ASCOM Ascotel 2025 System Manual page 325

ascom Ascotel 2025/2045/2065
Exchange access authorization
The authorization to make outgoing calls to the public network can be granted or
restricted for each subscriber ("Exchange access authorization" setting in the sub-
scriber configuration).
This setting does not bar dialling into the public network with abbreviated dialling
and emergency numbers. If, however, abbreviated dialling numbers are dialled
using names, they will be disabled (see "Bypassing the digit barring",
Page 2.137).
Priority exchange allocation
This feature gives individual subscribers preferential treatment when they set up
outgoing connections. If a subscriber 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 subscriber
(subscriber configuration setting: "External priority = emergency).
All B channels busy
Fig. 2.73: Network access rights for subscribers with and without "Priority exchange allo-
cation"
2.148 Call Routing
PBX
A
B
haz0125aaenb0
Subscriber Config.
Ext. priority = normal
If A wants to seize an exchange line,
no B channel will be available
Subscriber Config.
Ext priority = emergency
B requests an exchange line
seizure; an existing connections is
disconnected on behalf of B
HBT_20321104_02/B0_en