[Asterisk-Users] New T100P Pri install suggestions?

[Timothy Costello]

On Nov 30, 2004, at 10:36 AM, Steven Critchfield wrote:

> On Tue, 2004-11-30 at 10:22 -0600, Timothy Costello wrote:
>
>> 4) When an incoming call is presented on the PRI you will get some
>> number of digits put into EXTEN and the dialplan will try top match
>> it... i.e. if the DID range the telco has assigned you is (555)
>> 555-1100 thru (555) 555-1199 they will probably just send you the last
>> 2 or 4 digits, assuming 4 digits, you will get (and have to match in
>> your dialplan) 1100 thru 1199.
>
> If you are on a PRI, there is no time penalty in call setup to send the
> entire phone number. In fact, it is beneficial to have the full number
> as it reduces conflicts later on if you ever want to add numbers. Not 
> to
> mention you will make your telco provider much happier if they don't
> have to come up with consecutive phone numbers but rather can pull from
> any current gaps and possibly across exchange numbers.
>
> If you are on an E&M Wink where the number is transmitted via DTMF or
> MF, you will find a time penalty for each digit transmitted and
> therefore you will want to keep the number of digits low. OF course if
> you are choosing E&M wink, it is possible you aren't wanting to use any
> of the advance features of the PRI and/or are hamstrung by some other
> limitation outside of asterisk.
>

Very true! But most likely you will have to specifically request the 10 
digit number, by default most telcos (as evidenced by prior postings 
and my experiences
with SBC :-) will give you 4 digits.

PRI is definitely the way to go if only for the speed of call setup. 
Other nice features are the ability to send a PRI hangup cause, so if a 
given DID is not in use you can signal Out of Service just like the 
telco... I'm sure there are many more!

Later;
Tim