[VoIP] SxS Call Progress Sounds

[John Novack]

ikjtel wrote:
> This seems to be working fairly nicely now.  Switching
> from an X100P-FXO to a channel-bank FXO has *vastly*
> improved the experience, because the dial tone is
> still perfectly audible throughout the *entire* first
> digit, including the onhook portions of the outpulsing
> cycle.  There is no missing audio in the entire
> sequence, especially now you can hear the "clunk" as
> the selector cuts through to the connector!  
>
> Too bad the "2600" SF pulsing stuff isn't included.  I
> once lived in a No. 5 Crossbar that had SF trunks to a
> number of outlying SxS offices and spent a lot of time
> with a homemade 2600 keying unit dialing through
> them...  If the SF stuff were present, it would be
> possible to dial through the machine remotely, *in
> real time*.
>   
Perhaps a collaboration could see that back in down the road.
One CNEt person is considering some SF trunking in his switch as well, 
but he needs to finish his CO shed and install his EM switch before 
going on line
With a little luck that will happen before Summer.
> Not sure exactly what to attribute the "irregular"
> pulsing.  The proper way to isolate this will be to
> back out the patches and listen with a butt set to the
> outpulsing, see if the removal of the patch makes the
> pulsing more regular or not.
>   
With Zaptel-1.2.16 there seems to be a problem BEFORE patching.
IF I am able to today, I will look into that

> John Novack - your XY office returns a fast-busy to
> the caller during the outpulsing of the digit into its
> first selector. 
Right now, I have an FXO circuit from my T1 doing ALL dialing into an 
ITEC first selector, then the selector outputs, which are all 
multiplied, connects to the respective connectors.
In effect, I have 3 linegorups with 3 sets of first selectors, digit 
absorbing, and 4 hundreds groups of connectors. The WE linegroup and 
first selectors are pulse only, the ITEC linegroup and first selector 
have built in TT converters, and the S-C linegroup and first selector 
also digit absorb.
Due to a shortage of tuits, ( round ones ) the S-C isn't yet fully wired.
EVENTUALLY, I plan on using the X-Y send section of selectors as 
incoming, both for Asterisk and K3200 trunk carrier
Probably more than you wanted to know about how I chose to wire up my 
switch, but from this you can see that IF you got a fast busy on 25xx, 
that was probably due to the mis pulse dialing.
Right now I can't seem to properly dial 2231 for a RNA every call from 
Asterisk, yet from my WE switch it always completes.

I also get this curious error message
Apr  1 11:44:33 WARNING[870]: chan_zap.c:4074 zt_handle_event: 
Ring/Off-hook in strange state 6 on channel 25

Because of my brand of T1 card, I am forced to use the govarion version 
of Zaptel
They have released a patch for future versions, however.
I really have no way of determining where the problem is, but for sure 
it isn't Russ and Max patches.

John Novack