The 1A2 Key Telephone System is a business telephone system developed and distributed by the Western Electric Company for the Bell System. The 1A2 Key Telephone...

the 1A, 1A1, 1A2 Key System, and the 6A, are typical examples and were sold for many decades. The Western Electric 1A family of key telephone units (KTUs)...

Southern (company), as the NYSE ticker symbol Key service unit or panel of the 1A2 Key Telephone System Kristiansund Airport, Kvernberget, Norway by IATA...

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...

or circuits that require many wire pairs, such as used in the 1A2 key telephone system. The miniature ribbon connector of this interface is also known...

dial pulse signalling to send the phone number. On 1A2 key systems or similar key-operated telephone instruments, the hold position, i.e., the hold condition...

for multiline phones such as the ITT 2564, key telephone systems such as the 1A2 Key System, and PBX systems. RJ11, by far the most common BS 6312, British...

Discontinued Avaya Switches 1A2 Key System (Electro-mechanical Key System made by Western Electric) DEFINITY BCS (Business Communications System) DEFINITY ECS (Enterprise...

used mainly in distribution panels where several destinations (often 1A2 key telephones) need to connect to the same source. The M blocks are often used to...

twisted pair cable of a plain old telephone service (POTS) local loop to the public switched telephone network (PSTN). Telephone line cards perform multiple...

Ringdown features are often part of a key telephone system. In the wire spring relay key service units of the Bell System 1A2, a model 216 automatic ringdown...