Re: [hylafax-users] Zoom 2929L modem (Lucent 1673TV8) skips scanlines

[Lee Howard <lee.howard@xxxxxxxxxxxx>]

Mufit Eribol wrote:
> > Mufit Eribol wrote:
> > > I have been using this modem for some time. The chip is Lucent 
> > > (1673TV8 28RDD 9944S 3148355). It is configured as Class 1 modem. 
> > > There is no problem in receiving. But, it often skip scan lines when 
> > > sending. Interestingly, when it skips, it insists on skipping almost 
> > > the same lines. No errors in any log file.
>
> Mar 26 23:05:19.06: [ 2791]: REMOTE best rate 9600 bit/s
> Mar 26 23:05:19.06: [ 2791]: REMOTE max A4 page width (215 mm)
> Mar 26 23:05:19.06: [ 2791]: REMOTE max unlimited page length
> Mar 26 23:05:19.06: [ 2791]: REMOTE best vres 7.7 line/mm
> Mar 26 23:05:19.06: [ 2791]: REMOTE format support: MH
> Mar 26 23:05:19.06: [ 2791]: REMOTE best 20 ms, 10 ms/scanline
> Mar 26 23:05:19.06: [ 2791]: USE 9600 bit/s
> Mar 26 23:05:19.06: [ 2791]: SEND file "docq/doc19.ps;00"
> Mar 26 23:05:19.06: [ 2791]: USE A4 page width (215 mm)
> Mar 26 23:05:19.06: [ 2791]: USE unlimited page length
> Mar 26 23:05:19.06: [ 2791]: USE 3.85 line/mm
> Mar 26 23:05:19.06: [ 2791]: USE 1-D MH
> Mar 26 23:05:19.06: [ 2791]: USE 20 ms/scanline
> Mar 26 23:05:19.06: [ 2791]: SEND training at v.29 9600 bit/s 

Well, first of all realize that this is a non-ECM session, so perfect 
copy quality cannot be guaranteed.  The sender needs to support ECM to 
get guaranteed perfect copy quality.

However, the problem is most likely due to some consistent audio 
corruption problem on the phone line (are you using VoIP?) or because 
flow control on your modem is broken.

So take a look at your modem config file and if you're using 
"FlowControl: xonxoff" change that to rtscts or vice-versa.  If that 
doesn't help then it's probably due to audio corruption on the line 
somewhere between you and the receiver, and you'll need to work with the 
telephone companies involved to clear it out.

Again, if you're using VoIP then this is no surprise.

Thanks,

Lee.

--
*Lee Howard*
*Mainpine, Inc. Support Manager*
Tel: +1 866 363 6680 ext 4 | Fax: +1 360 462 8160
lee.howard@xxxxxxxxxxxx <mailto:lee.howard@xxxxxxxxxxxx> | 
www.mainpine.com <http://www.mainpine.com>


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