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Table of Contents - Cirrus Logic Chip Set
1**Extended AT Command Set
2**V.42/V.42 bis MNP AT Commands
3**Fax Class 1 AT Commands
4**IS-101 Voice AT Commands
5**AT Command Result Codes
6**S-Registers
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1**Extended AT Command Set**
Data Transmission Commands
AT Commands
A/ ** Re-execute previous command.
A Answer
Bn * Select ITU-T or Bell
B0 Selects ITU-T V.22 at 1200bps and Bell 103J at 300bps
B1 Selects Bell 212A at 1200bps and Bell 103J at 300bps (default)
B2 Selects ITU-T V.23 only. The originating modem transmits at
75 bps (and receives at 1200 bps); the answering modem
receives at 75 bps (and transmits at 1200 bps)
B3 Selects ITU-T V.23 only. The originating modem transmits at
1200 bps (and receives at 75 bps); the answering modem
receives at 1200 bps (and transmits at 75 bps)
Cn Carrier control Option.
C0 Transmit carrier always off
C1 Normal transmit carrier (default)
D Dial command
P Select pulse dialing; affects current and subsequent dialing.
T Select tone dialing; affects current and subsequent dialing.
En * Command echo
E0 Disables echo.
E1 Enables echo (default).
Fn On-Line Echo Command
F0 Enables online echo
F1 Disables online echo (default)
Hn Switch hook Control
H0 (Default) Hangs up the telephone line.
H1 Picks up the telephone line
In Indentification/checksum option
I0 Reports product code (default)
I1 Reports modem chip firmware version
I2 Verifies ROM checksum
I3 Reports chipset name
I4 Reserved
I5 Reserved for modem chip hardware configuration
I6 Country code
I7 Version of board manufacturer firmware
I8 Features of modem firmware
I10 Modem board configuration-bits set by board manufacturer
I11 Modem board configuration-bits set by board manufacturer
I14 SAFE device
I20 Cirrus Logic silicon version
I21 Cirrus Logic firmware version
I22 Cirrus Logic manufacturer name
I23 Cirrus Logic product model
Ln * Speaker volume
L0 Off or Low speaker volume
L1 Low volume.
L2 Medium volume (default)
L3 High volume.
Mn * Speaker control
M0 Speaker is always off.
M1 Speaker is on until carrier present (default)
M2 Speaker is always on.
M3 Speaker is off during dialing; speaker on until until carrier
present
Nn * Select data rate handshake
N0 Handshake only at DTE-to-modem data rate
N1 Begins handshake at DTE-to-modem data rate and falls to
highest compatible rate (default)
On Go online
O0 Returns modem to data mode (default)
O1 Retrains equalizer and then returns to data mode
P * Select pulse dialing
Qn * Result code display control
Q0 Enables result codes (default)
Q1 Disables result codes
Sn Select an S-register. n=0-37
Sn=x Write to an S-register. n=0-37 x=0-255
Sn? Reads from an S-register. n=0-37
T * Selects Tone Dialing
Vn * Result code form
V0 Choose numeric form
V1 Chose verbose (text) form (default)
Wn * Response code data rate
W0 Reports DTE speed response codes (default)
W1 Reports DTE speed response codes
W2 Reports DCE speed response codes
W3 Reports DTE speed response codes and information on error
correction and data compression
W4 Reports protocol, data compression, and DTE data rate.
Xn * Result code type
X0 Enables result codes 0-4; disables detection of busy and dial
tone.
X1 Enables result codes 0-5,10, and above; disables busy and dial
tone detection.
X2 Enables result codes 0-6 and 10 and above; disables busy
detection and enables dial tone detection
X3 Enables result codes 0-5,7, and 10 and above; enables busy
detection and disables dial tone detection
X4 Enables result codes 0-7 and 10 and above; disables busy
detection and disables dial tone detection (default)
Yn * Long space disconnect
Y0 Disables long space disconnect (default)
Y1 Enables long space disconnect
Zn Recall stored profile
Z0 Resets modem and recalls user profile 0 (default)
Z1 Resets modem and recalls user profile 1.
&Cn * Data Carrier Detect (DCD) option
&C0 Ignores remote modem status; DCD always on
&C1 DCD set according to remote modem status (default)
&Dn Data Terminal Ready (DTR) option
&D0 In async mode, DTR is ignored.
&D1 Modem switches from data mode to command mode when an on-to-
off transition of DTR occurs.
&D2 When DTR switches off, the modem goes on-hook and disables
auto-answer mode; when DTR switches on, auto-answer is
enabled (default)
&D3 Turning off DTR re-initializes the modem and resets values
except UART registers
&F Load factory defaults
&Gn * Guard tone option
&G0 Disables guard tone (default).
