Panasonic KX-TDA50G Feature Manual page 170

9.1.14 Internal Call Block
In this example:
a.
COS 1 can make calls to all extensions.
b.
COS 2 can make calls to COS 1 only. (COS 2 cannot make calls to COS 2.)
c.
COS 3 can make calls to COS 3 only.
Extn. 100
COS 2
Extn. 102 Extn. 103
Conditions
•
Internal Call Block also prohibits certain features, such as Walking Extension and Walking COS, from being
performed between certain extensions.
•
Any extension can make an Operator Call regardless of the Internal Call Block setting of its COS. (®
12.1.5 Operator Features)
•
Because each doorphone port is assigned a COS, the Internal Call Block feature can restrict certain
extensions from calling certain doorphones. (® 4.1.11 Doorphone Call)
PC Programming Manual References
4.13 [2-7-3] Class of Service—Internal Call Block—
from Other Extension 1–64
5.12 [3-5-1] Incoming Call Distribution Group—Group Settings—Main—
6.1 [4-1-1] Wired Extension—Extension Settings—Main—
6.10 [4-2-1] Portable Station—Extension Settings—Main—
7.1 [5-1] Doorphone—
7.6 [5-4] External Relay—
Feature Manual References
3.1.19 COS (Class of Service)
170 Feature Manual
COS 1
Extn. 101
Extn. 104
COS
COS Number
COS 3
Extn. 105 Extn. 106
COS Number of the Extension Which Receive the Call
COS
COS
COS
Document Version 2008-11