[asterisk-users] What don't I get about SIP?

[Mike]

Thanks Tim.

I've been trying to find out what's happening.  Basically, somehow, it seems
that my Polycom 501 knows what extensions are valid and which aren't in my
dialplan.  Obviously, the 501 doesn't really know that, but Asterisk seems
to return it this info (sort of :"valid", "invalid" or "could be valid, need
more digits to know") when I press send.

I know it sounds mad, and I would love nothing more than being told I am an
idiot because or x and y.  Why do I feel that this info is passed from
Asterisk to the 501?

Well, take the following (very simple) dialplan

[context_a]
Exten => 1234,1,Noop(foo)

Exten => _9XXXX,1,Noop(bar)

Exten => i,1,Noop(invalid)


What happens when I dial out is the following:

1) 1234: Noop(foo) ; good

2) 444444444: A congestion tone is heard from the phone (but Asterisk's CLI
doesn't show anything...no "sent into invalid extension '444444444' in
context 'context_a', but no invalid handler

3) 934 : It's invalid, but it could match the pattern is I added some
digits.  I expect an invalid extension message, but what actually happens is
the phone tries the send something (I can see an icon moving on the phone)
but the phone stays quiet (no stuttering tone or whatever).  It waits, I can
input more digits on the phone.

Let's just take 1) and 2).  Why is Asterisk not going into the i extension
like it should?

Mike






-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Tim St. Pierre
Sent: September 8, 2006 2:54 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] What don't I get about SIP?

With SIP, asterisk processes the digits it receives in the invite from the
Polycom.

There is no communication of dialplan information in SIP.  The polycom
should send the digits as soon as you press dial.  You can program the
polycom with a dialplan that will tell it when to send the digits, but that
only works if you dial off-hook.  I like on hook dialling, since it sends
what i tell it, when I tell it.  This should never happen when you press
dial - it should try right away.  My 301 does this, maybe they changed
something in the newer firmware?

-Tim

On September 8, 2006 14:33, Mike wrote:
> I've been running into an issue with my Polycom 501 and Asterisk.
>
> I realized, after much mucking around, that when I dial a number (and 
> press the send key) that is invalid , but could still match an 
> Asterisk pattern
> (example: I dial 567, which is not a valid extension, but my diaplan 
> accepts _567XXXX as a pattern) instead of sending the call as is and 
> ultimately failing, the phone is "intelligent enough" to sit and wait 
> for extra digits in case I meant to dial 567111.
>
> Now thats a problem for me.  How can I make Asterisk (or the 501) 
> treat the attempted extension 567 as a valid try and let Asterisk 
> handle the error ?(instead of the phone trying to do what it think is 
> best and handling the error on it's own).
>
> Is there an Asterisk setting for that?
> Failing that, is there a Polycom setting to disable this "intelligent"
> error handling?
>
>
> Mike

--
Tim St. Pierre

IP telephony specialist
sip://5101@communicatefreely.net
Toronto: 647 722 6930
Toll-Free 1 888 488 6940
tim at communicatefreely.net