[SIPForum-discussion] CENTREX Solution with SIP

[Dilip Kumar]

Hi Ali,

You should deploy a voip gw which converts the isdn signaling into SIP. With
this you can all office talk to each other with unique dial-plan defined for
each location.

Regards,
Dilip

On Mon, Nov 29, 2010 at 9:20 PM, Ali Kemal MAYUK <alikemalmayuk at gmail.com>wrote:

> Hi all;
>
> I am investigating about how Centrex work with SIP. If an enterprise
> customer has a 2 different locations, how they call each other with short
> numbers(4 digit) ? Which SIP headers are used for it? Is there a
> standartization ? Does any one have a solution documentation? How the big
> companies handle it?
>
> --
> Kemal
>
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