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Chapter 5: Phonebook Configuration
Multi-Tech Systems, Inc. 93
Europe
The most direct use of the VOIP system is making calls between the offices where the VOIPs are located.
Consider, for example, the Wren Clothing Company. This company has VOIP-equipped offices in London, Paris,
and Amsterdam, each served by its own PBX. VOIP calls between the three offices completely avoid
international long-distance charges. These calls are free. The phonebooks can be set up to allow all Wren
Clothing employees to contact each other using 3-, 4-, or 5-digit numbers, as though they were all in the same
building.
France
The
Netherlands
5
5
Wren Clothing Co.
VOIP/PBX Site
London
5
Wren Clothing Co.
VOIP/PBX Site
Amsterdam
Wren Clothing Co.
VOIP/PBX Site
Paris
United Kingdom
Free VOIP Calls
Figure 5-13: Free VOIP calls
In another use of the VOIP system, the local calling area of each VOIP location becomes accessible to all of the
VOIP system’s users. As a result, international calls can be made at local calling rates. For example, suppose
that Wren Clothing buys its zippers from The Bluebird Zipper Company in the western part of metropolitan
London. In that case, Wren Clothing personnel in both Paris and Amsterdam could call the Bluebird Zipper
Company without paying international long-distance rates. Only London local phone rates would be charged.
This applies to calls completed anywhere in London’s local calling area. Generally, local calling rates apply only
within a single area code, and, for all calls outside that area code, national rates apply. There are, however,
some European cases where local calling rates extend beyond a single area code. Local rates between Inner
and Outer London are one example of this. It is also possible, in some locations, that calls within an area code
may be national calls - but this is rare.
France
The
Netherlands
5
5
Wren Clothing Co.
VOIP/PBX Site
London
5
Wren Clothing Co.
VOIP/PBX Site
Amsterdam
Wren Clothing Co.
VOIP/PBX Site
Paris
United Kingdom
Calls at London local rates
Local Calling Area
Bluebird Zipper Co.
London
Figure 5-14: Local calling area