Modem And Ncu Tests - Canon MultiPASS C5000 Service Manual

6.2.6 Modem and NCU tests

These tests test modem and NCU transmission and reception. The modem tests check
whether signals are sent correctly from the modem by comparing the sound of the signals
from the speaker with the sounds from a normal modem. Also, you check on the display
whether or not the modem correctly detected received tone signals and DTMF signals.
End this test by pressing the STOP button.
Frequency test
G3 signal transmission test
CNG signal reception tests
a) Frequency test
The frequency test menu is selected by pressing the 2 button from the MODEM NCU test
menu. Signals of the frequencies below are sent from the modem using the modular jack
and the speaker. The frequency can be changed with the numeric buttons.
Numeric button
0
1
2
3
4
5
6
The pseudo-ringback tone transmission pattern and frequency and the
output levels for each frequency follow the service data transmission level
settings.
N O T E ~~
Chapter 3: Maintenance & Service
Overview
The modem sends tone signals from the modular jack
and the speaker.
The modem sends G3 signals from the modular jack
and the speaker.
The modem detects specific frequencies and DTMF
signals received from the modular jack.
Frequency_
Pseudo-RBT
462 Hz
1100 Hz
1300 Hz
1500 Hz
1650 Hz
2100 II2