1.1 Incoming Call Features
30 Feature Guide
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.
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. (→
2.2.5 Operator Features)
• Because each doorphone port is assigned a COS, the Internal Call Block feature can restrict certain
extensions from calling certain doorphones. (→ 1.15.1 Doorphone Call)
Feature References
2.2.1 Class of Service (COS)
1.1.3 Incoming Call Indication Features
1.1.3.1 Incoming Call Indication Features—OVERVIEW
Description
Extension telephones can indicate an incoming call in various ways, described below.
Indication Type Feature Description Details in
Ring Tone Ring Tone
Pattern
Selection
A telephone rings when receiving a call. A
different ring tone pattern can be assigned to
each incoming call type.
• 1.1.3.2 Ring
Tone Pattern
Selection
Voice-calling Alternate
Receiving—
Ring/Voice
Proprietary telephone (PT) users can choose
how their telephones receive intercom calls, by
selecting to hear ring tones or the caller's voice.
• 1.5.3 Intercom
Call
COS 1
Extn. 100 Extn. 101
COS 2
Extn. 102 Extn. 103
COS 3
Extn. 104 Extn. 105
Extn. 106
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