ZyXEL Communications U-336SA - Manual (Page 113)

AT Command Set Summaries 99
Command Options Function & Description Ref.
TSS). (See also S41.5, S44.4)
&Tn Modem testing. S16
&T0 Terminate test in progress.
&T1 Initiate Analog Loop-back (ALB)
test.
&T3 Initiate Local Digital Loop-back
(LDL) test
&T4 Grant Remote Digital Loop-back
request from remote modem S14.1
&T5 Deny Remote Digital Loop-back
request from remote modem S14.1
&T6 Initiate Remote Digital Loop-back
(RDL) test
&T7 Initiate Remote Digital Loop-back
with self test (RDL+ST)
&T8 Initiate Analog Loop-back with self
test. (ALB+ST)
&Vn View profile settings.
&V0 View current active settings.
&Vn View the (n-1) user profile settings
(n=1-4)
&V5 View factory default settings.
&Wn n=0-3 Write current settings to user profile n
in non-volatile RAM. (See also
S35.6)
&Xn Synchronous mode timing (clock)
source selection S14.4-5
&X0 * Modem provides synchronous
transmit clock signal (Internal clock to
pin 15 of EIA-232D)