[Asterisk-Dev] r option issue in app_dial

[Chuck Bunn]

Hi,

I am experiencing the same thing but with a slightly different twist 
that I think is related. (please see my post [Asterisk-Dev] Blind 
transferred user does not hear phone ring while waiting for phone to be 
picked up.) In my case the transferred user does not here ringing with 
or without the 'r' option on a blind transfer.

Thanks

Gil Kloepfer wrote:

>suppose I should), but this one may catch some of you off-guard:
>
>I discovered the other day that if Dial is used WITHOUT option 'r'
>Asterisk still provides ring progress tones to the caller.  Additionally,
>it does so without muting the channel audio (what happens when 'r' is used).
>
>By itself, this is a bug, but unfortunately I suspect many people have:
>
>      exten => 1234,1,Dial(SIP/1234)
>
>  instead of
>
>      exten => 1234,1,Dial(SIP/1234||r)   -or-  Dial(SIP/1234,,r)
>
>
>inside their extensions.conf file and have depended on the fact that
>the ring progress happened to be provided even though they didn't
>specify 'r'.
>
>I have provided a patch to fix app_dial (see bug ID #0005979) so that
>ring progress is handled as documented.  When this is committed (I hope
>it is) many people will likely report that callers aren't hearing ringing
>which will be due to ommissions in the dial plan (like demonstrated above).
>
>I discovered the bug since I have two Asterisk boxes between our SIP
>phones and the telco.  If I specify 'r' the line has the ringing feedback,
>but users never hear the telco informational progress messages (like 'the
>number you have reached has been disconnected').  All they hear is
>endless ringing.
>
>If I properly remove 'r', then Asterisk still was generating the ringing
>sound (bug), but the channel was unmuted (as it should be) and the telco
>ringing and Asterisk ringing were mixing together to form a very odd
>ring sound which was confusing our users.
>
>The "r" option for Dial() should only be specified on the terminal
>Dial application -- that is, the Dial that actually addresses a physical
>phone.  All other Dial() in between should not have "r" so the caller
>can hear the actual progress tones generated by the last PBX or switch
>in the chain that drives the physical device.  This is a very subtle
>point that I don't think many people understand.
>
>Anyhow, I hope this isn't too much for the -dev list, and that it
>helps give the developers a heads-up on this.  The proper use of
>Dial(tech||r) should probably be in the docs or in the sample
>extensions.conf somewhere.
>
>---
>Gil Kloepfer
>astr-dev at kloepfer.org
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