User`s guide

19(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
ISDN CALLER LIST
DEFINITION
The ISDN caller list enables an authorised user of a
system telephone to store in his/her own caller list
incoming DDI ISDN calls, which could not be
answered because of absence or busy.
USE
By storing unanswered calls in the system, e.g. in case
of no answer or busy, this function will ensure that no
incoming ISDN calls to system telephones will be
missed.
Via the telephone the following activities can be
performed when calls are stored in the caller list:
• Read-out of the number of unanswered calls
• Scrolling through the caller list
• Calling the stored numbers in the caller list
• Read-out of time and date of incoming calls
• Read-out of the number of attempts for an
incoming call
• Erasing of calls from the caller list
OPERATION
If calls are stored in the caller list, the user can scroll
through the list in order to decide which number he/she
wants to call back. The ISDN calling party numbers are
stored chronologically according to their arrival.
If the list is full, each further unsuccessfull incoming
call will delete the oldest call in the list (first in - first out
- principle).
Callers which are calling several times are stored in
the caller list as a single entry, with the latest arrival
time and a counter showing the number of call
attempts.
Storage criteria:
The criteria for the storage of an unsuccessful ISDN
DDI call in a callers list are the following:
• The minimum ringing time at the extension must
be more than 3 seconds.
• The calling party number must be provided by
the public network.
• The extension must be the one desired one by
the DDI call.
• The extension must be the first call destination in
the system. (Already answered and transferred
calls are not stored in the caller list )
• If the desired extension has activated a call
diversion ( follow me, direct, busy or no reply ),
the incoming ISDN call is only stored at the
diverting extension if the diversion address does
not answer the call. The minimum ringing time at
the diversion address must also be more than
3 seconds.
• If the desired extension does not answer within
the trunk reroute timeout, the incoming ISDN call
is stored in the caller list independent of whether
or not the call will be answered by the reroute
position of the trunk.
• If the desired extension is busy, the incoming
ISDN call is stored in the caller list independent
of whether or not the call will be answered by the
reroute position of the trunk.