Hylafax Mailing List Archives

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: [hylafax-users] What does at+frh=3 mean?



mnoel@xxxxxxxxxxx wrote:

What does the line:
<-- [9:AT+FRH=3\r]
mean? It appears that it's sending a modem command but I can't figure out what +FRH=3 is supposed to mean.


It's a command that HylaFAX gives to the modem to listen for and report V.21 300 bps HDLC data. In traditional faxing virtually all messages and protocol (sometimes called "handshaking") is done with this method.

So when HylaFAX gives that command to the modem HylaFAX is expecting that the other end is going to transmit a message signal.

Also, I get a long series of these in triplets like this:
May 18 10:41:45.31: [12177]: <-- [9:AT+FRH=3\r]
May 18 10:41:45.51: [12177]: --> [5:ERROR]
May 18 10:41:45.51: [12177]: MODEM Command error
May 18 10:41:45.51: [12177]: <-- [9:AT+FRH=3\r]
May 18 10:41:45.71: [12177]: --> [5:ERROR]
May 18 10:41:45.71: [12177]: MODEM Command error
After several seconds of this my call drops with
RECV FAX: T.30 T2 timeout, expected page not received


The ERROR immediately following AT+FRH=3 without a CONNECT between them indicates that the modem is on-hook. Either the other side hung up or the modem hung up for us.

The fact that the command is repeated several times is something that can be improved in HylaFAX. Please send me your full log and I can make the fix.

Lee.


____________________ HylaFAX(tm) Users Mailing List _______________________ To subscribe/unsubscribe, click http://lists.hylafax.org/cgi-bin/lsg2.cgi On UNIX: mail -s unsubscribe hylafax-users-request@xxxxxxxxxxx < /dev/null *To learn about commercial HylaFAX(tm) support, mail sales@xxxxxxxxx*



Home
Report any problems to webmaster@hylafax.org

HylaFAX is a trademark of Silicon Graphics Corporation.
Internet connectivity for hylafax.org is provided by:
VirtuALL Private Host Services