H3C XE 200 IP, Operation Manual

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Operation Manual – Call Services
H3C XE 200/2000 IP PBX
Chapter 4 Inter-Group Call Restriction Service
4-1
Chapter 4 Inter-Group Call Restriction Service
4.1 Introduction to Inter-Group Call Restriction Service
The XE IP PBX provides the inter-group call restriction service for easy management
on call relationship between groups.
Call limit group is a logical concept. The administrator can define different groups and
set call limit relationship between them.
Before subscribers utilize the call limit service, the administrator sets the limit groups for
the two parties. After the setting, the XE IP PBX decides whether to allow the setup
according to the call limit relationship between groups that the caller and callee belong
to.
The call limit relationship between groups is unidirectional. By default, any two common
call limit groups can make calls to each other.
By default, there is one black group, a white group and a default common group,
named black-table, white-table and normal-table respectively. The default common
group and groups defined by the administrator are all common groups. Any subscriber
number and route number which are not covered in the black group, the white group or
any other group defined by the administrator go into the default common group
(normal-table). You cannot change the call limit relationship between the three groups.
The call limit relationship is shown in Table 4-1 .
Table 4-1 Call limit relationship between common groups, the white group and the
black group
Caller group
Called group
Black-table White-table Normal-table
Black-table N Y N
White-table N Y Y
Normal-table N Y Y
In Table 4-1 , N means no calls are permitted and Y means calls are permitted.
Note:
A number in a black group can dial any emergency call number, and can be called by
any number when it is set as an emergency call number.