[Asterisk-Users] FXO/FXS with T.38 over SIP

[Leo Ann Boon]

Steve,

Correct me if I'm wrong, T.38 can be implemented with or without TCP. I 
suspect these units only support T.38 over UDP, just like Cisco gateways 
(see 
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t11/faxapp/t38.htm).

In an ideal world, all fax relay should use TCP. I think Azacall 200 
supports T.38 over TCP, because it requires a separate port to be 
configured for T.38. I don't happen to have 2 azacalls to test. Anyone 
has the last word?

Cheers,
Leo

Steve Underwood wrote:

> Hi,
>
> T.38 should be completely insensitive to the number of hops. That is 
> its whole reason for existing. It sounds like these units are not 
> using T.38.
>
> Regards,
> Steve
>
>
> Leo Ann Boon wrote:
>
>> Try welltech 3502 (2-port) or 3504A (4-port). beware it only works if 
>> your 2 endpoints are not too many hops apart.
>>
>>
>> Elman Efendiyev wrote:
>>
>>> Hello,
>>>
>>> Could anybody suggest cheap FXO/FXS devices with full T.38 support over
>>> SIP?
>>> I found a number of devives with declared H323/SIP and T.38 support but
>>> some of them supports T.38 only with H323, others have buggy T.38
>>>
>>> -- 
>>> Sincerely,
>>> Elman Efendiyev
>>> elman at earlinvest.com
>>
>>
>
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