Wake on Ring

The operation of Wake on Ring can be summarized as follows:

  • Turns on the computer from either the APM soft-off mode or the ACPI S5 state
  • Requires two calls to access the computer:
    • First call turns on the computer
    • Second call allows access when the appropriate software is loaded
  • Detects incoming call differently for external as opposed to internal modems:
    • For external modems, motherboard hardware monitors the ring indicator (RI) input of serial port A. Serial port B does not support this feature.
    • For internal modems, a cable must be routed from the modem to a Wake on Ring connector on the NLX riser, if supported by the riser.
























Resume on ring

The operation of Resume on ring can be summarized as follows:

  • Resumes operation from either the APM sleep mode or the ACPI S1 state
  • Requires only one call to access the computer
  • Detects incoming call similarly for external and internal modems; does not use the Wake on Ring connector
  • Requires that the modem interrupt be unmasked for correct operation