[VoIP] Correct Way To Connect X100P To Step By Step Exchange?

[ikjtel]

--- Brent Jones <gijones at clear.net.nz> wrote:

> pulse dial patches needed. But what happens is when
> I dial, the
> subscribers line uniselector seems to hunt and step
> to the pulses. 
> Some of the last pulses seem to get through to the
> group selector and
> you see it moving verticaly.

Sounds offhand as though Lee's suggestion to add some
dead time (via the 'w') command might help.  I do
vaguely seem to recall, however, that John N. and
others had reported a while back that 'w' wasn't
working anymore or at all or something - has 'w' been
fixed or what? 

> 
> I have played around with the timings in zaptel.h
> but it doesn't seem
> to improve things.

Can you post specifically what values you've used
and/or changed?

> 
> Can someone please tell me what sort of settings
> they found to work
> for the timings. Also can someone please tell what
> settings they use
> for zaptel.conf and zapta.conf files.  Even a
> diagram of how you wired
> the FXO card to your PABX.
> 
> Also are X100P cards polarity sensitive with
> relationship to the line voltages ie
> does it matter which pin gets A or B leg .

As far as I know, absolutely not.  It shouldn't make
any difference...

> Do I need to put a 'w' in the dialing string before
> the first digit to let the subscriber
> uniselector hunt.
> 
> Does the FXO pulse dialing patch return the loop
> back to the exchange during dialing
> between digits?

Hmm, not sure what you mean by this.  There may be a
slight difference in terminology ;-)  The X100P does
implement what I call a 'spike filter' or transient
filter; immediately upon receipt of any pulse (or even
an inductuve transient, as PDW has found) it will go
into a guarded state in which its audio ckts are cut
out of the loop and not reconnected for approx.
150-250 msec.  I haven't been able to determine if
this is detectable by way of any momentary change in
loop current; however, I wouldn't expect this to be of
any consequence for a ckt that uses only relays...

> 
> Any ideas welcome.
> 
> Thanks
> Brent Jones
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