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This is a Melco M-628 Power Supply. It is battery-operated power-supply that simulates CO battery and local lamp transformer power in modular station installation. An installer uses it with the M-626 tester and or M-627 ground switch tester to verify correct installation wiring. It has two 4-wire modular jacks on the front and a 4-wire screw terminal strip labeled "Grn, Red, Blk, Yel".Also, has a LED to incicate "T & R Short". The Melco M-628 uses 2 of any of the following Batteries: This was used for Bell System installers and repair technicians in the late 70's. Great item for testing or for the telephone man collector! (all content is the responsibility of the poster) |
vickiehays@oklahomaselltoday.com (Vickie Hays) for more information. All emails will be forwarded to the poster's actual email address.