User`s guide

3(14)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 F
361/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
Incoming Traffic
Incoming traffic can be automatic or manually
transferred via the operator.
Automatic traffic
When ASB 150 02 detects an incoming call, a PTS
(Proceed To Send) signal is sent to the calling ex-
change.
The calling exchange then sends the directory number
that is analysed by the called exchange.
The exchange accepts directory numbers for
• an extension
• an operator
• a PBX- (extension-) group
• an ACD-group
• a fictive number
• an outgoing line (transit traffic, see below)
• another facility related to the desired directory
number
Adaptation of number length
The incoming (called number) can be too long or too
short for matching with the internal number plan.
ASB 150 02 can add or omit pre-digits to prepare the
received number for number analysis.
• Discard one to three digits before number
analysis.
• Add one or two digits to the received number
before it is analysed.
Manual traffic
In case of manual traffic the incoming line will always
be routed to an answering position, for example an
operator. The answering position can transfer the call
to the desired extension.
Camp-on
The incoming line can be programmed for automatic
camp-on to busy extensions. In this case, the caller will
receive the ring control tone until the desired busy
extension answers.
Reroute to answering position
An answering position can be defined for each in-
coming tie line. ASB 150 02 routes incoming calls to
this answering position in the following cases:
• Called extension is busy
• Called extension does not answer
• Incomplete number received
• Calls to the desired extension are not permitted
• Called extension is blocked
• Received number is unassigned (vacant).
Transit traffic
An incoming tie line or exchange line can be
connected to an outgoing tie line or exchange line.
Some prerequisites have to be fulfilled for transit traffic:
• The TRAFFIC GROUP MATRIX has to permit
transit traffic.
• The required transmission parameters and local
PTT rules have to be fulfilled for transit traffic.
Private trunk line and abbreviated numbers
The tie line can be represented on a key utilised as
PRIVATE TRUNK LINE.
Extensions can use abbreviated numbers for direct
calls to extensions in interworking exchanges.
Night service
Tie lines can be night-switched to a pre-programmed
directory number.
Programming of the tie lines in a separate night
service group enables them to be night-switched
individually.
The night service position has to be an extension
number in the same exchange (except for external
diversion to external targets defined as abbreviated
number).