TMC Radio SRP 9100, Руководство по обслуживанию

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2 ~ SERVICE PHILOSOPHY
If inhibited from transmitting a Selcall sequence because the channel is busy then
the radio can queue the Send 1 / Send 2 sequence for later transmission. When a
radio unit is in Queuing mode all incoming calls are stored automatically in a
queue for later examination. The caller is given an indication that the call has been
queued by the called party. The queue will contain the identity of the caller and the
status value received (if a status call). Up to 20 calls may be queued. The Queuing
mode may be selected using the Modes Menu.
Note: Connecting a MAP27 device to a radio that is in queuing mode will disable
queuing. All incoming calls will then be routed both to the radio user interface and
to the MAP27 device connected to the radio. Also known as Logging Mode
Reference Frequency Normally this is generated from a high stability crystal oscillator reference and is
divided digitally in a frequency synthesiser for comparison with other frequency
sources, e.g. a VCO.
Registration
Registration is a technique used to ensure that the trunking system knows the
location of radio units that are using the system. This allows the system to set-up
calls quickly without having to search the whole system for the called radio.
Repeat Tone A selcall tone that is used to replace repeated tones. Fixed at tone E.
Example: An identity entered as '12333' would be sent by the radio as '123E3'.
Reset
Resetting is caused by Three Tone Reset, a Remote Reset, and an Individual
reset or a Group reset (Call Types in Decode Identity). When a radio is reset the
effect on the radio will be as follows:
•
Any Call Alerts will be stopped
•
The Call LED flashing will stop
•
If the channel is in Open mode then the channel is closed
•
The PTT is optionally inhibited (see PTT Inhibit After Reset Sequence).
•
In searching - if paused on a Selcall channel then searching resumes
•
If the Acknowledge property of a Decode Identity is set to 'Auto Interrogate' or
'Transpond & Auto Interrogate' then the Auto Interrogate encode identity is
transmitted.
Roaming
This is a process that allows changing between regional trunking systems which
have different Operator Identities (OPID 's). Not allowed on MPT1343 Systems.
RSSI Received Signal Strength Indicator.
Scanning Process of switching between the channels in the nominated search group in
cyclic sequence, stopping when the search condition (which may be to look for
either a free or a busy channel) is satisfied.
SDM Short Data Message.
Selcall Selective Calling - a system of signalling which allows 'dialling up' of specific
mobiles, portables and controllers. Such a system may be used to pass messages
as a data message to a specific user or group of users. It can be used to provide
remote switching facilities and to provide access control into community repeaters
or similar devices.
Selcall Mute A state of the audio gate whereby the loudspeaker is muted (closed).
Selcall System Selective Calling, uses a tone sequence at the start, and end, of a call to control
which members of a fleet react to the transmission.
SFM
Short Form Memory.
Sidetone Sidetone is the audio which can be (optionally) heard when Selcall, DTMF and
toneburst transmissions are made.