Re: [hylafax-users] Multiple "MODEM No carrier"

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Antonio Almodóvar wrote:

> I've made a call to the modem. The modem answers but it seems that the
> modem doesn't detect the hangup. The modem stays waiting for carrier.
> I've changed the modem class from 1 to 2.1, and the modem works well.
> What's going on? Maybe line polarity issues?

Analog modems aren't typically capable of detecting a hangup.  Instead, 
your telco or your PBX is probably giving a "busy" signal after the 
hangup, and in Class 2.1 the modem is detecting the busy tone.  In Class 
1 we have no mechanism to detect a busy tone after the initial call 
connects.  And, unfortunately the Agere chipset on your modem is 
erroniously giving a "CONNECT" message on that tone:

Oct 01 12:09:43.28: [ 8035]: <-- [9:AT+FRH=3\r]
Oct 01 12:09:43.73: [ 8035]: --> [7:CONNECT]
Oct 01 12:09:44.68: [ 8035]: --> [2:10 03]
Oct 01 12:09:44.68: [ 8035]: --> [10:NO CARRIER]


So this is something that needs to be "fixed" in the HylaFAX Class 1 
driver.  I did get your last message, and I will get that fix done soon.

Lee.


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