User`s guide

1(2)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
97-10-31 B
403/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
SEA/TB/MP T.Preißner
SEA/TB/MP ASB 150 02
SEA/TB/XE
PRIVATE TRUNK LINE
Definition
Private trunk line means that a trunk line can only be
utilised by an identified extension.
Incoming traffic via the same trunk calls the extension
directly, either as individual answering position or
external line key. The line can be transferred freely to
another party.
Use
A private trunk is used foremost when an extension
user in an organisation (a company) has sufficient
traffic to motivate his own trunk.
Like other trunks the private trunk can have multiple
representation, e.g. on a secretary's telephone.
Operation
System telephones
Incoming call on external line key
The lamp for the programmed trunk key is showing
rapid flash.
• Answer call by pressing key.
Lamp flashes to confirm connection
Incoming call on Line 1
• If trunk has been inserted as individual answer-
ing position, answer call by pressing key to call
traffic function for own number
Outgoing call via external line key
• Press programmed external line key.
Lamp flashes to confirm connection.
Dial tone received from public exchange
Outgoing call with directory number
• Dial directory number of trunk.
Lamp flashes to confirm connection.
Dial tone received from public exchange
Capacity
All trunks can be programmed as private trunks.
Limitations
A trunk that is to be available only to its "owner" for
outgoing external traffic must be removed from route
searching.
The trunk can be transferred to another party and is
then inaccessible for its owner.
A private trunk line that calls own number can be
diverted if it is not represented on an external line key.
Also a trunk that has been programmed as a private
trunk line can be accessed if the individual directory
number of the private trunk line is known.
All extensions possessing private trunk lines can form
an own traffic group. This prevents the trunks from
being accessed by extensions that do not possess
private trunk lines.
Also private trunk lines are subjected to TCD-analysis
and are dependent on the extension's category.
403.fm
Database reference