[VoIP] Asterisk-Adtran dial rate

[ikjtel]

Replying on-list in the event that anyone else has
commentary to add.............

I believe there may be two separate issues here. 
First, the parameters you mention should be tweakable
via zaptel.h, specifically
zaptel.h:#define        ZT_DEFAULT_PULSEMAKETIME 50   
 /* 50 ms of line closed when dial pulsing */
zaptel.h:#define        ZT_DEFAULT_PULSEBREAKTIME 50  
 /* 50 ms of line open when dial pulsing */
zaptel.h:#define        ZT_DEFAULT_PULSEAFTERTIME 750 
 /* 750ms between dial pulse digits */

[Note, it is theoretically possible for user-space
(ztcfg) to override these, although I don't believe
this is currently implemented]

[Note 2, I believe that these values are not correct
for true Bell System dials, the ratio should be ~60/40
not 50/50]

The second issue is that several users have reported
erratic pulsing, which I have noticed too, just by
listening the problem is clearly audible.  Instead of
hearing regularly spaced pulses you hear plainly that
the spacing is irregular.

Try connecting a butt set (in monitor mode) to the
connection and listen to the outpulsing.   Best way to
test this is to use a string of several 'zero'
digits...

I recently was able to grab an FXO card for my channel
bank.  When it shows up (and when I get it set up)
I'll try to duplicate the problem.  I have released an
asterisk dial speed app that will also help pinpoint
it.  See URL

http://www.lightlink.com/mhp/dialtest/

Max

--- Kirt Stanfield <kirtley.stanfield at comcast.net>
wrote:

> Max,
> 
> I hope all is well with you.
> 
> Early this year I installed a Varian T1 card in my
> asterisk machine, and 
> connected it to an adtran channel bank. The channel
> bank has 5 FXS cards 
> and 1 FXO card. The former is connected to ground
> start 2 way trunks on 
> my step switch. The latter is connected to the
> incoming selectors on my 
> step switch.
> 
> In general the above configuration has performed
> well, with a tremendous 
> improvement in voice quality.
> 
> I have however seen evidence of misdialing into the
> switch via the FXO 
> card. I finally wrote a php script to dial over and
> over again, and from 
> that I have deduced that there is about a 5-10%
> misdial rate. I have now 
> place a Metro-Tel TPM32  'digit grabber' in the
> circuit. That indicates 
> that dialing is taking place at a rate of 13pps,
> instead of 10pps, which 
> I suspect is the reason why I am seeing the error
> rate that I am.
> 
> So my question is - can you tell me any place(s) in
> the asterisk or the 
> drivers that I could adjust so as to slow down the
> dial rate?
> 
> Thanks,
> Kirt
> 
> 



 
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