[Asterisk-Users] New T100P Pri install suggestions?

[Rich Adamson]

> > 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. 

In my original posting, I noted that we elected to receive five digits
from Cox Cable (DID) for that very reason. Only four digits are
required today, but as you mentioned, five digits gives us some room
to grow without issues tomorrow. (BTW, I didn't mention, the current DID
numbers come from two central offices, so if we stay with the current
numbering scheme four-digit dup's are very possible in the future.)

Rich