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E1 Phonebook Configuration MultiVOIP User Guide
248
Site D calling Site F
A voip call from Inner London PBX to extension 7424 on the key telephone system in
Tavistock, UK.
A. The required entry in the London Outbound Phonebook to facilitate
origination of the call, would be 90182263742. The call would be directed to
the Tavistock voip’s IP address, 200.2.9.5. (Generally on such a call, the caller
would have to dial an initial “9”. But typically the PBX would not pass the
initial “9” dialed to the voip. If the PBX did pass along that “9” however, its
removal would have to be specified in the local Outbound Phonebook.)
B. The corresponding entry in the Tavistock Inbound Phonebook to facilitate
completion of the call would be
0182263742 for calls within the office at Tavistock
01822 for calls to the Tavistock local calling area (PSTN).
Call Event Sequence
1. Caller in Inner London dials 901822637424.
2. Inner London voip removes “9” .
3. Inner London voip passes remaining string, 01822637424on to the
Tavistock voip
at IP address 200.2.9.5.
4. The dialed string matches an inbound phonebook entry at the
Tavistock voip, namely 0182263742.
5. The Tavistock voip rings one of the three FXS ports connected to
the Tavistock
key phone system.
6. The call will be routed to extension 7424 either by a human
receptionist/
operator or to an auto-attendant (which allows the caller to specify
the
extension to which they wish to be connected).