System Functions and Features as of I7.9
70
Identification Elements
sy
d-
020
0/3.
0
– I7.
9
– 1
1
.2009
3. 8
CLIP on analogue exchange accesses
1)
The system A150 and A300 are capable of receiving the number of incoming calls
on analogue exchange accesses and forwarding it to terminals. This requires a
number of settings to be made in AIMS. The network provider must also support
CLIP on analogue exchange accesses in accordance with ETSI standard (ETS 300
778-1).
The standard defines 4 different methods. The CLIP data is transmitted either be-
fore or during the call.
Data transmission before the call
Data transmission before the first ring. An alerting signal is sent beforehand. The
alerting signal is either:
•
a short ring (ring pulse)
•
two successive tones (dual tone)
•
A line polarity reversal followed by a dual tone.
Data transmission during the call
Data transmission between the first and the second ring. No special alerting signal
is sent (the first ring is used as the alerting signal).
System configuration
Carry out the following settings under 2_2_1 in the Configuration Manager:
•
CLIP detection
=
Yes
•
CLIP data attenuation
: The level of CLIP data varies from one network provider to
the next. An excessively high level can lead to detection problems. Activating
this parameter can attenuate the signal.
•
Alerting signal type
: A150/300 supports data transmission during the call (setting
No alerting signal
) and both methods during data transmission before the call
with the settings
Ring pulse
and
Polarity reversal & dual tone
. The setting required
depends on the network provider.
1)
A150/300 only
