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MultiVOIP User Guide E1 PhoneBook Configuration
249
Site F calling Site D
A voip call from a Tavistock key extension to extension 3117 on the PBX in Inner
London.
A. The required entry in the Tavistock Outbound Phonebook to facilitate
origination of the call, would be “3”. The string 02073988 is added, preceding
the “3”. The call would be directed to the Inner London voip’s IP address,
200.2.9.9.
B. The corresponding entry in the Inner-London Inbound Phonebook to
facilitate completion of the call would be 020739883.
1. The caller in Tavistock picks up the phone receiver, presses a
button on the key phone set. This button has been assigned to a
particular voip channel.
2. The caller in Tavistock hears dial tone from the Tavistock voip.
3. The caller in Tavistock dials 02073983117.
4. The Tavistock voip sends the entire dialed string to the Inner-
London voip
at IP address 200.2.9.9.
5. The Inner-London voip matches the called digits 02073983117to its
Inbound Phonebook entry “020739883, ” which it removes. Then it
adds back the “3” as a prefix.
6. The Inner-London PBX dials extension 3117 in the office in Inner
London.
Variations in PBX Characteristics
The exact dialing strings needed in the Outbound and Inbound
Phonebooks of the MVP3010 will depend on the capabilities of the PBX.
Some PBXs require trunk access codes (like an “8” or “9” to access an
outside line or to access the VOIP network). Other PBXs can
automatically distinguish between intra-PBX calls, PSTN calls, and
VOIP calls.
Some PBX units can also insert digits automatically when they receive
certain dialing strings from a phone station. For example, a PBX may
be programmable to insert automatically the three-digit VOIP identifier
strings into calls to be directed to analog VOIPs.
The MVP3010 offers complete flexibility for inter-operation with PBX
units so that a coherent dialing scheme can be established to connect a
company’s multiple sites together in a way that is convenient and
intuitive for phone users. When working together with modern PBX
units, the presence of the MVP3010 can be completely transparent to
phone users within the company.