I am installing a NEC DSX-40 and the Call Forward Off premises feature requires that "telco must provide Loop Disconnect Supervision" (pg 51 of DSX Software manual).
My Problem; the local telco customer rep and the sales rep both say "Huh?".
They are checking with engineering and I gave them what I think are other names for this (Calling Party Control, CPC Wink, Loop Current Disconnect Supervision) but I am wondering;

***What kinds of incoming lines will a DSX-40 support; loop start only?
I also think the lack of calling party disconnect might be causing a very long hang on auto-attendant/voice mail (1-2 minutes). I only saw it once though in a quick test.

***What kinds of disconnect supervision will the NEC DSX-40 support?

***Is there an industry standard type of loop start that I should be asking for?

BTW the local telco is Frontier, Rochester, NY.
Thanks,
GR