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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: 18 Aug 1992 21:09:46 GMT
- From: rnewman@bbn.com (Ron Newman)
- Newsgroups: comp.dcom.telecom
- Subject: What Does This "Western Electric" Box Do?
- Message-ID: <telecom12.641.5@eecs.nwu.edu>
- Organization: Bolt, Beranek & Newman, Inc.
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 641, Message 5 of 13
- Lines: 56
-
- I moved into a new apartment this weekend, and found a mysterious box
- plugged into an electric outlet, with wires running into a telephone
- junction box. Various writing on the box reads:
-
- Western Electric
- 2012C Trnsf.
-
- PRI: 105-125V 60Hz
- 4.7 VA MAX
-
- SEC: 6-8V 1.75 VA
-
- CAUTION
- INDOOR USE ONLY
-
- UL Listed Class 2
- 786D Trnsf.
-
- OK, it's some kind of electric transformer. But what is it for, and
- why is it there?
-
- I unplugged it from the wall and unscrewed the wires in the junction
- box, my phone service seems unaffected. All of the phones still have
- dial tone, all of them still ring.
-
- I called New England Telephone, but neither the Business Office nor
- the Repair Service knew anything about it. One person suggested that
- it was a step-up transformer that was needed to power a Princess phone
- with lighted dial. But I have an AT&T Trimline phone, and its dial
- still lights up just fine without the transformer plugged in.
-
- Anyone know more?
-
-
- Ron Newman rnewman@bbn.com
-
-
- [Moderator's Note: It is indeed a transformer to light the dial on a
- Princess phone ... a style long since replaced by the Trimline models.
- The reason you do not need it on the Trimline is because instead of an
- actual little light bulb under the case of a Princess phone, the newer
- Trimline model uses LED's under each push button and they light up
- from line voltage, eliminating the need for an external source of
- power to light the dial. On the old Princess models, the light, being
- independently powered from the transformer you have via the second
- pair of wires in the cord to the phone did not go out when you punched
- the buttons as it does with the newer Trimlines when you momentarily
- steal the voltage to send tone signals. Did you ever see a *two line*
- Princess phone with a turn-button to select the line? It had four
- pairs of wires coming in: one pair for each line, one pair to
- illuminate the flashlight size light bulb, and a fourth pair to handle
- the momentary press down/release turn button to signal another station
- when one line was used as an intercom. Talk about a mess of wires
- inside the little tiny plastic housing! PAT]
-
-