Oce 3121 Technical & Service Manual page 903

G3 signal transmission test (G3 TX)
I
Press 'G3 TX' on the MODEM NCU menu screen and press ' OK '. This will
start the G3 signal transmission test mode and invoke the corresponding
screen. Select an item to transmit the frequency selected by closing the DC
circuit, using the G3 signal transmission function of the modem. Simultane-
ously monitoring the transmission signal from the speaker. To interrupt,
press ' CANCEL '.
DTMF transmission Test (DTMF TX)
I
Press 'DTMF TX' on the MODEM NCU menu screen and press ' OK '. This
will start the DTMF transmission test mode and invoke the corresponding
screen. Select an item to transmit the frequency selected by closing the DC
circuit, using the DTMF signal transmission function . Simultaneously mon-
itoring the transmission signal from the speaker.
The DTMF signal will be transmitted in relation to the keys on the keypad,
* key and # key.
Pressing any key will highlight the corresponding notation.
The period during which the DRTF signal will be transmitted may be select-
ed as follows: LONG: until the next key is pressed; SHORT: for about 100
ms.
To interrupt, press 'CANCEL '.
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