Specifications

655A power supply
Issue 6 February 2007 217
Figure 60: 655A faceplate LEDS
655A ring generation
The 655A provides either North American ringing (20Hz) or European/International (25Hz)
ringing. The 655A also has a setting to provide no ringing. This setting is applicable when the
customer supplies a ring generator that is external to the power supply. An example of an
external ring generator is the TN2202 French ringing circuit pack.
The 655A power supply provides a physical slide switch to select the frequency of the ring
generator. The options are:
● 20Hz — North American
● 25Hz — European and international
● Other — No ringing output. Applicable when an external ring generator is used such as the
TN2202 French ringing circuit pack.
You must remove the power supply from the G650 when you change the ringing frequency
selection. The ringing frequency selection switch is on the back of the power supply.
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Power
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C
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K
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R
V
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1
FAN OR POWER FAIL
FAN AND POWER OK
AC INPUT
DC INPUT
ACTIVE RING
1
FAN OR POWER FAIL
FAN AND POWER OK
AC INPUT
DC INPUT
ACTIVE RING