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Level 4
0
:
Conditions
CAUTION
The software contained in the TRS/Barring feature to allow user access to the network must be
upgraded to recognise newly established network area codes and exchange codes as they are placed
into service.
Failure to upgrade the on-premise PBXs or peripheral equipment to recognise the new codes as they
are established will restrict the customer and users of the PBX from gaining access to the network and
to these codes.
KEEP THE SOFTWARE UP TO DATE WITH THE LATEST DATA.
•
A COS should be assigned for each extension.
→ 8.2 Users—User's Device Settings—COS
•
TRS/Barring checks are applied to the following:
–
ARS
–
Trunk Access (Idle Line/Trunk Group/S-CO Line)
•
It is programmable whether " " or "#" is checked by the TRS/Barring. This is useful in preventing
unauthorised calls which could be possible through certain telephone company exchanges.
→ 15.5 PBX Configuration—[7-5] TRS—Miscellaneous—TRS Check for Dial " * # "
•
It is programmable whether TRS/Barring checks the digits dialled after the External Feature Access
during a trunk call. (→ 2.11.7 External Feature Access (EFA))
→ 15.5 PBX Configuration—[7-5] TRS—Miscellaneous—TRS Check after EFA
•
Host PBX Access Code/Special Carrier Access Code
TRS/Barring checks for numbers dialled with a Host PBX Access code (→ 2.5.4.8 Host PBX Access
Code (Access Code to the Telephone Company from a Host PBX)) or a Special Carrier Access code
(→ 2.5.4.9 Special Carrier Access Code) in the following cases:
Type
Host PBX Access
Code
Special Carrier
Access Code
•
ARS
Denied Code Tables
Leading number to deny
both international and long
distance calls
:
Stored
Found
Deletes the code. A
TRS/Barring check is
carried out on the
following digits.
Deletes the code. A
TRS/Barring check is
carried out on the
following digits.
2.7.1 Toll Restriction (TRS)/Call Barring (Barring)
Exception Code Tables
03
Long distance numbers for
cities to be allowed, and
06
leading number of cellular
090
phones
Not found
The call is made
(excepted from TRS/
Barring).
TRS/Barring checks
the whole number.
:
Not stored
TRS/Barring checks
the whole number.
TRS/Barring checks
the whole number.
Feature Manual
111
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