence 6...
For Miami:
zone prefix boston 1...
zone prefix atlanta 2...
zone prefix miami 3...
zone prefix newyork 4...
zone prefix washington 5...
zone prefix providence 6...