Re: [hylafax-users] Failure to train remote modem at 2400 bps or minimum speed.

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Songtao Yu wrote:
> Dec 30 20:58:25.00: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:25.79: [ 5725]: --> [7:CONNECT]
> Dec 30 20:58:26.92: [ 5725]: --> HDLC<5:FF C8 22 67 DD>
> Dec 30 20:58:26.96: [ 5725]: --> [2:OK]
> Dec 30 20:58:26.96: [ 5725]: SEND training at v.17 12000 bit/s
>
> Dec 30 20:58:32.08: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:32.90: [ 5725] : --> [7:CONNECT]
> Dec 30 20:58:33.99: [ 5725]: --> HDLC<5:FF C8 22 67 DD>
> Dec 30 20:58:34.05: [ 5725]: --> [2:OK]
> Dec 30 20:58:34.05: [ 5725]: SEND training at v.29 9600 bit/s
>
> Dec 30 20:58:38.14: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:38.96: [ 5725]: --> [7:CONNECT]
> Dec 30 20:58:40.07: [ 5725]: --> HDLC< 5:FF C8 22 67 DD>
> Dec 30 20:58:40.13: [ 5725]: --> [2:OK]
> Dec 30 20:58:40.13: [ 5725]: SEND training at v.29 7200 bit/s
>
> Dec 30 20:58:44.22: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:45.08: [ 5725]: --> [7:CONNECT]
> Dec 30 20:58:46.15: [ 5725]: --> HDLC<5:FF C8 22 67 DD>
> Dec 30 20:58:46.23: [ 5725]: --> [2:OK]
> Dec 30 20:58:46.23: [ 5725]: SEND training at v.27ter 4800 bit/s
>
> Dec 30 20:58:50.63: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:51.44: [ 5725]: --> [7:CONNECT]
> Dec 30 20:58:52.56: [ 5725]: --> HDLC<5:FF C8 22 67 DD>
> Dec 30 20:58:52.61: [ 5725]: --> [2:OK]
> Dec 30 20:58:52.61: [ 5725]: SEND training at v.27ter fallback mode
> 2400 bit/s
>
> Dec 30 20:58:57.27: [ 5725]: <-- [9:AT+FRH=3\r]
> Dec 30 20:58:58.10: [ 5725]: --> [7:CONNECT]
> Dec 30 20:58:59.20: [ 5725]: --> HDLC<5:FF C8 22 67 DD>
> Dec 30 20:58:59.26: [ 5725]: --> [2:OK]
> Dec 30 20:58:59.26: [ 5725]: TRAINING failed

The receiver rejected the training signal at all speeds. This is
indicative of audio quality problems somewhere between the modem and the
receiver.

Thanks,

Lee.


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