Re: [hylafax-users] Decrease error check will prevent T.30 T2 timeout error ?

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

George H wrote:

> May 03 21:25:59.79: [20304]: --> [10:NO CARRIER]
> May 03 21:25:59.79: [20304]: <-- [9:AT+FRH=3\r]
> May 03 21:26:18.59: [20304]: --> [10:NO CARRIER]


18 seconds from the time of the Phase C carrier loss and the modem still 
doesn't detect any V.21 signalling from the sender.  Either the sender 
messed up or the modem's V.21 HDLC detection did.

That said, USR modems are quirky - *moreso* in Class 2.0 than in Class 
1.  I would recommend that you re-run faxaddmodem for the USR so that 
you can get this entry in your modem config file:

#
# When using AT+FRS=n we see USR modems reset themselves in the middle 
of sessions
# this is not good.  So, we seem to work-around that problem by not 
using the
# command.  Unfortunately, this isn't an ideal thing.
#
Class1SwitchingCmd:     "<delay:7>"

Many USR modem users have reported that avoiding AT+FRS=7 helps them.  
Its use seems to _sometimes_ cause issues later for the USRs.

Lee.

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