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----------------------------------------------------------------------------------------------------------------------------------------------------------- Access to emergency call records can be obtained
an enhancement which would allow the telephone
in two forms:
number and address of the caller to be automati-
cally displayed on the EAs own mobilising com-
Normal For investigatory purposes where it is
puter screen.
required as evidence or similar use.
Arrangements for access will be agreed
The advantages of CLI are:
at the time of request.
Caller's number and address automatically
Urgent Where instant access is required to
available on answer, no need for information
respond to a
999 incident.
(Current
to be passed verbally or the EA operator to
equipment means this would take sever-
type. Reduces typing errors.
al minutes.)
Name of BT OAC displayed, for call back if
The authority levels for access required are:
necessary.
Normal Duty Principal Officer
Caller can speak to the EA sooner, reducing
frustration or panic. Address and telephone
Urgent Senior Duty Control Room Officer
number is simply confirmed.
An authorised representative of the EA (not neces-
CLI overcomes the problem of spelling, pro-
sarily the Authorising Officer) must be present
nunciation and language difficulties.
when the tapes are being played at an Operator
Services Centre.
Early indication of hoax calls
- the auto-
address will reveal if the caller is giving a
BT will only keep original 999/112 recording tapes
false address or at a payphone often used to
for a period of 3 months. Evidential quality copies
make malicious calls, or perhaps a mental
can be requested if necessary.
hospital.
BT will apply to the Chief Officer of the relevant
As mobile zones decrease in size the auto-
EA for similar recordings of calls made by the
matic Zone Code may help EAs to question
EAs.
callers who are unsure of their location.
PTO's inform all their customers to use the
BT have devised a system which requires an ISDN
999/112 code when making emergency calls.
link from that operator centre which is used to for-
PTO's do not tape record emergency calls made on
ward CLI to the EACC. On receipt of a call the
any other circuit. However, such calls are
EAs mobilising system will dial into the BT data-
processed despite the use of the incorrect code.
base for address information which will be dis-
played on the EA mobilising screen, this will take
4.1.6 Calling Line Identity (CLI)
less than
10 seconds, (a pilot trial in place at this
time is providing the information in one second).
Since
1985 BT have been modernising their net-
This is technically a dial-up system (which will
work and converting from analogue to digital
have a small cost implication for the EA) but will
exchanges. This modernisation is almost complete
appear automatically to the EA operator.
giving 99% CLI coverage, which means BT oper-
ators have instant access to the callers address on
Trials of this system have commenced in the
40 million lines.
Ambulance service and will shortly commence for
the Police. The Fire Service
(CACFOA) have
Once BT developed CLI for their own operators,
decided to wait for the long term strategic solution,
the emergency services requested an enhancement
when, once European Standards have been devel-
to 999 services to reduce call handling times and
oped, should allow CLI name/address to be passed
the number of hoax calls. Their requirement was
together.
Communications and Mobilising
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