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[asterisk-users] Toll free pattern matching

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darcy at Vex.Net
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Posted: Fri Aug 05, 2016 9:07 am Post subject: [asterisk-users] Toll free pattern matching

I have this in my config: exten => _800XXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN}) same => n,Dial(SIP/tollfree/1${EXTEN}) exten => _1800XXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN}) same => n,Dial(SIP/tollfree/${EXTEN}) exten => _NXXNXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN}) same => n,Dial(SIP/trunk/1${EXTEN}) exten => _1NXXNXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN}) same => n,Dial(SIP/trunk/${EXTEN}) I came across http://stackoverflow.com/questions/7235291/asterisk-priorities-that-have-a-possibility-of-matching which seems to imply that the above won't work and that all the calls would go to the trunk. However, this is working as expected for me. Did the behaviour change in the last four years or could I run into problems with this setup? Perhaps I am misunderstanding the poster's issue. -- D'Arcy J.M. Cain System Administrator, Vex.Net http://www.Vex.Net/ IM:darcy@Vex.Net VoIP: sip:darcy@Vex.Net -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users

rmudgett at digium.com
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Posted: Fri Aug 05, 2016 9:26 am Post subject: [asterisk-users] Toll free pattern matching

On Fri, Aug 5, 2016 at 9:06 AM, D'Arcy J.M. Cain <darcy@vex.net (darcy@vex.net)> wrote:

Quote:

I have this in my config:

exten => _800XXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN})
same => n,Dial(SIP/tollfree/1${EXTEN})
exten => _1800XXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN})
same => n,Dial(SIP/tollfree/${EXTEN})
exten => _NXXNXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN})
same => n,Dial(SIP/trunk/1${EXTEN})
exten => _1NXXNXXXXXX,1,Verbose(0,${CHANNEL(peername)} Calling ${EXTEN})
same => n,Dial(SIP/trunk/${EXTEN})

I came across
http://stackoverflow.com/questions/7235291/asterisk-priorities-that-have-a-possibility-of-matching
which seems to imply that the above won't work and that all the calls
would go to the trunk. However, this is working as expected for me.
Did the behaviour change in the last four years or could I run into
problems with this setup? Perhaps I am misunderstanding the poster's
issue.

Dialplan will stay on the current series of extensions until it runs out. If there isn't an explicit hangup

to stop execution it will look for the next priority match. You can easily test this yourself by creating

some test dialplan to match your situation.

Given the below dialplan:

exten = _800XXXXXX,1,NoOp(Start of 800 series)

same = n,NoOp(Next in 800 series)

exten = _NXXNXXXX,1,NoOp(Generic series)

same = n,NoOp(next in generic series)

same = n,NoOp(third in generic series)

If you have an 800 number starting in dialplan then these are the priorities

executed:

1, Start of 800 series

2, Next in 800 series

Since we have run out of the 800 series Asterisk looks for a priority 3 that matches the extension

and finds priority 3 of the generic series.

3, third in generic series

There is no priority 4 so the call is hung up.

Richard

[1] https://wiki.asterisk.org/wiki/display/AST/Contexts%2C+Extensions%2C+and+Priorities
[2] https://wiki.asterisk.org/wiki/display/AST/Pattern+Matching

darcy at Vex.Net
Guest

Posted: Fri Aug 05, 2016 9:54 am Post subject: [asterisk-users] Toll free pattern matching

On Fri, 5 Aug 2016 09:26:03 -0500
Richard Mudgett <rmudgett@digium.com> wrote:

Quote:

Dialplan will stay on the current series of extensions until it runs
out. If there isn't an explicit hangup

So glad I asked. I see now that it only worked because of the accident
that the specific 800 extension and the generic one just happened to
have the same number of priorities. I have added explicit hangups.

Thanks.

--
D'Arcy J.M. Cain
System Administrator, Vex.Net
http://www.Vex.Net/ IM:darcy@Vex.Net
VoIP: sip:darcy@Vex.Net

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tim.strommen at gmail.com
Guest

Posted: Fri Aug 05, 2016 7:43 pm Post subject: [asterisk-users] Toll free pattern matching

Don't forget to handle the other special extension cases in a [context]. What I find is a good practice is to write a root "catch-all" (template), then I tag that onto any new [context](template).

[Special-Extensions]

exten -> a,1,NoOp(Where a call jumps when the caller requests the assistant)
exten -> e,1,NoOp(Catchall where a call jumps with an exception on the call)
exten -> h,1,NoOp(Where a call jump with a hang up)
exten -> i,1,NoOp(Where a call jumps if an invalid extension is entered)
exten -> o,1,NoOp(Where a call jumps when a caller requests an operator)
exten -> s,1,NoOp(Where a call jumps to when a new call starts in a context if no extension is specified)
exten -> t,1,NoOp(Where a call jumps if the user did not enter a response to Background or WaitExten)
exten -> T,1,NoOp(Where a call jumps when it exceeds the absolute TIMEOUT value for a call).

[your-new-context](Special-Extensions)
...

-T

On Fri, Aug 5, 2016 at 7:53 AM, D'Arcy J.M. Cain <darcy@vex.net (darcy@vex.net)> wrote:

Quote:

On Fri, 5 Aug 2016 09:26:03 -0500
Richard Mudgett <rmudgett@digium.com (rmudgett@digium.com)> wrote:

Quote:

Dialplan will stay on the current series of extensions until it runs
out. If there isn't an explicit hangup

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