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
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