Ricoh Aficio MP 161SPF - Manual (Page 218)

Registering Addresses and Users for Facsimile/Scanner Functions
210
7
K
Enter the login user name, and then press the {OK} key.
L
Press [Password].
M
Enter the password, and then press the {OK} key.
N
Enter the password again to confirm, and then press the {OK} key.
O
Press the {OK} key.
P
Press the {Escape} key.