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Chapter 4 — Power supplies
Commercial Power Backup
553-3121-100
Standard 2.0
•
In the Expansion cabinet
— When the NTMW07 card is in slot 11 & 12
TN 11 03 connects to TN 12 03
(Trunk on Card 11 Unit 03 connects to the telephone on Card 12
Unit 03)
— When the NTMW07 card is in slot 13 & 14
TN 13 03 connects to TN 14 03
(Trunk on Card 13 Unit 03 connects to the telephone on Card 14
Unit 03)
— When the NTMW07 card is in slot 15 & 16
TN 15 03 connects to TN 16 03
(Trunk on Card 15 Unit 03 connects to the telephone on Card 16
Unit 03)
An Un-interruptible Power Supply (UPS) may be connected to the
Option 11C Compact system in order to provide a continuous supply of
AC-power.
The UPS requirements are based on the following:
•
The NTMW11 Power Supply is rated at 750 VA Maximum
•
The Real Power is 460 W Maximum
•
The Power Factor is approximately 0.6
•
The power-up in-rush surge current is 35A maximum (120 VAC)
A typical 80-line single cabinet system (CPU, Voice Mail, three 24 DLC, one
PRI) will have a UPS load of approximately 360 VA.
Selecting a UPS is a function of the total power to be supplied multiplied by
the total hold-up time desired.
September 1998
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