[VoIP] Patches

Russ Price kxt at fubegra.net
Sun Apr 1 18:24:09 CDT 2007


ikjtel wrote:
> Sometimes I can hear what sounds like a pause or
> "burp" in what should be a regular rythm of pulses...
> 
> Has anyone been able to isolate whether this is due to
> :
> 
> * improper make/break ratio
> * version of asterisk and/or zaptel
> * version of driver
> * type of hardware in use (channel bank vs. x100p vs.
> tdm400; brand of channel bank), etc.
> * whether the "audible pulsing" patches have been
> applied or not

FWIW, my TDM400P's pulsing is audibly better than that from the Adtran 
FXO.  I don't hear any raggedness, and the make/break ratio sounds more 
appropriate on the TDM400P.

This has been true with Zaptel 1.2.16 as well as 1.2.7, both with open 
audio path.  I'm running Asterisk 1.2.17 here, with the open audio path.

The channel bank is an Adtran 750, with a 1175407L2 quad FXO card, 5 
quad FXS cards, and a 1175012L1 BCU, and the T1 card is a Digium TE110P.

I tried vanilla Zaptel 1.2.16 (no patches), and still got occasional 
misdials when pulse dialing into my Panasonic switch.

I also tried both B8ZS and AMI coding, and D4 and ESF framing, and they 
made no difference.

	Russ
	CNET: 1-442-7877
	FWD: 699408


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