Ericsson MRS3000, Руководство по обслуживанию на месте

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8 (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
Locked channel
By choosing a route and pressing |Lock| |#|, a CU can lock the base to a channel. The base will work as
squelch controlled repeater on the chosen channel. The loudspeaker symbol at the locking CU will
toggle between filled and empty symbol, and the other CU’s indicate LINE BUSY. Incoming calls to the
CU in charge are accepted. Outgoing calls can be transmitted from the CU in charge.
Other CU’s can just listen and break through.
Before leaving the locked channel state, by pressing |Lock| |*|, all incoming and outgoing calls must be
cleared down.
BFS mode
By choosing a route that is defined as a BFS route and pressing |Data| |#|, a CU210 starts the channel
in BFS mode. If there is any other traffic going on, it is disconnected. Observe that a CU200 cannot
initiate BFS mode, it needs to be done from a CU210. The loudspeaker symbol on the CU in charge
flashes while the other CU’s indicate LINE BUSY. The LF from two radio channels are mixed together
and transmitted to the CU’s. All CU’s can listen on the traffic, but only the CU in charge can transmit by
pressing PTT.
If repeater traffic is enabled in the channel setup (personality programming), tone calls can be
transmitted. If repeater traffic is enabled on the channel and the 'R' is visible in the display, squelch
controlled repeater traffic is in progress. It is disabled by pressing |Repeater| |*|, and enabled by
pressing |Repeater| |#|.
No tone calls are received when in BFS mode.
Repeater traffic enable/disable
Each CU can enable/disable repeater traffic over the base. An ‘R’ indicates the actual state in each
CU’s display. If repeater traffic is disabled when mobile-mobile traffic is in progress, the call is cleared
down.
Isolated base
If the base loses contact with all CU’s, it is isolated. In this case it can work as tone- or squelch-
controlled repeater, personality programmable on each channel.
Transfer
Incoming call to a CU can be transferred to any other CU, mobile or a telephone number. Only individual
calls are transferred to mobiles and to telephone numbers. Observe that transfer to other mobile is not
affected by repeater traffic enable/disable. If, however, repeater traffic is disabled during the call, the call
is cleared down. If the channel is simplex and transfer to a mobile is requested, a tone call is transmitted
to the mobile, but no traffic is connected.