Lexmark X125 Service Manual page 46

4412-00X
Modem Test
The modem sends various transmit signals on the telephone line.
You can check the following:
– FSK
– Tones: 1100Hz, 1650Hz, 1850Hz, 2100Hz
– G3 training: 33600, 31200, 28800, 26400, 21600, 14400,
12000, 9600, 7200, 4800, 2400 bps
1. Press Setup.
2. Press Menu until 'Modem Test' displays.
DTMF Test
This feature lets the user or tester verify that the phone keypad
buttons are working correctly.
1. Press Setup.
2. Press Menu until "DTMF Test" displays.
3. Press Start.
To test each button, press each button one at a time. There is a
different tone for each button. Each pressed button displays a
corresponding number or symbol in the LCD. If any button fails,
replace the operator panel.
ROM Test
Display ROM version and checksum.
1. Press Setup.
2. Press Menu until 'ROM Test' displays.
3. Press Start or Setup.
Modem Speed
Default=33600 bps
Select baud rate of 33600, 28800, 14400, 12000, 9600, 7200, 4800
or 2400 bps. The lower the baud rate, the larger the acceptable error
rate. T30 protocol has a fixed speed of 300 bps in the protocol mode.
When the TX speed is set to 33600 or 28800 bps, the RX speed is
either V.34 V.17 or V.33. When the TX speed is set to 14400 or
3-10
Service Manual