Re: V17 vs V34, MSANs and faxanswer

Lee Howard <[email protected]> Fri, 8 Jun 2018 14:10:34 -0700
Newsgroups	gmane.comp.telephony.fax.hylafax.user
Message-ID	<[email protected]>
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On 06/08/2018 12:48 AM, Christo Labuschagne wrote:
> Files attached show the two different failures I saw.=C2=A0 c00000006 i=
s=20
> the one I saw most.=C2=A0 c000000013 I only saw once.

They look like poor line audio quality issues... typical stuff for VoIP=20
lines.

> Not sure in which countries you still get end to end copper PSTN=20
> lines.=C2=A0 I think almost all run a VoIP backbone?=C2=A0 Believe me, =
not my=20
> first choice!

PSTN does not have to be copper end-to-end.=C2=A0 For much of it there wi=
ll=20
be fiber, and it will be digital rather than analog, too.=C2=A0 It's just=
 a=20
different network - designed to ensure first-in-first-out service.=C2=A0=20
That's quite distinct from the jittery IP internet.

> DynamicConfig seems to be used after modem setup.=C2=A0 AT+F34 is the=20
> command used to setup V34 capabilities for the device.=C2=A0 This will=20
> already have been called during modem setup before DynamicConfig gets=20
> called, correct?=C2=A0 This seems to cause the next call to use the=20
> Class1EnableV34Cmd and not the current call

So, you'd use DynamicConfig (adjusting ModemAnswerCmd) to disable what=20
was enabled previously.=C2=A0 Something like:

ModemAnswerCmd: "AT+FCLASS=3D1;A"

That said, I don't think that ANSam is your problem.

What kind of modem are you using?

Thanks,

Lee.

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    <div class=3D"moz-cite-prefix">On 06/08/2018 12:48 AM, Christo
      Labuschagne wrote:<br>
    </div>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <div dir=3D"ltr">
        <div>
          <div class=3D"gmail_extra">
            <div class=3D"gmail_quote">Files attached show the two
              different failures I saw.=C2=A0 c00000006 is the one I saw
              most.=C2=A0 c000000013 I only saw once.</div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    They look like poor line audio quality issues... typical stuff for
    VoIP lines.<br>
    <br>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <div dir=3D"ltr">
        <div>
          <div class=3D"gmail_extra">
            <div class=3D"gmail_quote">Not sure in which countries you
              still get end to end copper PSTN lines.=C2=A0 I think almos=
t
              all run a VoIP backbone?=C2=A0 Believe me, not my first cho=
ice!</div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    PSTN does not have to be copper end-to-end.=C2=A0 For much of it ther=
e
    will be fiber, and it will be digital rather than analog, too.=C2=A0 =
It's
    just a different network - designed to ensure first-in-first-out
    service.=C2=A0 That's quite distinct from the jittery IP internet.<br=
>
    <br>
    <blockquote type=3D"cite"
cite=3D"mid:[email protected]=
l.com">
      <div dir=3D"ltr">
        <div>
          <div class=3D"gmail_extra">
            <div class=3D"gmail_quote">DynamicConfig seems to be used
              after modem setup.=C2=A0 AT+F34 is the command used to setu=
p
              V34 capabilities for the device.=C2=A0 This will already ha=
ve
              been called during modem setup before DynamicConfig gets
              called, correct?=C2=A0 This seems to cause the next call to=
 use
              the Class1EnableV34Cmd and not the current call</div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    So, you'd use DynamicConfig (adjusting ModemAnswerCmd) to disable
    what was enabled previously.=C2=A0 Something like:<br>
    <br>
    ModemAnswerCmd: "AT+FCLASS=3D1;A"<br>
    <br>
    That said, I don't think that ANSam is your problem.<br>
    <br>
    What kind of modem are you using?<br>
    <br>
    Thanks,<br>
    <br>
    Lee.<br>
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</html>

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