189 Matrix VISIONPRO System Manual
Privacy
While two stations are in speech, it is desired that no third person can listen to their conversation. However if few
important stations are allowed to use features like Interrupt Request, Barge-in and Raid, they can intrude other’s
conversation. Also if DID is activated, outside caller can reach any station or if there is a call from another trunk line,
it will interrupt your conversation by giving intrusion tone. Some times this is very annoying and undesirable.
VISIONPRO provides privacy against all these types of intrusions. This is known as Privacy.
There are four types of intrusions from which a user may wish to have privacy:
• Privacy from Interrupt Request and Barge-In.
• Privacy from Raid.
• Privacy from Trunk call intrusion (Beeps).
• Privacy from DID call.
These four types are provided as programmable features in the Class of Service groups. A user can be assigned
any combination of above four privacy options by selecting an appropriate Class of Service group. If it is required
that no other station can raid your station then the corresponding feature that is, Privacy from Raid in the Class of
Service should be enabled. Likewise, other features should be enabled or disabled as per the requirement.
How it works
Intrusions can occur on a station when another station invokes any one of the following features:
• “Interrupt Request (IR)”
• “Barge-In”
•“Raid”
Intrusions can also occur,
• When an external caller uses “Direct Inward Dialing (DID)” to reach a station.
• When there is a call from a trunk line when you are in speech with someone else and your station is
configured in the “Trunk Landing Groups (TLGs)”.
To prevent such intrusions, VISIONPRO enables you to set the following types of Privacy:
• Privacy from Interrupt Request, Barge-In: This type of Privacy protects a station from intrusions by
other stations using Interrupt Request or Barge-In.
For example: Station A has Privacy from Interrupt Request and Barge-In.
Station A and B are in speech, Station C attempts to intrude the conversation by Interrupt Request or
Barge-In. Station C’s call will be blocked and C will get error tone.
• Privacy from Raid: This type of Privacy protects a station from intrusions by other stations using Raid.
For example: This type of Privacy is set on Station A. Station A and B are in speech, Station C uses Raid to
intrude the conversation. Station C’s call will be blocked and C will get error tone.
• Privacy from Trunk call intrusion (Beeps): This type of Privacy prevents the trunk landing destinations
that are busy from being intruded by another waiting trunk call.
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