&G1 Enables 550-Hz guard tone.
&G2 Enables 1800-Hz guard tone.
&Jn * Auxiliary relay control
&J0 Auxiliary relay never operated (default)
&J1 Activates auxiliary relay when modem is off-hook
&Kn Select serial port flow control.
This command selects the flow control method chip set provides to the
DTE to prevent the modem's buffer from overflowing with data. A data
buffer holds the data until the modem is ready to transmit it. When
the data buffer is full, flow control instructs the DTE to stop
sending to the modem while the modem continues to send characters.
&K0 Disables flow control
&K3 Bidirectional hardware flow control (default).
&K4 Enables XON/XOFF software flow control.
&M0 * Communication mode option-modem supports only async mode
&Pn * Dial pulse ratio
&P0 Sets 10-pps pulse dial with 39%/61% make-break (default)
&P1 Sets 10-pps pulse dial with 33%/67% make-break
&Q0 * Communication mode option-modem supports only async mode
&Sn * DSR (Data Set Ready) option
&S0 DSR is always active (default).
&S1 DSR active only during handshaking and when carrier is lost
&Tn Self test commands
&T0 Terminates test in progress
&T1 Initiates local analog loopback
&T3 Initiates local digital loopback
&T4 Grants RDL (remote digital loopback) request from remote
modem
&T5 Denies RDL request from remote modem
&T6 Initiates remote digital loopback (RDL)
&T7 Starts remote digital loopback with self-test
&T8 Initiates local analog loopback with self-test
&Un * Disable Trellis coding
&U0 Enables Trellis coding with QAM as fallback (default)
&U1 QAM Modulation only
&Vn View active and stored profiles
&V0 View stored profile 0 (default)
&V1 View stored profile 1
&V3 View relay and general-purpose input-output status
&Wn Store active profile
&W0 Store in user profile 0.
&W1 Store in user profile 1.
&Yn * Select stored profile on power up
&Y0 Recall stored profile 0 on power-up (default)
&Y1 Recall stored profile 1 on power-up
&Zn=x Store telephone number (up to 30 digits) to location 'n'
n = 0-3.
x = dial string (0-9 A B C D # * T P R W @ , ! ;)
%En * Auto-retrain control
%E0 Disables auto-retrain (default)
%E1 Enables auto-retrain
%Gn * Rate renegotiation
%G0 Disabled (default).
%G1 Enabled.
-Cn * Generate data modem calling tone
-C0 Calling tone disabled
-C1 1300-Hz calling tone enabled
-C2 V.8 calling tone and 1300-Hz calling tone
+GMI?***Identify modem manufacturer
+GMM?***Identify product model
+GMR?***Identify product version
+MS=m***Modulation selections
m=X2, 1, 300, 0
See full command description in the CL-MD56XX Programmer's Guide for parameter ranges.
For data modes, the factory default settting is AT+MS=x2, 1, 300, 0 to send at speed of
31,200 or below and receive at speed of 53,333 bps and below
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* denotes value saved in NVRAM
** denotes command not preceded by an 'AT'
*** denotes command works only on 56K modem
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2**V.42/V.42 bis MNP AT Commands**
%An * Set auto-reliable fallback character (default=13)
n=0-127
%Cn * MNP 5 data compression control
%C0 No compression
%C1 Enables MNP 5 data compression (default)
\An * MNP block size
\A0 Max 64 characters.
\A1 Max 128 characters.
\A2 Max 192 characters.
\A3 Max 256 characters (default).
\Bn * Transmit break
n=0-9
\Cn * Set auto-reliable buffer
\C0 No data buffering (default)
\C1 Four second buffer until 200 characters in the buffer or
detection of a SYN character
\C2 No buffering. Connects non-V.42 modems to V.42 modem
\Gn * Set modem port flow control
\G0 Disables modem port flow control (default).
\G1 Sets port flow control to XON/XOFF
\Jn * bps rate adjust control
\J0 Disables rate adjust (default).
\J1 Enables rate adjust
\Kn * Set Break control
In connect state, transmits break to remote (if in reliable mode)
\K0, 2, 4 Enters command mode; no break sent
\K1 Destructive/expedited
\K3 Nondestructive/expedited
\K5 Nondestructive/nonexpedited (default).
