When you push the Test button on a Fastlink C601 Encoder, you should see approximately 3 kHz +/- 400 Hz of deviation on an RF service monitor. You should see this same deviation when you push the Test button on the Omegalink/Multilink Encoder.
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Press [Command + 5 9] to display the firmware revision. B Series control panels can also use the menu commands: Press Menu, select 3 for Actions, 3 for Test Menu and 3 for Display Revisions. Or; Menu +3+3+3
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The module requires 4 VDC or greater. When the phone is left off hook, the telephone switching equipment reduces the line voltage to 3 VDC in order to provide enough power for the other lines. The module then sends its trouble.
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