Nortel M3900 Series Description, Installation And Operation page 29

Table 4
M3902 key configuration
Key Number
Key 0
Key 4
Key 5
Key 1-5
Configure the M3900 Series Meridian Digital Telephone
Directory Number line must go on Key 0.
TRN (Call Transfer).
MWK (Message Waiting).
Key 1-5 do not configure as:
MCN = Multiple Call Non-ringing.
MCR = Multiple Call Ringing.
PVN = Private Line Non-ringing.
PVR = Private Line Ringing.
SCN = Single Call Non-ringing.
SCR = Single Call Ringing.
M3900 Series Telephones Description, Installation and Administration
Description
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