Ericsson MRS3000, Руководство по обслуживанию на месте

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Uppgjord (även faktaansvarig om annan) - Prepared (also subject responsible if other) Nr - No.
KL/ECS/S/ML Magnus Lindahl MRS3000 Telephone interface version
Dokansv/Godk - Doc respons/Approved Kontr - Checked Datum - Date Rev File
KI/ECS/S/MLC 1997-01-14 E LZB 119 1661
TELE.DOC
Telephone call from mobile with free dialling
CU210 lifts the hook and waits for the dial tone and dials the pre-programmed telephone digits if there
are any. From now on the mobile can transmit TELDIG telegrams, each one making one telephone digit
to be dialled. Except from the free dialling of telephone digits, this traffic state is identical to the one
described above. If free dialling is taking place on a simplex channel or on a 2 wire connection, a
detected dial tone will be transmitted to the mobile and then interrupted, to give the mobile operator a
chance to dial. Furthermore after each dialled digit, the LF from telephone to radio is blocked during 5
seconds.
Alarm call to telephone
When an alarm call to telephone is received, eventual traffic going on, except alarm traffic, will be
disconnected.
The hook is lifted and the pre-programmed telephone number is dialled. Thereafter the behaviour is
identical as a normal call from a mobile to telephone. If alarm traffic is already going on when an alarm
call is received, the alarm call will be ignored.
Alarm call to LAC
When an alarm call to LAC is received, eventual traffic going on, except alarm traffic, will be
disconnected. The hook is lifted, the telephone number to LAC is dialled and the alarm code is
transferred. Thereafter the LF between the radio and LAC is connected. For further information of
the signalling protocol between CU210 and LAC, please refer to ERA document no F/KTF 83:145
"Personlarmsignalering mot LAC". The call is disconnected by DTMF # or DTMF C from the LAC
operator. If alarm traffic is already going on when an alarm call to LAC is received, the alarm call to LAC
will be ignored. During the connecting phase of alarm call to LAC it is not possible for the operator to
break in by pressing PTT.
Outgoing calls
Call from telephone to mobile
When CU210 has detected a ring signal, the hook is lifted and one of two different answer tones is
generated:
•
LP200/210 is involved in traffic. It is not possible to make a call from telephone. A block tone
consisting of 250 ms long 425 Hz tone followed by a 750 ms pause is repeated five times before
hanging up.
•
LP200/210 is idle and is ready to accept a call from telephone. A 1 second long 425 Hz answer tone
is transmitted.