Nortel Meridian 1 Planning, Installation And Operating Instructions page 110

Figure 19
NTMW11 power supply switch settings
Message
Waiting
-150V
-120V
Ringing
86VRMS
80VRMS
75VRMS
70VRMS
Switches located at top inside unit
Set switch in lower position for ON
Example:
The setting for North America is
normally:
-150V for message waiting
and
86VRMS 20 Hz for ringing
Option 11C Compact
Chapter 11 – Installing the power supply
SW1 SW2 SW3 SW4
ON
OFF
OFF
ON
OFF
OFF
4 3 2 1
OFF
ON
Unseat unit to set switches
Frequency Setting
OFF OFF
OFF OFF
OFF
ON
ON
OFF
Planning, Installation, Fault Clearing and CCBR Guide
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50 Hz
25 Hz
20 Hz