In command state, transmits break to remote (if in reliable mode)
\K0, 1 Destructive/expedited
\K2, 3 Nondestructive/expedited
\K4, 5 Nondestructive/nonexpedited
In connect state, receives break at modem port (if in direct mode)
\K0, 2, 4 Immediately sends break and enters command state
\K1, 3, 5 Immediately sends the break through
In connect state, receives break at modem port & sends to serial port
\K0, 1 Destructive/expedited
\K2, 3 Nondestructive/expedited
\K4, 5 Nondestructive/nonexpedited
\Nn * Set operating mode
\N0, 1 Selects Buffer (Normal) mode with speed buffering
\N2 MNP reliable (error-correction) mode.
\N3 Selects V.42 auto-reliable mode (default)
\N4 Selects V.42 reliable mode
\O Originate reliable link
\Qn * Set serial port flow control
\Q0 Disables flow control.
\Q1 XON/XOFF software flow control.
\Q2 Unidirectional hardware flow control
\Q3 Bidirectional hardware flow control (default)
\Tn Set inactivity timer
n=0 Disable inactivity timer (default).
n=1-90 Length in minutes.
\U Accept reliable link
\Xn * Set XON/XOFF passthrough option
\X0 Processes flow control characters (default)
\X1 Processes flow control characters & passes to local or remote
\Y Switch to reliable mode
\Z Switch to Normal mode
-Jn * Set V.42 detection phase
-J0 Disables the V.42 detection phase.
-J1 Enables the V.42 detection phase (default).
"Hn * V.42 bis compression control
"H0 Disables V.42 bis
"H1 Enables V.42 bis only when transmitting data
"H2 Enables V.42 bis only when receiving data
"H3 Enables V.42 bis for both transmitting and receiving data
"On V.42 bis string length
n=6-250 (default=32)
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* denotes value saved in NVRAM
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3**Fax Class 1 AT Commands**
+FAE=n Fax/data autorecognition
n=0,1 (default=0)
+FCLASS=1 Mode selection. Range=0, 1, 8, 80 (default=0)
+FRH=n Receive HDLC data. Range=3 (default=none)
+FRM=n Receive data. Range=24, 48, 72, 73, 74, 96, 97, 98, 121,
122, 145, 146 (default=none)
+FRS=n Wait for silence. Range=1-255 (default=none)
+FTH=n Transmit HDLC data. Range=3 (default=none)
+FTM=n Transmit data. Range=24, 48, 72, 73, 74, 96, 97, 98, 121,
122, 145, 146 (default=none)
+FTS=n Stop tranmission and pause. Range=1-255 (default=none)
Fax Indentity Commands
+FMDL? Identifies product model
+FMFR? Identifies modem manufacturer
+FMI? Identifies modem manufacturer
+FMM? Identifies product model
+FMR? Identifies product version number
+FREV? Identifies product version number
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4**IS-101 Voice AT Commands**
Command Function Default Range
-----------------------------------------------------------------------------
+FCLASS=8 Voice mode selection 0 0, 1, 8, 80
+FLO=n Flow Control Select 1 0-2
+VBT=m Buffer threshold setting 192,320 192,320
+VCID=n Caller ID Selection *0 0-2
#VCSD=n Voice command mode silence detection 0 0,1
+VDR=m Distinctive Ring selection 0,0 0-255,
0-255
+VEM=m Event reporting and masking 'C' --
BB860980
BFE63883
BB863EE0
+VGM=n Speakerphone microphone gain 128 121-131
+VGR=n Receive gain selection 128 121-131
+VGS=n Speakerphone speaker gain 128 121-131
+VGT=n Volume selection 128 121-131
+VIP Initialize parameter -- --
+VIT=n DTE/DCE inactivity timer 0 0-255
+VLS=n Relay/speaker control 0 0-16
+VNH=n Automatic hang-up control 0 0-2
+VRA=n Ringback-goes-away timer 50 0-50
+VRN=n Ringback-never-appeared timer 10 0-255
+VRX *** Record mode -- --
+VSD=m *** Silence detection (quiet and silence)128, 50 See note
+VSM=m *** Compression method selection 140, 8000, 0 See note
+VSP=n Speakerphone on/off control 0 0, 1
#VSPS=n*** Speakerphone type selection Manufacturer 0, 1
specified
+VTD=n Beep tone duration timer 100 5-255
+VTS=m *** DTMF and tone generation none See note
+VTX *** Play mode none --
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* Noted parameters, commands, and responses depend on the capability to
receive.
