Panel - Decoder Frame
By Ken Martin, ; posted March 9, 2006; hits 1191
| Pictured is a Panel Decoder Frame (1933). The Decoder itself was made up of a couple of bays. On the left bottom are the control relays behind the doors. Above that and at the bottom of the right frame are more control relays. The frame on the right contained the translation matrix (note all the short jumpers wired to the various control banks). In other words how to process any of 800 possible code points. The average holding time for this during a call was about 1.5 seconds. An average C.O. had 3 or 4 Decoders. A failure in any decoder would cause a Major alarm and light lamps on the trouble indicator panel along with a loud audible alarm. Note top right of photo 4 alarm lamps. Not show here are the Decoder Connector relays. They can be found on the Sender photo. In Panel the Decoder was similar to the Marker in Crossbar when decoding dialed numbers. |
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