[asterisk-r2] MFCR2 Cantv (Venezuela) Incomming. Sometimes calls works fine. Sometimes one call takes two channels (busy tone) and sometimes we receive "Protocol error. Reason = Multi Frequency Cycle Timeout"

[Loris Santamaria]

El mar, 24-08-2010 a las 12:23 -0430, jefedecomunicaciones escribió:
> 
> Hello,
> 
> As you can read in the subject, we have unusual behavior trying to set
> up an asterisk server using a R2 connection to CANTV in Venezuela.
> 
[...]

> Then with only one incomming call two channels change their bits to
> one, we could see it in the dahdi_tool.The call plays a busy tone
> 
> Asterisk Console>
> New MFC/R2 call detected on chan 10.
> New MFC/R2 call detected on chan 11.
> Asterisk Console>
> 
>  dahdi_tool shows two channels seized with the same call
> 
>                    1234567890123456789012345678901       
>             TxA 1111111111111111-11111111111111       
>             TxB 0110000000000000-11111111111111            
>             TxC 0000000000000000-00000000000000                 
>             TxD 1111111111111111-11111111111111 

It could be a CRC4 mismatch. Or, as strange and weird as it sounds we
had a similar problem when my mistake connected one of the coaxials of
the first E1 to the second E1 and viceversa, effectively crossing the
two E1!!!




> 
> Do you have any suggestions???
> 
> 
> Best Regards
> Ramón Jiménez
> -- 
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-- 
Loris Santamaria   linux user #70506   xmpp:loris at lgs.com.ve
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