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13:41 Aug 27, 2014
English to Spanish translations [PRO] Tech/Engineering - Telecom(munications)
English term or phrase:dynamic rest channel
Aparece en el contexto de descripción de soluciones de radio: "XXXXX is an innovative trunking architecture that uses a dynamic “rest channel” for maximum efficiency"
Reference information: A Capacity Plus system has no system controller (which LTR, MPT1327, P25 etc all have), it is simply a network of up to six voice/data repeaters connected together (with the option for additional data only repeaters).
Unlike LTR, there is no home channel. When all radios are in an idle condition, they all sit on what's called a "Rest Channel." (We'll call it repeater A.) The Rest Channel can be identified by the rapid "Beacon" data burst approximately every 2 seconds I mentioned in the previous thread. When a user keys up a talk group, every other idle radio NOT on that talkgroup is told by repeater A to go to a NEW rest channel (on a different frequency called repeater B for this example), and only the originating radio and the other radios on its same talkgroup are allowed to stay. Then repeater A "converts" itself from being a rest channel to being a voice channel. When the voice transmission is complete, repeater A tells all radios on that talkgroup to return to an idle condition and join all the other idle radios on the new rest channel, repeater B.
Presumably there can only be one rest channel at a time, so if while repeater A was busy with group 1 and group 2 wanted to key up repeater B, the remaining idle radios would be sent to repeater C (and everyone would eventually end up there upon termination of the voice transmissions on A and B). Further assuming, if a third group tried to key up C but there was no extra repeater available a system busy condition would eventually result. Obviously multiply the preceding example by 2 to account for both TDMA voice channels per repeater.
I believe we have been looking in the wrong place (the CSBK frames during a voice call). My GUESSES:
1.) That channel grants are controlled by CSBK data frames preceding every voice call. There could be multiple types. Maybe one to ACK the request for a channel grant, one to assign all non-participating idle radios to change to the LCN of the new rest channel, and one to indicate the conversion from rest channel to voice channel (talk permit).
2.) Voice calls must be followed by CSBK data frames telling the radios to return to an idle condition and switch to the LCN of the new rest channel (where all the other idle radios were sent).