asterisk users - Jan 2004 - Unexpected ISDN hangup on outbound call

We have setup an asterisk box to let everybody call into the university 
internal network, but I get unexpected hangups when doing an outbound call 
from SIP to the ISDN interface, and it happens from 20 seconds to some minutes
into the
call.

----------the dial and the problem-----------
    -- Executing Dial("SIP/57966-a19d",
"Modem/g1:96121||rt|") in new
stack
    -- Executing Dial("SIP/57966-a19d",
"Modem/g1:96121||rt|") in new
stack
    -- Called g1:96121
    -- Called g1:96121
    -- Modem[i4l]/ttyI1 answered SIP/57966-a19d
    -- Modem[i4l]/ttyI1 answered SIP/57966-a19d
voipgk*CLI> WARNING[81926]: File chan_sip.c, Line 464 (retrans_pkt): 
Maximum retries exceeded on call 4d86fdeb31edf97a@10.0.0.13 for seqno 102 
(Request)
    -- Hungup 'Modem[i4l]/ttyI1'
    -- Hungup 'Modem[i4l]/ttyI1'
-----------------

 Note: what sorts of problems by having 
the same number on 
voicemail and normal extensions? Since this saves numbers and eases the 
implementation....

Our system:
Asterisk on a RH8, with a Eicon Divas 2,01 PCI card.
using: modprobe hisax type=11 protocol=2  for it.

i use the  i4l driver, 

[modem.conf]
driver=i4l
context=remote
type=autodetect
dialtype=tone
mode=immediate
group=1
msn=57966
incomingmsn=57966,57881,57882,57883,57884,57885,57886,57887
device => /dev/ttyI0
device => /dev/ttyI1


[extensions.conf]
;having no time out on the call out... and no absolute timers
exten => _0[2-9]XXXXXXX,1,Dial(modem/g1:${EXTEN},,)
(I know i could have written NXXXXXXX but does it to easy reading)

Any tips or suggetions? I've searched the archives, but couldn't find
any
suitable answer.

Please feel free to contact me on or off list. 



-- 


With kind regards / Med vennlig hilsen


Sjur Eivind Usken

On Wed, 7 Jan 2004, Sjur Eivind Usken wrote:
> We have setup an asterisk box to let everybody call into the university 
> internal network, but I get unexpected hangups when doing an outbound call 
> from SIP to the ISDN interface, and it happens from 20 seconds to some
minutes into the
> call.
> 
> ----------the dial and the problem-----------
>     -- Executing Dial("SIP/57966-a19d",
"Modem/g1:96121||rt|") in new
> stack
>     -- Executing Dial("SIP/57966-a19d",
"Modem/g1:96121||rt|") in new
> stack
>     -- Called g1:96121
>     -- Called g1:96121
>     -- Modem[i4l]/ttyI1 answered SIP/57966-a19d
>     -- Modem[i4l]/ttyI1 answered SIP/57966-a19d
> voipgk*CLI> WARNING[81926]: File chan_sip.c, Line 464 (retrans_pkt): 
> Maximum retries exceeded on call 4d86fdeb31edf97a@10.0.0.13 for seqno 102 
> (Request)
>     -- Hungup 'Modem[i4l]/ttyI1'
>     -- Hungup 'Modem[i4l]/ttyI1'
> -----------------
As far as Asterisk is concerned, it never finished establishing the
SIP connection from the source phone.

I suggest enabling SIP debug and have a look at the messages.

Perhaps you have a NAT issue.

You may like to dial say the Echo application on your Asterisk server
to satisfy yourself that this isn't an ISDN issue.


Steve