asterisk users - Oct 2008 - twice normal beep before busy tone ??

Hi,

I have a strange problem with our Asterisk installation. Outgoing calls 
are handled by the following lines:

exten => _0[2-9]X.,1,Set(CALLERID(num)=09999403${CALLERID(num)})
exten => _0[2-9]X.,2,SET(CALLERID(num)=${IF($[ ${CALLERID(num)} = 
0999940321]?099994030:${CALLERID(num)})})
exten => _0[2-9]X.,3,DIAL(CAPI/g1/${CALLERID(num)}:${EXTEN},180,tr)
exten => _0[2-9]X.,4,GOTO(fehler,s-${DIALSTATUS},1)

[fehler]
exten => s-BUSY,1,BUSY()

If the number that has been dialed is busy, I do not immediately get the 
busy tone. Instead I hear the tone for a free/calling line twice and 
then the busy tone. This happens when I call different numbers, so the 
cause seems to be on our side.

We are using Asterisk version 1.4.13.

Thanks for your help,

Stefan
-- 


********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
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          Beratung   Support
       Voice-over-IP-Loesungen
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On Fri, Oct 31, 2008 at 08:18:32AM +0100, Stefan Guenther
wrote:
> Hi,
> 
> I have a strange problem with our Asterisk installation. Outgoing calls 
> are handled by the following lines:
> 
> exten => _0[2-9]X.,1,Set(CALLERID(num)=09999403${CALLERID(num)})
> exten => _0[2-9]X.,2,SET(CALLERID(num)=${IF($[ ${CALLERID(num)} = 
> 0999940321]?099994030:${CALLERID(num)})})
> exten => _0[2-9]X.,3,DIAL(CAPI/g1/${CALLERID(num)}:${EXTEN},180,tr)
> exten => _0[2-9]X.,4,GOTO(fehler,s-${DIALSTATUS},1)
What happens if you do Answer() before the Dial?

Rob

On Fri, Oct 31, 2008 at 11:39:31PM +0000, Robert Lister
wrote:
> On Fri, Oct 31, 2008 at 08:18:32AM +0100, Stefan Guenther wrote:
> > Hi,
> > 
> > I have a strange problem with our Asterisk installation. Outgoing
calls
> > are handled by the following lines:
> > 
> > exten => _0[2-9]X.,1,Set(CALLERID(num)=09999403${CALLERID(num)})
> > exten => _0[2-9]X.,2,SET(CALLERID(num)=${IF($[ ${CALLERID(num)} = 
> > 0999940321]?099994030:${CALLERID(num)})})
> > exten => _0[2-9]X.,3,DIAL(CAPI/g1/${CALLERID(num)}:${EXTEN},180,tr)
> > exten => _0[2-9]X.,4,GOTO(fehler,s-${DIALSTATUS},1)
> 
> What happens if you do Answer() before the Dial?
Also try without the "r" option to the dial command:

http://www.voip-info.org/wiki-Asterisk+cmd+dial

Rob

Hi Rob,
>Also try without the "r" option to the dial command:
>
>http://www.voip-info.org/wiki-Asterisk+cmd+dial
>
>Rob
>
After I removed the "r" option I now nearly immediately get the busy
tone.

BUT: The wiki says "Without this option, Asterisk will generate ring 
tones automatically where it is appropriate to do so; however". What 
does appropriate mean?? After removing the "r" Asterisk starts playing
the ring tone, when the called phone starts ringing. When the called 
phone is a cell phone, this takes up to 3 seconds. During this time, 
there is silence!

Stefan

-- 


********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
      Schulungen  Installationen
          Beratung   Support
       Voice-over-IP-Loesungen
********************************************

Matt wrote:
------------------------------
 >What this means is that if the call is busy, it will play busy tones,
 >if the call is ringing it will play ringing, congestion, congestion
 >etc.
 >
 >The reason you are hearing silence is that Asterisk doesn't know what
 >the status of the call is before that.
 >The cell phone provider will likely take up to 3 seconds to tell your
 >machine what is happening with the call.
 >If you use the 'r' option then it will play ringing tones even if
the
 >phone is busy.
 >

well that means, that if I have a "bad" phone line (meaning poor 
quality) and I remove the "r", I will definitely have silence, when I 
call cell phone numbers and may have silence on calls to normal phones.

If I leave the "r" in the dial string, this removes the silence and
adds
the ring tone, with the disadvantage that I will even hear the ring tone 
on calls to busy numbers.

If that is true, the whole problem is related to the quality of the 
phone line, which prevents asterisk from getting the right status fast 
enough.

Regards,

Stefan

-- 


********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
      Schulungen  Installationen
          Beratung   Support
       Voice-over-IP-Loesungen
********************************************

Eric wrote:

 >It sounds like you have analog lines.  If that is the case, the silence
 >you experience is Asterisk sending the DTMF down the line.  Asterisk
 >collects the DTMF and when you are done dialing it retransmits those
 >digits down the analog line.  I think each digit is by default 300ms.
 >If you are dialing 10 digits you have a delay of 3.3 seconds while
 >Asterisk is sending the DTMF.  None of the VoIP protocols have his
 >issue.  ISDN PRI or BRI also does not have this issue.
 >
GREAT! Our client has 4 ISDN lines and we are using a DIALOGIC 4Port 
BRI. But the exchange point (don't know how to translate 
"Vermittlungsstelle) of the German Telecom is nearly 5 KM away. Maybe 
this distance causes the trouble?

Stefan
-- 


********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
      Schulungen  Installationen
          Beratung   Support
       Voice-over-IP-Loesungen
********************************************