1A2 Key Phone Systems
Table of common 1A2 Key System phone model#'s
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Model 2564 - 5 Line Touch-Tone PhoneThis phone is often referred to as a '6 button' phone; one hold button and 5 line buttons. The phone's cable is a standard 25 pair (50 pin) male Amphenol. Phone includes a built-in bell ringer (rings on ~90 VAC/20 - 30Hz) and buzzer (~10 VAC/60Hz) that have their own dedicated wire pairs. The 2564 is very similar to the 2565, but does not support speakerphone; subsequently the violet pairs are not present on the WE 2564 cables, keeping the station cable lighter and more flexible by having less conductors. Also, the 2564 has all the LG (Lamp Ground) conductors bussed together inside the set, whereas the 2565 has LG signals isolated (not bussed).
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| 2564 |
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Model 565 - 5 Line Rotary PhoneSimilar to the 2565, but rotary. This phone predated Touch-Tone technology, the rotary dial briefly interrupting the current flow across the tip and ring pair to directly drive the central office's solenoid switching equipment to count out dialed numbers on strowger switches. This phone is often referred to as a '6 button' phone; one hold button and 5 line buttons. The phone's cable is a standard 25 pair (50 pin) male Amphenol, with unused wires usually spared out inside the phone. Both the 565 (rotary) and 2565 (Touch Tone) support speakerphone options, and include all the violet pairs for this purpose. Phone includes a built-in bell ringer (rings on ~90 VAC/20 - 30Hz) and buzzer (~10 VAC/60Hz) that have their own dedicated wire pairs. The 565 is similar to the 564, but supports 4a speakerphone option with all violet pairs, whereas the 564 does not. Also, in the 565 and 2565, all LG (Lamp Ground) signals are isolated, and not bussed inside the phone.
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| 565 |
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"Call Director" Model 2636 - 17 Line Touch-Tone PhoneThis is a Touch-Tone version of the older rotary 536 Call Director. These models are relatively small (compared to the 2830) given how many lines they manage. These phones were intended for receptionists, or situations where more than 5 lines are needed. These phones often showed up in movies, politics Johnson / Reagan / Bush , and numerous television shows made in the 1960's and 1970's.
(credit: In the above, "Politics" photos from www.manufacturediscontinued.com) |
| 2636 |
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Model 2830 - 9 Line Touch-Tone PhoneThis phone is sometimes referred to as a '10 button' phone; one hold button and 9 line buttons. The phone's cable is a standard 25 pair (50 pin) male Amphenol, with unused wires usually spared out inside the phone. Phone includes a built in ringer (rings on ~90 VAC/30Hz) and buzzer (~18 VAC/60Hz) that have their own dedicated pairs. A small screw inside the phone on the hookswitch lever can configure whether hanging up the phone causes the last-selected line buttons to automatically pop-up, or remain down. A separate control box, known as a "KSU" is needed to manage the lines, lamps, ringing and hold circuit. |
| 2830 |
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ITT Model 2861 - 30 Button PhoneThis is a Touch-Tone 30 button set made by ITT. WECO made the 10 button (2830) and 20 button (2831) versions of this phone, but for whatever reason ITT handled manufacturing the 30 button version. So you won't find this phone in the Bell System Practices; you have to look in the ITT TIMM for the 2861 schematics + wiring practices. These phones were intended for receptionists, and were often used at radio stations to handle numerous call in lines. These phones have 150 conductor cables with 3 amphenol connectors at the end of the cord. |
| 2861 |
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WE Model 851 - 5 Button Wall PhoneThis is a 5 Line rotary wall phone. The phone does not come with its own cable, the intention being the phone's station cable come from the KSU threaded through the building, and fed in from the back through a hole in the wall.There's two variations of the internals of this phone; one that accepts the backfed cable with an amphenol connector end, the other accepts a bare-ended cable to be punched down on an internal punch block inside the phone. |
| 851 |
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Northern Telecom (NT) LOGIC-10This is a 1A2 compatible 10 button set manufactured by Northern Telecom (Canada), supporting 9 lines. It has a slanted front similar to the Com Key sets, and was a very popular multiline desk phone. It came in other line configurations including 5 line (LOGIC 6), 9 line (LOGIC 10), 19 line (LOGIC 20) and various add on features such as speakerphone, adjunct button fields, cabling options for NT specific or WE/ITT compatible configurations, and was available in both rotary and touchtone dials. |
| NT LOGIC-10 |
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Com Key 416 - Multiline PhonesThis phone is not a 1A2 system, but it is from the same era. Com Key 416 is a 4A phone system that was released in 1975, and has many features the older 1A2 phones don't have. The Com Key 416 phones are standalone-alone system that don't use a KSU, and are not at all wiring compatible with 1A2.
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| Com Key 416 |
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KS-19252-L1 "C-P-C" Amphenol BridgeThis device is not a phone, but used for connecting multiple 1A2 phones in parallel on a single 25 pair wire run by chaining M-F ended 25pair cables using these boxes at each point where a phone needs to be.The device itself has a single male plug connector ("P") surrounded by two female connectors ("C"), making it possible to chain these devices with M-F cables. The M-F cable would started at the KSU, its male end attached to the KSU's female connector, and the female end would connect to the center connector on this device. The male-ended phone connector would connect to one of the female connectors on the device, the other being available for another M-F cable to chain on to the next device. See the wiring diagram on this page for an example of how to use these. They are also used for chaining ComKey416 phones.
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KS-19252-L1 C-P-C |
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66E3-25 Connection BlockThis device is not a phone, but used for wall or floor mounting connection points for 1A2 phones. 25 pair cables run through walls can be terminated at one of these "decorative" blocks by punching down the wire on the block, and connecting the phone to the pre-wired amphenol connector on the block, and then putting the decorative cover over the assembly, making for a nice termination point.These blocks can also be chained; the punch block provides secondary lugs to chain to the next phone connection point. In this way raw 25pair cable without amphenols can be used to connect the blocks together behind walls or through ceilings/floors in an office or residence. See the diagrams on this page for examples of how these flexible blocks can be utilized.
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| 66E3-25 |
