>Hello, and thanks for reading this. I'm the moderator of The Telecom
>Digest: for those who havne't read it before, it's an online e-zine
>that appears on Usenet as comp.dcom.telecom. I've Just joined the
>group, and I hope I'll be able to contribute a lot, but my first post
>is one asking for your help.
>This is an unusual question, so please bear with me.
>Once of the Digest's readers has asked for help interfacing a "Local
>Battery/Local Magneto" PBX with the PSTN, and I'm trying to think
>"outside the cubicle", and come up with a solution that doesn't
>require spending a lot of money.
>Here's the situation: there's a rustic vacation setting in Verizon
>territory, where every cabin has an honest-to-god wall phone with a
>magneto crank on the side and a battery in it to power the
>microphone. Yes, pretty much every image of Ma & Pa Kettle applies.
>The cabins are connected to a central cord board, which is, literally,
>the telephone exchange for every building on the property, and which
>_also_ has a magneto and batteries for the operator's headset: just
>imagine a 555 board with a magneto on the side (in fact, that used to
>be an option for 555 boards). The cabins signal the operator with the
>magneto, by cranking the handle when they want to talk to another
>cabin or the office, the restaurant, etc. The operator does the same
>for calls between the cabins (or restaurant, etc.), i.e., (s)he cranks
>the magneto on the switchboard to ring the phone at the destination
>phone. After a call is completed, one of the stations "rings off",
>i.e., cranks the magneto to activate the "drop" flag on the operator's
>console, so that the operator knows it's time to disconnect.
>Now, you're probably wondering why anyone would use such a setup, but
>AFAIK this is a real place, and the equipment is really there and in
>use every day. The Telecom Digest reader I'm trying to help says the
>strongly that the "crank" phones add a distinctive charm to the cabins
>and create an "old timey" atmosphere which is good for business, so
>they are determined to keep the existing equipment. However, they need
>to be able to route calls from the outside world to their cabins, and
>want to be able to originate calls from them, so my reader asked for
>help in finding out what's possible.
>Ergo, I have these questions, and I'd like to hear from Central Office
>technicians and engineers.
>1. Are central office dial tone circuits capable of accepting ring
> signals from a magneto PBX? In other words, if the PBX in question
> is attached to a dial tone "trunk", and the operator cranks the
> magneto, is the CO capable of connecting the call to a Verizon
> operator? (I know this *can* be done, because I once accidentally
> cranked a magneto on a surplus field phone that was connected to a
> dial tone line, and an operator answered, but the question is if it
> is a regular feature of common central office equipment.)
>2. Are the CO's Verizon uses capable of supporting "Ring down" trunks?
> Assuming that an ordinary "PBX trunk", i.e., a dial tone line,
> can't work on a ring-down basis, could Verizon option a circuit
> so that it can be done? I'm thinking of "manual service" lines used
> by paraplegics and others who can't dial a call.
>3. Assuming that options 1 or 2 aren't available, what "work around"
> is available that would allow the 555 PBX to interface with the
> PSTN despite it's lack of DC supervision and the need to use
> ring-down signalling?
>Thanks for your help.