Nortel Millennium multi-pay M1211, Инструкция по установке, эксплуатации и обслуживанию

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Maintenance-level activities 5-13
Checking the central office line
Before checking the central office (CO) line, use your butt-
end test set to check the telephone line to the terminal
battery voltage and dial tone.
To test the line to the CO:
1. Access the initial maintenance prompt as explained in
Accessing the initial prompt.
2. Press * .
This message
appears
on the VFD:
227. Check cardreader
Use l=DO IT, *=NEXT
3. Type in 546 on the keypad or press * repeatedly until:
this message
546. Check C.O. line
appears
on the VFD:
Use l=DO IT, *=NEXT
4. Press 1.
This message
C.O. line check
appears
on the VFD:
Go offhook
5. Lift the handset off-hook.
The test checks line voltage and dial tone.
This message
appears
on the VFD:
Checking C.O.
connection
Millennium multi-pay terminal installation, operation, and maintenance guide