Paul,
following on from Duane's reply, here in UK, we found a number
of different protocols to show a message waiting if is is any use,
different manufacturers having different ideas. Essentially, there seems
to be no standard as such:
1) an interrupted or different sounding dial tone
2) a short ring chirp every X seconds
3) normal battery voltage reversed
4) battery over voltage to 100V
5) there are probably several others
Some manufacturers set this globally - all extensions use the same
method, some allow individual extensions to use different methods.
There seems no standard other than the manufacturers own engineering
specification.
We found a manufacturer has a vested interest in not telling other
people how he indicates message waiting as he can then sell his own
dedicated system phones to go with his PBX......it is a little difficult
to keep it secret though!
Perhaps if you have a specific PBX in mind the manufacturer will liaise
with you.
regards
Gerrard
In message <v03007800b252f2e01fd7@[168.75.97.36]>, "Duane J. Marcroft"
<[email protected]> writes
>>Hello everyone,
>>
>>I'm still in search of a contact or information leading to a standard for
>>Analog CPE protocol for Message Waiting Signals from a PBX System.
>
>Paul,
>
> The information your are asking for is proprietary. As a consequence not
>available to the general public.
>
>I'm hard pressed to believe there is a such a thing as a Standard PBX
>System. My past experience with several different companies indicates
>there is not much comminality between manufactures.
>
>Although I believe some time in the past Vic Boersma stated he was part of
>or knew of a group that drafted a document describing a common approach to
>implementing a PBX. Which incuded Message Waiting. Due to the nature of
>competition I'm not sure any companies adhere to it. If they did I doubt
>they would tell you so.
>
>Duane
>
>
--
Gerrard Smallwood
Triton Communications Ltd. Tel: +44 (0)117 9477123
Willcock House, fx : +44 (0)117 9477637
Southway Drive, Email: [email protected]
Warmley, Bristol.
BS15 5LW. Uk.
