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From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: net.followup
Subject: Re: Need help converting an old phone.
Message-ID: <788@kitty.UUCP>
Date: Mon, 3-Feb-86 19:06:04 EST
Article-I.D.: kitty.788
Posted: Mon Feb  3 19:06:04 1986
Date-Received: Tue, 11-Feb-86 03:11:43 EST
References: <1910@cbsck.UUCP>
Organization: Recognition Research Corp., Clarence, NY
Lines: 52

>      An aquaintance of mine has asked for some advise on converting an
> antique phone he has in his shop into a working, non-dialout extension.
> I have not yet seen the beast, but he tells me that it is an old crank-
> generator-and-battery-style telephone built by the Kelloggoo(?) company
> of Chicago and patented in 1901.

	That's Kellog, a predecessor of ITT.

>      From what little I know (or think I know) about telephones, I told
> him he would probably need a network (is that what they call that little
> box with all the screw terminals on it?) and a bell.

	Yes, you want a 425-type network, sold as a replacement part by
ITT, Northern Telcom, Comdial (Stromberg-Carlson), etc.  A ringer from a
"Trimline"-style telephone set would be easiest to install.

>      1.)  How do we implement the switchhook functions (and by the way,
>           just what are these functions)?

	The switchhook merely has to open one side of the telephone line.

>      2.)  Will the original microphone and speaker work?  Since I
>           haven't seen the phone yet, replacing them could range from
>           trivial to impossible.

	Assuming you have a carbon transmitter and electrodynamic receiver,
you should be okay; however, if the impedance and DC resistance of the original
elements is far off from today's 500-set counterparts, then you may be in
trouble trying to use a 425-type network.  If it is necessary to replace the
transmitter and/or receiver, a good source for some small (and therefore easy
to install in another enclosure) elements would be an old 52-type operator
headset.

>      3.)  With no dialing mechanism connected to the network, will the
>           phone still work in an answer-only mode?

	No problem.

>      4.)  Is there anything I am overlooking?

	You should be able to buy a 425-type network from a Graybar Electric
store, or other wholesale telephone distributor; or, you can scrounge one from
an old telephone.  You also need a wiring diagram from a 500C/D-type telephone
set to help you install the network.  Such a distributor should be able to
help you.

==>  Larry Lippman @ Recognition Research Corp., Clarence, New York        <==
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