Cabletron Systems CSMIM-T1 - Manual (Page 166)

Chapter 7: AT Commands and Registers
7-40 CSMIM-T1 Hardware Installation Guide
&Y n Designate Default User Profile
Selects user profile n, where n = 0 to 3 (Default is 0).
Designates which of four user profiles the modem loads into
active configuration at power up, or when DTR drops when &D3
is set. It saves this command immediately after you enter it; you
do not have to enter &W or *W. Also, when you enter &F, this
command does not change.
Z n Reset
Resets user profile n, where n = 0 to 3.
Hangs up the phone line and clears the modem and serial-port
buffers. Also, restores commands and registers that you last saved
with either &W or *, or the factory defaults if you have not
entered an &W or *W.
To reset the modem, type: ATZn (n = 0 to 3). If OK does
not appear, type: ATQ to enable result codes.
NOTES
Yn is available only during normal and direct connections.
Y1 must be set on both modems to take effect.
NOTE
You can use the &Y command to select a user profile. The
setting takes effect immediately. When you reset or power up
the modem, it restores the last user profile setting selected.