User manual

TECHNICAL REFERENCE
8-16
&Tn Begins test modes.
&T0 Ends testing
&T1 Analog Loopback
&T2 Reserved
&T3 Local Digital
Loopback
&T4 Enables Remote
Digital Loopback
&T5 Prohibits Remote
Digital Loopback
&T6 Initiates Remote
Digital Loopback
&T7 Remote Digital with
self-test and error
detector
&T8 Analog Loopback
with self-test and
error detector
&Un When set above 0, the value
chosen from the table sets the
floor connect speed (the lowest
acceptable connect speed). If a
connection cannot be made at or
above this speed, the modem will
hang up. This command can also
be used in conjunction with &Nn.
NOTE: &U17 through &U39
apply only to V.90 products.
$N=0 &N>0
&U=0 Connects at Connects at a
best possible speed at or below
speed between &Nn.
your modem and
the remote modem.
NOTE: These
factory default
settings should
be sufficient for
most users.
&U>0 Connects at any Connects at any
speed faster than speed between &Nn
the value of &Un. and &Un.