CHAPTER 13 TROUBLESHOOTINGCOPYRIGHT © 2002 CANON INC. 2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002 13-1475.5.6 MODEM NCU Test (4: MODEM NCU)Use it to execute a transmission test for MODEM NCU. In a modem test, you can makesure that the signals from the modem are transmitted normally by listening to the soundof signals from the speaker.You can also use it to make sure that the received total signal and DTMF signal are cor-rectly detected by the modem. To end the test, press the Stop key.TypeFrequency testG3 signal transmission testTonal signal reception testV.34 G3 signal transmission testDescriptionThe modem sends tone signals from the modular jack and thespeaker.Use it to generate the G3 signal coming from the modem using thetelephone line terminal and the speaker.Use it to monitor a specific frequency and the DTMF signal re-ceived from the telephone line terminal by causing them to be in-dicated on the LCD (i.e., the presence/absence as detected). Thereception signal is generated by the speaker.The modem sends V.34 G3 signals from the modular jack and thespeaker.a.Frequency TestA press on ‘2’ on the keypad from the MODEM NCU Test menu selects the frequencytest. In this test, signals of the following frequencies from the modem are transmitted us-ing the telephone line terminal and the speaker. To select a different frequency, use thekeypad.Keypad1234567Frequency462 Hz1100 Hz1300 Hz1500 Hz1650 Hz1850 Hz2100 HzMemoThe frequency and the output level of individual frequencies are in keep-ing with the output level set in service mode.
