A SERVICE OF

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General Features
Features Guide 25
Conditions
• Walking COS
The extension user can make a toll call at other lower level COS extensions (toll / outward
restricted) by employing his own higher level COS temporarily.
• Switching COS
Two different levels of COS, Primary COS and Secondary COS, are assigned to all
extensions. However, either one of them is valid at a time. The Manager and the Operators
can change the COS level of any extension including their own.
Programming Guide References
• 2.4 Class of Service (COS)
• 4.3 Extension Line
– [COS No.] Primary
– [COS No.] Secondary
• 4.7 ISDN Extension Line
– [COS No.] Primary
– [COS No.] Secondary
Features Guide References
1.6 Originating Features
•WalkingCOS
User Manual References
• 4.3.84 Walking COS
• 4.4.10 Switching COS