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SmarTrunk Vs LTR
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SmarTrunk Vs LTR
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| The following table summarizes some of the major similarities and differences between SmarTrunk II and LTR |
| Feature / Specification | SmarTrunk II | LTR |
| Type of voice modulation | Analog | Analog |
| Subscriber equipment | Conventional two way
radios equipped with add-on logic boards |
Specialized LTR subscriber radios |
| Types of signalling | Digital BPSK audible
databrust at call setup |
Continuous sub audible digital signalling |
| Method of trunking management | Mobile scan based | Home channel controlled |
| Channel acquisition | Call takes place on
one ch after initial setup |
Radios acquire a new ch after each PTT |
| Initial call set-up time | Approx. 1-3 seconds | Approx. 300 milliseconds |
| Subsequent PTT access
time during the same call |
Instantaneous | Approx. 300 milliseconds |
| Home group dispatch | Push to talk (PTT) access | Push to talk (PTT) access |
| Individual selective calling | Yes | Limited - each call must be
pre- programmed |
| Telephone interconnect | Yes | Optional |
| Secure against system
pirates or unauthorized use |
Yes | No |
| Co-channel tolerant | Yes | Limited - home channels must be assigned to clear channels |
| Can operate in
parallel with a conventional tone panel |
Yes | Limited - Home channels cannot support parallel tone panel operation |
| Group inhibit | Yes | Yes |
| Selective calling inhibit | Yes | Limited - must be pre-programmed |
| Call record accumulation | Yes | Yes |
| Number of different
subscriber IDs per system |
Up to 4,096 | Up to 250 per home channel |
| Remotely Disable Individual Radios | Yes | No - Groups only |
