PRINCIPLES OF ARS MECHANISMS CALL SERVER : PRIVATE NETWORKS
Ed. 0412/18 Réf. 3EH 21000 BSAA
ARS INTERACTIONS WITH OTHER SERVICES
LINE ALLOCATION
This feature is incompatible with ARS mechanisms.
BARRING AND TRAFFIC SHARING
The traffic sharing mechanism within a trunk group list or between trunk group lists can be used to
authorize overflow between trunk groups for specific users.
When barring prohibits dialing on the selected trunk group, no overflow is possible and the call is re-
leased.
EMERGENCY NUMBERS
This paragraph only concerns the emergency numbers defined when the system is initialized (numbers
installed in ROM).
ARS table base fields:
The only possible configurations for emergency numbers ("Network" field = Urg.) are:
- prefix = empty; replace = empty: transparent dialing in the ARS table.
- prefix = empty; replace = XXX: addition of digits XXX (used for break-out).
The traffic sharing and barring mechanisms are not applied to emergency numbers (as with collective
speed dial numbers).
If the emergency number is dialed after line seizure, the call goes through the ARS mechanisms if the
line figures among the trunk groups in the ARS tables; if not, the number is transmitted on this line
directly.
If the ARS table has no entry for emergency numbers, the trunk group associated with the default public
prefix is used, if there is one; if not, the main trunk group is used.
Network Prefix Ranges Substitute TrGp list Called/HH User com.
Urg - - - XX
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