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voip origination and termnation mapping example

Posted on 2005-04-10
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Last Modified: 2010-04-12

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Here is an example which I was readng through in order to understand voip mapping.

Scenario:
A call coming from Gateway A reaches GK in the following format: 001#15103459987.
GK strips the origination map for Gateway A 001# and finds in its routing table that
Gateway B serves area code 1510. GK prepends the termination map for Gateway B to the
number and routs the call in the following format to Gateway B: 31169#15103459987.
Gateway B strips the prefix 31169# and terminates the call.

What I want to know is :

when the call reaches the gatekeeper from Gateway with a format of   001#15103459987 who is actually appendindg 001 to the number is it the user ?

and then why is gatekeeper changing it to  31169#15103459987 format, how was this decided ?
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Question by:kamal73
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grblades earned 2000 total points
ID: 13750946
It is probably the gateway adding the 001# prefix.

> and then why is gatekeeper changing it to  31169#15103459987 format, how was this decided ?
Because thats how the person configured it. There are many ways you can configure the systems when they transfer calls between themselves. The additional prefix could mean almost anything.
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