10.7.3 PBX Configuration—[2-7-3] System—Class of
Service—Internal Call Block
Internal Call Block determines the restrictions placed on making intercom calls. The extensions, incoming call
distribution groups, and doorphones belonging to a certain COS can be programmed to not receive intercom
calls from those belonging to a certain COS.
COS Number of the Extension Which Receive the Call from Other Extension 1–
64
Specifies the combinations of COS levels for which intercom calls are blocked.
Value Range
Block (blue), Non Block
Maintenance Console Location
10.7.3 PBX Configuration—[2-7-3] System—Class of Service—Internal Call Block
PC Programming Manual References
11.5.1 PBX Configuration—[3-5-1] Group—Incoming Call Distribution Group—Group Settings—Main—
COS
12.1.1 PBX Configuration—[4-1-1] Extension—Wired Extension—Extension Settings—Main— COS
12.2.1 PBX Configuration—[4-2-1] Extension—Portable Station—Extension Settings—Main— COS
13.1 PBX Configuration—[5-1] Optional Device—Doorphone— COS
Feature Guide References
2.1.2.2 Internal Call Block
PC Programming Manual 511
10.7.3 PBX Configuration—[2-7-3] System—Class of Service—Internal Call Block
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