asterisk users - Apr 2004 - Dropped calls -> reproducing scenario

So I think I am able to reproduce the dropped call scenario.

Here is what I do to get a dropped call:
1. Call 1-800-tmobile
2. Go true their IVR and get connected to the customer service IVR
3. Enter my number and SSN
4. press 0
5. Then the audio please hold starts. After about 2-4 seconds the call
gets dropped.  (fast busy tone)

The time on my phone will stop running (call time) and I will get this error
in the asterisk logs:
    -- Executing Dial("SIP/113-94a1", "Zap/g1/18008662453")
in new stack
    -- Called g1/18008662453
    -- Zap/1-1 answered SIP/113-94a1
Apr 29 10:41:14 WARNING[-1210664016]: chan_sip.c:495 retrans_pkt: 
Maximum retries exceeded on call
113 for seqno 102 (Request)
    -- Hungup 'Zap/1-1'

I did this 4 times and all the time the exact same scenario. When I 
called from my cellphone everything was fine.

Any ideas?

Thanks,
             Thomas

I'm not too expert but it looks like you have some network/nat problem
from asterisk to your sip client, calls get terminated for a sip
problem, not for a telco one.



TG> So I think I am able to reproduce the dropped call scenario.

TG> Here is what I do to get a dropped call:
TG> 1. Call 1-800-tmobile
TG> 2. Go true their IVR and get connected to the customer service IVR
TG> 3. Enter my number and SSN
TG> 4. press 0
TG> 5. Then the audio please hold starts. After about 2-4 seconds the call
TG> gets dropped.  (fast busy tone)

TG> The time on my phone will stop running (call time) and I will get this
error
TG> in the asterisk logs:
TG>     -- Executing Dial("SIP/113-94a1",
"Zap/g1/18008662453") in new stack
TG>     -- Called g1/18008662453
TG>     -- Zap/1-1 answered SIP/113-94a1
TG> Apr 29 10:41:14 WARNING[-1210664016]: chan_sip.c:495 retrans_pkt: 
TG> Maximum retries exceeded on call
TG> 113 for seqno 102 (Request)
TG>     -- Hungup 'Zap/1-1'

TG> I did this 4 times and all the time the exact same scenario. When I
TG> called from my cellphone everything was fine.

TG> Any ideas?

TG> Thanks,
TG>              Thomas
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-- 
Best regards,
 Alessio                            mailto:afoc@interconnessioni.it

On Thu, 29 Apr 2004, Thomas Gallaway wrote:
> Here is what I do to get a dropped call:
> 1. Call 1-800-tmobile
> 2. Go true their IVR and get connected to the customer service IVR
> 3. Enter my number and SSN
> 4. press 0
> 5. Then the audio please hold starts. After about 2-4 seconds the call
> gets dropped.  (fast busy tone)
I wonder...  Are you using busydetect and/or callprogress on your Zap
channel?  Their hold music might be setting this off.

Cheers,
Vic Cross

Vic Cross wrote:
>On Thu, 29 Apr 2004, Thomas Gallaway wrote:
>
>  
>
>>Here is what I do to get a dropped call:
>>1. Call 1-800-tmobile
>>2. Go true their IVR and get connected to the customer service IVR
>>3. Enter my number and SSN
>>4. press 0
>>5. Then the audio please hold starts. After about 2-4 seconds the call
>>gets dropped.  (fast busy tone)
>>    
>>
>
>I wonder...  Are you using busydetect and/or callprogress on your Zap
>channel?  Their hold music might be setting this off.
>
>Cheers,
>Vic Cross
>  
>
[root@voip asterisk]# cat zapata.conf
[channels]
group=1
language=en
context=default
signalling=fxs_ks
echocancel=yes
echotraining=yes
rxgain=0.0
txgain=0.0
echocancelwhenbridged=yes
relaxdtmf=yes
immediate=no
busydetect=no
callprogress=no
musiconhold=default
usecallerid=yes
callerid=asreceived
channel=>1-4