Call routing
203
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
6. 4. 3. 6 Exchange access authorization
The outgoing authorization to telephone into the public network is defined with the pa-
rameter Exchange Access authorization in a permission set. The permission set is
then assigned to a user.
This setting does not bar dialling into the public network with abbreviated dialling and
emergency numbers (see "Bypassing the digit barring", page 193
).
6. 4. 3. 7 Priority exchange allocation
This feature gives individual users preferential treatment when they set up outgoing
connections. If a user with priority exchange allocation sets up a connection and all the
B channels of the selected route to the network are busy, one of the B channels will be
cleared down and made available to the user (user configuration setting: External
priority enabled).
Fig. 96 Network access rights for users with and without Priority exchange allocation
Mitel Advanced Intelligent Network:
In an AIN, priority exchange allocation can only be guaranteed on the local exchange inter-
faces, not across the entire network.
Example
In the event of an alarm, an alarm system independent of the communication server
transmits a message to an alarm headquarters via an ISDN card on an S terminal in-
terface (e.g. a text or a file).
B
A
External priority = normal
External priority = emergency
If A wants carry out an exchange
seizure, he obtains no B-channel
B requires an exchange seizure, an
existing connection is cleared
down for him.
All B channels busy
Commu-
nication
server
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