[asterisk-users] SPA3102 FAX not working

[Tim Nelson]

Can you clarify 'send FAX from SPA3102 to Asterisk' ? Are you running Fax for Asterisk software? Where do you expect your call to terminate? 


As I understand it, without FFA or some of the patches floating around, Asterisk is not T.38 gateway aware. Without more information, it's hard to pinpoint the issue, but as a first step, I would *DISABLE* the 'FAX Enable T38' parameter on the SPA3102. This will not help the reliability, but you may see the calls go through properly. 


A packet capture is always helpful as well. tcpdump on the Asterisk box or Wireshark on a box connected to your switch's mirror/span port will do. 

Tim Nelson 
Systems/Network Support 
Rockbochs Inc. 
(218)727-4332 x105 

----- "Gopalakrishnan A.N" <saigop at gmail.com> wrote: 
> Hi, 
> 
> I have created one SIP extension in Asterisk and configured that extension in SPA 3102 . And connected one FAX machine to the SPA3102 and one to Asterisk. 
> 
> The problem is if I try to send FAX from SPA3102 to Asterisk i am not able to send. But if the same if I try to send from Asterisk to SPA3102 it is working. 
> 
> In the SPA3102 following are the options I changed for the FAX settings, 
> 
> Call Waiting Serv:No 
> Three Way Call Serv:No 
> Preferred Codec:G711u 
> FAX Passthru Method:ReINVITE 
> DTMF Tx Mode:Normal 
> FAX Enable T38:yes 
> 
> After all these changes still I am not able to send the fax, while checking in the rtp debug from SPA3102 to Asterisk the sequential no. 0 but whereas from Asterisk to SPA3102 I can able to see some rtp traffic. 
> 
> Your help would be much appreciated.... 
> 
> 
> On Tue, Sep 7, 2010 at 10:30 PM, Gopalakrishnan A.N < saigop at gmail.com > wrote: 
> 

Hi, 
> 
> I have created one SIP extension in Asterisk and configured that extension in SPA 3102 . And connected one FAX machine to the SPA3102 and one to Asterisk. 
> 
> The problem is if I try to send FAX from SPA3102 to Asterisk i am not able to send. But if the same if I try to send from Asterisk to SPA3102 it is working. 
> 
> In the SPA3102 following are the options I changed for the FAX settings, 
> 
> Call Waiting Serv:No 
> Three Way Call Serv:No 
> Preferred Codec:G711u 
> FAX Passthru Method:ReINVITE 
> DTMF Tx Mode:Normal 
> FAX Enable T38:yes 
> 
> After all these changes still I am not able to send the fax, while checking in the rtp debug from SPA3102 to Asterisk the sequential no. 0 but whereas from Asterisk to SPA3102 I can able to see some rtp traffic. 
> 
> Your help would be much appreciated.... 

> -- 
> Thank you with regards, 
> Gopalakrishnan A.N, 
> 
> 
> 
> 

> -- 
> Thank you with regards, 
> Gopalakrishnan A.N, 
> 
> 
> 
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