User`s guide

17(59)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 A
365/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
System feature - Basic call
Basic Call is used for circuit mode switched calls like
voice, video or data.
Three types of logical ISDN network accesses are
possible:
1 public ISDN,
non-corporate network access via the public network
2 private QSIG,
corporate network access via the private network
3 private VPN,
corporate network access via the public network
In conjunction with basic call control, the following
network features and services are possible:
• Calling line category: QSIG and proprietary
• Transit counter: QSIG and proprietary
• Travelling class mark: proprietary
Basic call service - Calling line category
Calling line category functionality is used to indicate the
category of the calling/connected party involved in the
call to another PBX in the corporate network.
Basic call service - Transit counter
Transit counter functionality limits the number of
transit points in the corporate network through which
a call can be routed in order to avoid uncontrolled
looping in the network.
Basic call service - Travelling Class Mark (TCM)
The TCM feature makes possible to control and
restrict the call originator (user) of routing in private
networks. Each originator (e.g. extensions, operators,
incoming trunks) is assigned a ‘facility restriction
level’ category which is passed through the network
as TCM value. In addition, each route choice defined
for a given destination in the network is also assigned
a TCM value. By comparing TCM levels for call
originator and chosen route, it is decided whether a
call setup can continue or be rerouted / rejected.
To allow continued call setup, the TCM value for the
call originator must be higher or equal in comparision
to the chosen route.
Assignment of TCM category:
TCM category must be introduced for all calling
originating call parties in the system.
Each of the defined route(s) for a certain ‘private
network access code’ will have a TCM category
between 0 and 7. TCM category not programmed
means ‘no routing restriction, calls may always pass
through.’
Calling line category translation between different signalling types:
ASB15002 users: Proprietary services (ASB501): QSIG standard (other-vendor PBX)
Digital extension Digital extension Extension
Analog extension Analog extension Extension
- Terminal (Data extension) -
Operator Operator Operator
Trunk line Trunk line Unknown
Tie line Tie line Unknown
- Emergency Extension Emergency extension
ISDN Extension ISDN Extension Unknown
Cordless Extension Cordless Extension Extension
Other facility - Unknown