V.22 bis Modem with AT Commands
CMX866
Sn?
S-Register Read
Command for displaying the contents of an S-Register (See S-Register Table).
Syntax: ATSn?<CR>
where n is the S-Register to be interrogated (decimal).
Value returned is either in decimal or hex (default) format depending on the setting
of Bit 4 in the S14 register. Note that a ? command on its own is invalid.
Sn=x
S-Register Write
Command for writing to an S-Register (See S-Register Table).
Syntax: ATSn=x<CR>
where n is the S-Register (decimal) and x is the value to be written (decimal, 0-
255). Note that a =x command on its own is invalid.
Vn
Result Code Format
Syntax: ATVn<CR>
Modifier Usage
n=0 Instructs the CMX866 to display result codes as numbers (default).
n=1 Instructs the CMX866 to display result codes as words.
Xn
Calling Characteristics
Determines which set of responses and calling characteristics are used.
Syntax: ATXn<CR>
Modifier Usage
n=0 The CMX866 will ignore dial tones and busy tones. Dial tone wait time is zero,
and blind dialling is enabled after the delay in register S6. The CMX866 returns a
CONNECT xxxx result code when a connection is established, where xxxx is the
Tx/Rx line speed, otherwise it returns a NO CARRIER result code.
n=1 The CMX866 waits for a dial tone before dialling but will ignore busy tone. If a
dial tone is not detected within the time in register S6, a NO DIAL TONE result
code is returned. The CMX866 returns a CONNECT xxxx result code when a
connection is established, where xxxx is the Tx/Rx line speed, otherwise it returns
a NO CARRIER result code.
n=2 The CMX866 will ignore dial tone. If busy tone is detected, a BUSY result
code is returned. Blind dialling is enabled after the delay in register S6. The
CMX866 returns a CONNECT xxxx result code when a connection is established,
where xxxx is the Tx/Rx line speed, otherwise it returns a NO CARRIER result
code.
n=3 If a dial tone is not detected within the time in register S6, a NO DIAL TONE
result code is returned. If a busy tone is detected, a BUSY result code is returned.
The CMX866 returns a CONNECT xxxx result code when a connection is
established, where xxxx is the Tx/Rx line speed, otherwise it returns a NO
CARRIER result code (default).
Z
Factory Reload
Reloads the factory default S-Register settings (See S-Register Table).
Syntax: ATZ<CR>
ã 2004 CML Microsystems Plc
22
D/866/4
CMLMICRO [ CML MICROCIRCUITS ]
