Nortel M2000 Reference Manual page 48

Response: LCD 2 comes on.
8 Press Dial Pad Key 3.
Response: LCD 3 comes on.
9 Press Dial Pad Key 4.
Response: LCD 4 comes on.
10 Press Dial Pad Key 5.
Response: LCD 5 comes on.
11 Press Dial Pad Key 6.
Response: LCD 6 comes on.
12 Press Dial Pad Key 7.
Response: LCD 7comes on.
13 Press Dial Pad Key 8.
Response: LCD 8 comes on.
14 Press Dial Pad Key 9.
Response: LCD 1 and 8 come on.
15 Press Dial Pad Key 0.
Response: LCD 2 and 8 come on.
16 Press Dial Pad Key * (asterisk).
Response: All LCDs come on. (See note.)
17 Press Dial Pad Key # (pound).
Response: All LCDs turn off.
18 Press Function Key 1.
Response: LCD1 comes on.
19 Press Function Key 2.
Response: LCD 2 comes on.
20 Press Function Key 3.
Response: LCD 3 comes on.
21 Press Function Key 4.
Response: LCD 4 comes on.
22 Press Function Key 5.
Response: LCD 5 comes on.
23 Press Function Key 6.
Meridian SL-100 M2000 Digital Telephone Reference Manual
Testing and maintenance 3