200 MMGJ Touch Tone PC Board
By Clint Gilliland, ; posted September 4, 2018; hits 789
| I have several white AT&T Technologies 2500 MMGJ sets MADE IN USA. They look like a standard 2500 other than they have a K-Type handset. This TT dial DOES allow single tone generation. Everything is on a single PCB, DTMF generation and network. The phone is so light that there is a heavy cast metal weight on the bottom. The TT dial buttons press conductive rubber dimples against a flat PC board. The contact pad is supported under the buttons by a hollow pedestal. The pedestal is part of the plastic base and the hollow is accessible from the outside (good hiding place).
Other numbers PEC 3101-EBD, Ser. 91337 1600. The ICs can be seen on the PC board photo. Date codes? Maybe 1991. |
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