Wide Area System Operation (Optional); Prosound; Telephone Interconnect; Base/Unit Operation - Ericsson EDACS MDX Operator's Manual

Mobile radio

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Wide Area System Operation (Optional)

This function applies when your systems are networked together in a

multi-site configuration. In this mode, your calls are automatically routed to

the proper system. You may notice a delay when you press the PTT button

while the system is connecting the correct sites. The BSY indicator will be on,

indicating you are on the voice channel. In this mode, you can release and press

PTT again to override the delay. This gets you onto the system, but does not

guarantee that everyone will hear the message.

When in the multi-site mode, your radio may be programmed to look for

alternate systems when you go out of range of the currently selected system.

If an alternate system is found, the radio locks onto the system and

automatically selects the correct information for this new system. Alternately,

the radio may be programmed to revert to a conventional channel when out of

range of the trunked system.

Each trunked system may also have a priority trunked system associated

with it when set to a system with a priority system programmed, the radio

periodically checks for the priority system. If found, it automatically switches

to that system. The timer is reset every time the PTT button is pressed to avoid

interrupting a conversation.

The radio may be programmed for ProSound system scan operation for

multi-site applications. ProSound scanning is an enhanced replacement for

wide area system scanning. This algorithm insures that the radio continually

receives high quality audio. When the selected system degrades to a

pre-programmed level, the radio begins searching for the best adjacent system

on a part time basis. Once a better system is found, the radio changes to the

new system and sounds a tone. Should the control channel be lost completely,

the radio will scan the adjacent systems until a suitable one is found.

This feature allows you to initiate preprogrammed Special Calls or receive

telephone calls through your radio if the system is configured for this operation.

This pre-programmed option is used in some fleets so units can only hear

and talk to a base dispatch unit, not to other radios in the group. In this mode

of operation, when a radio in a particular group is talking to the base dispatch

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