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Originally posted by JWRacedog:
Well--no--not every phone system. In fact, only a very few can be hooked up according to your PDFs. Even larger system need to sometimes have extra slots to "cover" the extra trunks coming in on the T-1s---thereby needing extra cabinets or whatever.

If a customer won't allow you to see what the PBX translations are (like merlinman suggested) then your customer is making a decision that flat out dog-locks you in doing your job. You'll have to find a way around that one.
You're correct, the phone systems have to be upgraded often, extra cabinets put in etc... The size of the dialer makes a difference as to how and what needs to be upgraded.

Yes that does suck about customer not releasing info to us - their vendor - the guys that have access to account numbers, SS#, names and address and debt balances. Doesn't make sense. Its often the IT King trying to keep the keys to the kingdom.