User`s guide

39(44)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 G
268/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
SUPPLEMENTARY SERVICE
MALICOUS CALL
IDENTIFICATION (MCID)
DEFINITION
The supplementary service MCID enables a user to
request that the source of an incoming call is identified
and registered by the network.
USE
This feature is used to investigate the origin of
malicious calls.
OPERATION
System telephones
The B-party has two alternatives to activate the MCID
function in the public network:
During the call:
By pressing the programmed "MCID-key", the BTU-D /
BTU-B_ / MFU sends a special message to the public
network, which initiates the MCID function in the public
network. The public network answers the MCID inquiry
by sending different messages, which are interpreted
by ASB 150 02 as "MCID accepted" if A-number
tracing has been successful or as "MCID rejected".
If the B-party has not subscribed to the supplementary
service and/or the public network failed to record the
source of the incoming call, this is interpreted as
"MCID rejected".
The confirmation MCID accepted/rejected will be
presented to the telephones with call process tones
(acceptance tone and number unobtainable tone).
On the display of the STANDARD, EXECUTIVE or
OPERATOR telephone this confirmation is also
presented for 3 seconds, and after that the display
again presents the corresponding traffic case.
STANDARD
EXECUTIVE
OPERATOR
MCID ACCEPTED
DISPLAY REST S
MCID REJECTED
DISPLAY REST S
10 Feb 14:40 +15˚ MCID ACCEPTED
DISPLAY RESTRICTED SPEECH
cost-on
10 Feb 14:40 +15˚ MCID REJECTED
DISPLAY RESTRICTED SPEECH
cost-on
10 Feb 14:40 +15˚
745 NEWCALL
MCID REJECT NEW
C= 0 I= 0
redial serial
10 Feb 14:40 +15˚
745 NEWCALL
MCID ACCEPT NEW
C= 0 I= 0
redial serial