Identification elements
75
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
–if Ringing pattern = automatic is set in the terminal configuration (setting for
analogue terminals only).
• An enquiry call from a user with an exchange call on hold if the parameterRing-
ing pattern at enquiry destination = external is set in the common settings (see
"Hold (enquiry call)", page 399).
The Ringing pattern at enquiry destination setting is valid throughout the system.
Note:
Certain terminals which automatically answer calls (e. g. fax machines)
are not able to interpret the double ringing tone correctly. With these ter-
minals the configuration Ringing pattern = automatic can be used to force
a situation where the single ringing tone is always used for all calls.
Alternative for the Aastra 5300, Aastra 5300ip series of system phones
and the Aastra 2380ip IP softphone
Different ringing melodies can be configured separately in the terminal configura-
tion for each system phone to help differentiate between internal and external
calls. If the parameter External ringing melody = 0, the single and double ringing
tone is used to make the distinction; otherwise, the configured ringing melodies. If
no distinction is required, the identical melody can be entered in both places.
Identifying the Origin of a Call
If an incoming call's CLIP number corresponds to numbering plan identifier E.164,
the system assumes that the call comes from the public network.
If an incoming call's CLIP number corresponds to numbering plan identifier PNP,
the system assumes that the call comes from the PISN.
If the CLIP number’s numbering plan identifier is unknown, the trunk group config-
uration is used to decide whether the call is signalled internally or externally (NPI
call unknown setting).
See also:
"Numbering Plan Identifiers", page 47
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