AT Command Set Operation
AT Command Reference Tables
060R122-000
SpectraComm Dual V.34 Modem
4-17
Issue 15
Installation and Operation
S
n
S-Registers (continued)
Controls the S-Registers which store values for functions that are not often changed.
Retransmit counter
S70
Stores and determines how many times (0-255) the modem will retransmit any one
frame when noise is disrupting the reception of a frame and causing data errors. The
modem hangs up after it has retransmitted up to the counter limit. The default is 100.
Use higher limits only when telephone lines are extremely noisy. In such conditions,
although the connection delay may be undesirable, the modem will not hang up
prematurely.
Transmit level
S100
Only configurable in those countries, such as the United States, that do not limit
transmit level selections
When you issue the command
S100?
the value displayed in this register is the
transmit level configured in the modem.
S$
S Register Help
Displays the S-Register Help Menu
&S
n
DSR operation
Controls how the Data Set Ready EIA interchange circuit will operate. The
%D
n
command overrides the functionality of this command during any
ANALOOP
test.
&S0
Selects DSR to remain On and glitch Off for disconnect.
&S1
Causes DSR to be real (per ITU-T).
&S2
Selects DSR to follow carrier detect.
&S3
Selects DSR forced On in all modes.
%S
n
Password operation
Selects what type of password security the modem will enforce. Refer to
for detailed information on combining security commands/options.
%S0
Disables password security.
%S1
Enables SteadFast security in the modem. During the handshake, the originate GDC
modem transmits its cell 0 password; the answer GDC modem attempts a match with
its cell 0 password.
%S2
Enables Online Security in the modem. The answer modem prompts the remote for a
cell password and attempts a match with passwords in cells 0 - 9.
If RADIUS Security is used, this command enables RADIUS. The passwords are
stored in the RADIUS server. Refer to the SCM MAnual, Appendix B for details.
For any modem function that uses
%S2
, it is strongly recommended to option the
modem for
S2=128
.
%S3
Enables both SteadFast and Online Security.
%S4
Enables SteadFast Security with mandatory callback. Pass-through security is
disabled.
%S6
Enables Online Security with manadatory call-back.
%S7
Enables SteadFast Security and Online Security with mandatory call-back.
%S8
Enables AES Encryption only.
%S9
Enables AES Encryption and SteadFast Security.
%S11
Enables AES Encryption, SteadFast Security and RADIUS.
%S16
Enables SAM Authentication only.
%S17
Enables SAM Authentication and SteadFast Security.
For
%S8
,
%S9
, and
%S11
, you must also configure an encryption key (see
%X1
).
For
%S16
and
%S17
, you must also configure SAM parameters (see
%X
n).
Summary of Contents for 060A027-001
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