[Asterisk-Users] T100P PRI question

Rich Adamson radamson at routers.com
Wed Dec 8 13:11:06 MST 2004


> > > Some telco's do, some telco's don't. The text "Rarely used for PRI" is IMO a
> > > location-centric and carrier-centric statement. As another poster suggested,
> > > PRI's are picky, and some carriers are super-picky so it's always best to
> > > dot your i's and cross your t's when dealing with PRI. At worst, it will be
> > > ignored by the switch. 
> > 
> > Actually, the worst that can happen is not being able to dial out the 
> > PRI to numbers that are not "national", "local", or "international".
> 
> This is incorrect. The numbers you send must be formatted differently 
> depending on what ton/npi you claim they are in. With "national" (the 
> asterisk default) you can not dial internationally if the switch is set up 
> according to itu specs. 
> 
> Also, a lot of switches will not accept all ton/npi combinations.
> 
> "Unknown" should really be the default. This allows you to send numbers 
> the way they are dialed on a POTS line, most of the time. As a second 
> option "international" is good since that allows all numbers to be dialed, 
> but you will have to prefix non-intrnational numbers with your country 
> code.
> 
> In the US the ton/npi seems to be used much less frequently than in the 
> rest of the world. Then again US carriers seem to use isdn as a T1 with a 
> little better setup/teardown. Nothing wrong with that but isdn can be a 
> lot more complex/capable.

Since this is my first * pri turnup, what should the dialing string look
like in the US? (All outgoing calls will either be local or national (US);
no need for international at this time).
Been using the following two numbers as examples:
  449-1234  = Local Call
  402-434-1234 = Long Distance Call
If I dial 449-1234 the call is completed via the pri. If I add the area
code (402-449-1234) the call is completed via the pri. If I add a "1"
in front, the call goes to a recording saying I don't need the "1".
If I call the 402-434-1234 (long distance), its blocked via a disconnect 
coming back from the telco (which is what was shown in the original debug
trace that started this thread).

Is there something different that I "should" be dialing?

Rich
 




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