[VoIP] More pulse dialing mysteries

[Russ Price]

Delving into the code, I noticed that zaptel.h naively uses a 50:50 
pulse make/break ratio (ZT_DEFAULT_PULSEBREAKTIME and 
ZT_DEFAULT_PULSEBREAKTIME are both set to 50 ms).

I tried using the US-standard 61:39 and UK-standard 67:33 ratios, and I 
found that pulsing was still accurate with the TDM400P card - but the 
Adtran FXO card got even worse.

Another thing I tried, which made no difference either way, was to 
configure the channel bank to generate the timing and tell the TE110P to 
use the channel bank as the timing source.

I'm not really a T1 guru, but I'm wondering if the way that T1 sends 
supervisory signals messes with the timing of the pulses?  I kind of 
doubt it, though, since FXS pulse dialing works just fine on the channel 
bank.

	Russ
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