> We're
> talking about how 2 fully digital units talk together and there the answer
> has to be: digital is better than analogue.
You're sure? I have three PRI's. One is refusing to function correctly with our
Nortel Meridian 1 option 11C PBX. All three start from the same 5ESS, the same
same modem-card, run through one cable to our location, terminate on the same
patch-panel. All three have been extensively measured, and are all well within
specs, for any parameter you'd like to measure. Noise, resistance, complex
impedance etc. The modems over here have been exchanged, tested, and so
on. But using line A on the 11C means losing sync, three, four, five times a
week, losing all active calls. Using the same line on a PM3 works like a charm.
Using lines B or C on the C11 works equally fine. It just refuses to work with
line A. We've had *anybody* from the telco and Nortel who knows anything about
ISDN over at our site, and nobody can give anything remotely close to an
explanation.
Please repeat your 'digital is better' mantra a couple of times. You might get
doubtfull, after reading such a story, to which some of you can really relate,
and lose the faith ;>
These are digital interfaces, talking through digital protocols, over a digital
line. Any difference between the lines is so small, it's hard to measure.
Despite that, it simply does not work.
I'm not saying digital is bad, or that analogue is better. I'm just saying
digital is not better because it's digital. And it can be more apropriate in
many situations.
--Ruben
_VuurWerk Internet____________________________________
Gedempte Oude Gracht 82-e e-mail: ruben@vuurwerk.nl 2011 GV Haarlem telefoon: 023-5111 111 fax: 023-5111 115 ________De Hosting Specialist_________________________
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