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MultiVOIP User Guide E1 PhoneBook Configuration
367
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).