Open information
DESCRIPTION
7 (14)
Uppgjord (även faktaansvarig om annan) -
Prepared (also subject responsible if other)
Nr
-
No.
KL/ECS/S/MK Magnus Lindahl
MRS3000 Overview
Dokansv/Godk -
Doc respons/Approved
Kontr
-
Checked
Datum
-
Date
Rev
File
KL/ECS/S/MK
1997-04-16 A
LZB 119 1661
OVER.DOC
System
functions
Listen 1
When the line is busy, any CU can listen to the traffic by just opening the loudspeaker or lifting the
handset. If the loudspeaker is opened, the actual route is shown just to the right of the loudspeaker
symbol. By pressing |
Ü
| the operator can make a break through and talk to the mobiles (if 2 wire
connection also the other CU’s can hear him).
Outgoing tone calls can't be made when listening in this way.
Listen 2
If mobile-mobile traffic is in progress, a CU can take control of the call by choosing the actual route and
pressing the |Listen| key. The loudspeaker symbol flashes. The other CU’s indicate LINE BUSY.
The CU can now also transmit tone calls to mobiles. When any outgoing calls are cleared down, the CU
returns to listening.
By pressing |-/-|, a DISCON call is transmitted, and all mobile - mobile traffic is cleared down and the
behaviour becomes equal to what is described below, under Listen 3.
If mobile-mobile traffic hasn't been cleared down, and |Listen| is pressed once more, the mobile-mobile
traffic just continues.
Listen 3
If the base is free, by choosing a route and pressing |Listen|, a CU can lock the radio on a channel.
The loudspeaker symbol flashes. Incoming calls to the CU are accepted and outgoing calls can be
made. The other CU’s indicate LINE BUSY.
By pressing |Listen| again the radio becomes free again.
Prior to this all-eventual incoming/outgoing calls must be cleared down.
Open traffic
Each operator can choose open traffic channels. In the personality the maximum number of open traffic
channels for one CU and the total maximum number of open traffic channels for the base are specified.
If squelch is detected on an open traffic channel, the base will lock on the channel as long as squelch
indication remains, the loudspeaker opens and the actual route is displayed on the CU’s that have
chosen the channel for open traffic. If any operator presses |
Ü
| while locking on an open traffic channel,
this CU becomes 'in charge' and the other CU’s indicate LINE BUSY.
The CU in charge clears down the call by pressing |-/-|.
The behaviour at open traffic will be different if your system is personality programmed as a BFS
system. In this case no CU becomes 'in charge' by pressing PTT in open traffic and the system stays in
open traffic after PTT is released.
