Call routing
218
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
6. 5. 3. 6 Exchange access
The outgoing authorization to telephone into the public network is defined with
the parameter Exchange access in a permission set. The permission set is then as-
signed 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 208).
6. 5. 3. 7 Priority exchange allocation
This feature gives individual users preferential treatment when they set up outgo-
ing 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 = emergency).
Fig. 91 Network access rights for users with and without Priority exchange allocation
Aastra Intelligent Net:
In an AIN, priority exchange allocation can only be guaranteed on the
local exchange interfaces, 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 ter-
minal interface (e.g. a text or a file).
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