E.F. Johnson Company 5100 ES, Руководство по эксплуатации

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ES Series Models II/III Portable Radio Operating Manual 3-15
General Operation
When a SMARTNET or SmartZone channel is selected or the radio is powered up on one
of those channels, the alias (name) of the selected channel is displayed as the radio
searches for a control channel. Once a control channel is found, the radio attempts to
register on the trunked system. If a control channel could not be found (because of an out
of range condition or the system ID is not correct, for example), “No Sys” (early units) or
“Out Of Rnge” (later units) is displayed and the radio continues to search for a control
channel.
The control channel transmits and receives system information to and from all radios
registered on the system. Therefore, once a control channel is found, it is continuously
monitored for incoming call information and is used to make call requests. The radio
automatically changes to a traffic channel to place and receive calls and then returns to the
control channel when the call is complete. Operating features unique to SMARTNET/
SmartZone channels are described in Section 6.
3.9.3 P25 Trunked Mode
The P25 Trunked operating features are very similar to the SmartZone type just described.
Since SmartZone features are also similar to SMARTNET features, all three modes are
described in the Section 6. Some differences between the P25 Trunking and SmartZone
modes are as follows:
• Digital signaling is always used with P25 calls. Either analog or digital signaling may
be used for SmartZone calls.
• Calls made to a specific radio in the P25 mode are called Unit Calls. In the
SMARTNET/SmartZone mode they are called Private Calls.
• Messaging is not available with P25 calls.
• Telephone calls are available
• The P25 control channel data rate is 9600 baud and the digital voice data rate is also
9600 baud. With SmartZone operation, the control channel data rate is 3600 baud (both
digital and analog calls) and the narrowband digital voice data rate is 9600 baud.
• The P25 mode uses a system ID, Wide Area Communications Network (WACN) ID,
and RF Subsystem ID (RFSS). The SmartZone mode does not use the WACN and
RFSS IDs.
• P25 Unit IDs can be 1-16,777,215 (000001-FFFFFF hex) and SmartZone Unit IDs can
be 1-65,535 (0001-FFFF hex).