[Asterisk-Users] rxfax(spandsp-0.0.2pre18) and HT488

[Steve Underwood]

Rich Adamson wrote:

>Steve, what would help a bunch of people trying to implement your
>spandsp is some kind of help document that at least attempts to
>describe some of the debug statements shown below. When the average
>person reads "hdlc underflow" or "T4 timeout in state 9", we don't
>have a clue what those statements really mean or even if they need
>to be addressed. I've probably spent at least 60 hours doing the 
>same thing and finally gave up.
>
>If you really want to reduce your support overhead for spandsp, put
>something together that gives the implementor at least some clues
>how to read that stuff, and maybe even a clue how to resolve some
>of the more common issues. The foip.html appears to be a reasonable
>'background', but certainly not anything reaonable to resolve the
>OP debug output below.
>  
>
Actually, that page explains why he is wasting his time. It wasn't 
intended as background material. It was intended as the minimum needed 
to get people off my back when they insist that if they use ulaw or alaw 
FAXing over a VoIP channel must be OK. Its the only support for this 
kind of issue they will get from me.

Regards,
Steve

>>See http://www.soft-switch.org/foip.html
>>
>>Steve
>>
>>
>>Zen Kato wrote:
>>
>>    
>>
>>>After I did rxfax(...|debug), I got the followings;
>>>......(snip).......
>>> 
>>>
>>>      
>>>
>>>>>>DIS: 80 00 ce f4 80 80 81 80 80 80 18
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>HDLC underflow in state 9
>>>Changed from phase 4 to 3
>>>T4 timeout in state 9
>>>Changed from phase 3 to 4
>>>DIS:
>>> Prefer 256 octet blocks
>>> Can receive fax
>>> Supported data signalling rates: V.27ter and V.29
>>> R8x7.7lines/mm and/or 200x200pels/25.4mm
>>> 2D coding
>>> Scan line length: 215mm
>>> Recording length: Unlimited
>>> Receiver's minimum scan line time: 0ms at 3.85 l/mm: T7.7 = T3.85
>>> R8x15.4lines/mm
>>> Minimum scan line time for higher resolutions: T15.4 = T7.7
>>> North American Letter (215.9mm x 279.4mm)
>>> North American Legal (215.9mm x 355.6mm)
>>> 
>>>
>>>      
>>>
>>>>>>DIS: 80 00 ce f4 80 80 81 80 80 80 18
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>HDLC underflow in state 9
>>>Changed from phase 4 to 3
>>>T2 timeout
>>>Start receiving document
>>>Changed from phase 3 to 4
>>>DIS:
>>> Prefer 256 octet blocks
>>> Can receive fax
>>> Supported data signalling rates: V.27ter and V.29
>>> R8x7.7lines/mm and/or 200x200pels/25.4mm
>>> 2D coding
>>> Scan line length: 215mm
>>> Recording length: Unlimited
>>> Receiver's minimum scan line time: 0ms at 3.85 l/mm: T7.7 = T3.85
>>> R8x15.4lines/mm
>>> Minimum scan line time for higher resolutions: T15.4 = T7.7
>>> North American Letter (215.9mm x 279.4mm)
>>> North American Legal (215.9mm x 355.6mm)
>>> 
>>>
>>>      
>>>
>>>>>>DIS: 80 00 ce f4 80 80 81 80 80 80 18
>>>>>>       
>>>>>>
>>>>>>            
>>>>>>
>>>......(snip).......
>>>
>>>Does HT488 version-1.0.1.2 work OK?
>>>
>>>      
>>>
>
>
>_______________________________________________
>Asterisk-Users mailing list
>Asterisk-Users at lists.digium.com
>http://lists.digium.com/mailman/listinfo/asterisk-users
>To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
>  
>