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 Post subject: New to DID numbers
PostPosted: Wed Aug 06, 2008 10:02 pm 
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Joined: Sun May 11, 2008 7:28 pm
Posts: 23
Hi, I am new to DID numbers and I have some questions about how they work and how will they help me with my setup.

I am running the traditional prepaid callingcard application that comes with a2billing (PBX in a Flash) and a TDM400P to receive calls from the PSTN, so the local US caller enters a pin number and makes an international call through my VoIP termination provider.

My TDM400P currently has only one FXO to receive the incomming calls, and therefore my system can handle only one call at a time. In order to have simultaneous calls, adding FXO modules and analog lines doesn't look like the right solution, so my questions are:

1) Are DID numbers (or DID number channels) the usual solution to handle simultaneous calls in a setup like the one described above?

2) Can DID numbers be created from my PIAF based system (from the DID section in a2billing)? Or should I buy them from DID providers and route them somehow to my PBX?

3) If DID numbers can handle my local incoming calls in this setup, does it mean that my TDM400P and analog lines are not needed? If so, will they work if I wanted to do some US termination services in the future?

4) Will international DID numbers allow my potential customers outside of the US to call the US using the setup described above?

Thank you in advance for your help.


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 Post subject: Re: New to DID numbers
PostPosted: Wed Aug 06, 2008 11:05 pm 
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Joined: Thu Jun 22, 2006 2:19 pm
Posts: 2890
Location: Devon, UK
habreu wrote:
1) Are DID numbers (or DID number channels) the usual solution to handle simultaneous calls in a setup like the one described above?
Yes, but beware that some DID suppliers charge extortionate rates for multiple channels.
Quote:
2) Can DID numbers be created from my PIAF based system (from the DID section in a2billing)? Or should I buy them from DID providers and route them somehow to my PBX?
You can't 'create' a DID. They are allocated to you by telcos. So yes, you'll need to enlist the services of a DID provider.
Quote:
3) If DID numbers can handle my local incoming calls in this setup, does it mean that my TDM400P and analog lines are not needed?
If you have your DIDs delivered to you via VoIP, then you no longer need the Digium card.
Quote:
If so, will they work if I wanted to do some US termination services in the future?
Of course. Just create a trunk in A2B and modify your rate cards to send the applicable numbers to this trunk.
Quote:
4) Will international DID numbers allow my potential customers outside of the US to call the US using the setup described above
Yes, you can purchase as many DIDs in as many territories as you like and have them all answer with A2B's IVR. You can even add an additional per-minute charge for each DID if you so desire.


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 Post subject:
PostPosted: Thu Aug 07, 2008 5:38 pm 
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Joined: Sun May 11, 2008 7:28 pm
Posts: 23
Thank you very much for this information!!


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