E.F. Johnson Company 5100 ES, Operating Manual

Page: 141 / 212

ES Series Models II/III Portable Radio Operating Manual 7-5
Multi-Net Features
e
Block ID codes
For example, if a call is being received on selectable ID 223 and a call is detected on fixed
priority ID 2, the call on selectable ID 223 is immediately dropped and the radio switches
to the call on fixed priority ID 2. When a call is detected on fixed priority ID code 1,
is
indicated in the display. Likewise, when a call is received on priority ID 2, is
displayed.
The selectable ID codes are checked to see if any are the same. If a match is found, the
transceiver changes to that group. If no match is found, it does not change and a response
cannot be made using that ID code. A radio transmitting cannot be interrupted.
With Multi-Net operation, incoming call information is received on both the status
repeater and the repeater to which the subscriber unit is trunked. Therefore, a priority call
is not missed even when some repeater other than the home repeater is being used.
With Multi-Net operation, Interconnect and Unique ID calls may interrupt standard calls
and Fixed Priority 2 calls. Refer to Section 7.10 for more information on special calls.
7.2.3 Access Priority
The priority access feature allows users that have a greater need to communicate, access to
the system first. There are five levels of priority, with 1 the highest priority (reserved for
emergency transmit) and 5 the lowest priority. Each repeater determines the current
priority level using an algorithm that is selected by the programming of the main processor
card. The access priority information is then transmitted in the data messages to the
subscriber units monitoring that repeater.
When a radio is programmed, a priority level between 2 and 5 is assigned to each channel.
If the priority level transmitted by the repeater is higher than that programmed for the
selected group, a busy indication is produced when the PTT switch is pressed and the call
cannot be placed at that time.
7.2.4 System Authorization
With Telephone calls, system authorization is also required before service is available.
This authorization is performed by the system operator using the System and Subscriber
Manager (SSM) of the 3000 series Switch. This authorization also determines what type
of service is available. For example, a subscriber unit may be authorized to dial local
numbers only. This authorization is keyed to the radio’s unique ID which is transmitted
when any call is made.
2