Canon MultiPASS C50 Service Manual page 178

Part 1: Facsimile
c) CNG and DTMF signal reception tests
The CNG and DTMF signal reception test is selected by pressing the 6 button from the MODEM NCU
test menu. In these tests, you can check whether the CNG signals and DTMF signals received from the
modular jack are detected by the modem.
The CNG is not
detected.
The CNG is
detected.
Detection Level
4-6: TONE RX
0 OFF NO ENERGY
0 OFF
0 ON
Figure 3-31 CNG and DTMF Signal Reception Tests
alternately
displayed
The received DTMF "9"
9
is displayed.
2nd received DTMF "2"
92
is displayed.
Press the STOP button to end the test.
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