Matrix EPABX Vision-206S, Системное руководство

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Matrix
138 Vision System Manual
Power Down Mode
What’s this?
During power failure, it is desirable to have trunk lines available directly on few stations. This is known as power
Down Mode. When mains power returns, normal operation resumes. Change over from normal to power down
operation and back is automatic.
During power failure condition, calls can be made from these stations. Also the incoming calls lands on
respective stations. This way, your link with the outside world is retained even during dark-outs.
How it works?
Following block diagram shows the power fail transfer function for one port:
Telephone
connection
in the field
Station
Circuit
P&T Line
Power fail Transfer for One Port
C
C
NO
NC
NC
NO
Telephone
connection
in the field
Station
Circuit
P&T Line
Power fail Transfer for One Port
C
C
NO
NC
NC
NO
Figure 1: Normal Condition Figure 2: Power fail Condition
Important Points:
• During power down mode, by default, Trunk 1 gets connected to station 21, Trunk 2 gets connected to
station 22, whereas Trunk 3 gets connected to station 23.
Trunk Power Down Station
L1 21
L2 22 and Data Port
L3 23
• At the time of power failure/Power return ongoing calls will be disconnected.
Relevant Topics:
1. Installing the System 17
2. Troubleshooting 225
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