Clip On Analogue Exchange Accesses - Aastra 400 Series System Manual

Identification elements
4. 8

CLIP on analogue exchange accesses

The systems are capable of receiving the number of incoming calls on analogue ex-
change accesses and forwarding it to terminals. This requires a number of settings
to be made in AMS. The network provider must also support CLIP on analogue ex-
change 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: The system supports data transmission during the call (set-
ting No alerting signal) and both methods during data transmission before the
call with the settings
quired depends on the network provider.
108
Ring pulse and Polarity reversal & dual tone. The setting re-
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013