AT&T Merlin
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AT&T Merlin is a corporate telephone system by American Telephone and Telegraph that was introduced in late 1983, when it was branded American Bell Merlin. After the breakup of the Bell System in 1984
AT&T Merlin five-button telephone (voice terminal) manufactured in early 1980
A Merlin Legend system in an office building. There is at least electrical pin-compatibility between the Magix and the Legend, as a Magix DS1 board (colored grey) can be seen installed in this system.
Merlin Colors
AT&T Merlin RJ45 Pinout
Business telephone system
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A business telephone system is a telephone system typically used in business environments, encompassing the range of technology from the key telephone system to the private branch exchange.
AT&T Merlin
…dedicated, password-protected computer terminal continuously connected to the RS232 serial port to the PBX. The default password was systemx5. The 1A2 Key Telephone System and later ComKey series (4-16, 7-18, 14-34) had the following problems which the Merlin system sought to solve with a microprocessor design: Complex…
Early-1970s Telephone Exchange model TESLA Automatic system
Early model 464G Western Electric key telephone set
A 1930s key telephone for a private branch exchange
Nortel T Series Key System Telephone