*** denote command for 56K modem
Voice DTE-to-DCE Character Pairs
Response Hex Code Function
--------------------------------------------
<NUL> 00 Do nothing
<DLE> 10 Two contiguous <DLE><DLE> codes indicates a
single <DLE> in the data stream
<SUB> 1A <DLE><DLE> in data stream
<ETX> 03 End transmit data state
/ 2F Start of DTMF tone shielding
~ 7F DTMF transition to off
u 75 Bump up the volume
d 64 Bump down the volume
< ESC> 1B End receive data state
! 21 Receive data abort
<CAN> 18 Clear transmit buffer of voice data
<FS> 1C Concatenate transmit data streams
? 3F Transmit buffer space available query
Voice DCE-to-DTE Character Pairs
Response Hex Code Function
--------------------------------------------
<DLE> 10 Single <DLE> character in the data stream
<SUB> 1A <DLE><DLE> in data stream
<ETX> 3 End of record mode data
X 58 Packet header for 'Complex Event Detection
Report'
. 2E Packet terminator for the 'Complex Event
Detection Report'
/ 2F Start of DTMF tone shielding
~ 7E DTMF transition to off
0-9 30-39 DTMF tones 0-9
A-D 41-44 DTMF tones A-D
* 2A DTMF tone *
# 23 DTMF tone #
o 6F Receive buffer overrun
c 63 1100-Hz fax calling tone
e 65 1300-Hz data calling tone
h 68 Local phone goes on hook
H 48 Local phone goes off hook
s 73 Presumed hang-up silence time-out
l 6C Loop current interruption
L 4C Loop current polarity reversal
r 72 Ringback
b 62 Busy/reorder/fast busy
d 64 Dial tone detected
u 75 Transmit buffer under-run
p 70 Line voltage increase (extension phone
goes on-hook)
p 50 Line voltage decrease (extension phone
goes off-hook)
a 61 Fax or data answer tone (2100 Hz)
f 66 Data answer detected (2225 Hz)
R 52 Incoming ring
%' (,) 25, 26, 27 Manufacturer-specified
28,29
V.80 Videoconferencing Mode Commands
Command Fuction Default Range
--------------------------------------------------------------------------------
FCLASS=0 Mode selection 0 0,1, 8, 80
+A8E=M V.8 & V.8 bis operation 1, 1, C1, 0, , See note
+ES=m Error control selection 3, 0, 2 See note
+ESA=m Synchronous access 0, 0, 1, , 0, 0, 126 See note
mode configuration
+ITF=m Transmit flow control 320, 192, 0 See note
thresholds
+8-bit in-band In-band commands and none see note
controls: indications for use in
<EM><hex code> asynchronous access mode only
Dial Modifiers
Command Function
----------------------------------------------------------------------------
0 to 9 Dialing digits
A, B, C, D, *, # Tone dial characters
P Pulse dial
R Reserse originate mode
S=n Dial NVRAM telephone number
T Wait for dial tone
, Pause
! Flash hook
@ Wait for quiet answer
; Return to idle state
-() Ignored by modem
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5**AT Command Result Codes**
Numeric
Code Verbose Code
---------------------
0 OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5 CONNECT 1200
6 NO DIAL TONE
7 BUSY
8 NO ANSWER
23 CONNECT 75/1200
22 CONNECT 1200/75
10 CONNECT 2400
11 CONNECT 4800
24 CONNECT 7200
12 CONNECT 9600
25 CONNECT 12000
13 CONNECT 14400
59 CONNECT 16800
14 CONNECT 19200
61 CONNECT 21600
62 CONNECT 24000
63 CONNECT 26400
64 CONNECT 28800
65 CONNECT 31200
33 FAX (33.6k modem)
CONNECT 33333 (56K modem)
66 CONNECT 33600 (56K modem)
34 CONNECT 37333 (56K modem)
28 CONNECT 38400 (56K modem)
35 CONNECT 41333 (56K modem)
35 DATA
36 CONNECT 42666 (56K modem)
37 CONNECT 44000 (56K modem)
38 CONNECT 45333 (56K modem)
39 CONNECT 46666 (56K modem)
42 CONNECT 48000 (56K modem)
43 CONNECT 49333 (56K modem)
53 CONNECT 50666 (56K modem)
54 CONNECT 52000 (56K modem)
55 CONNECT 53333 (56K modem)
56 CONNECT 54666 (56K modem)
57 CONNECT 56000 (56K modem)
58 CONNECT 57333 (56K modem)
18 CONNECT 57600
31 CONNECT 115200
45 RINGBACK
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* Noted parameters, commands, and responses depend on the capability to
receive
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6**S-Registers**
No. Function Range Units Default
*0 Rings to auto-answer on 0-255 ring 0
1 Ring count 0-255 ring 0
*2 Escape character 0-127 ASCII 43
3 Carriage-return character 0-127 ASCII 13
4 Line-feed character 0-127 ASCII 10
5 Backspace character 0-32, 127 ASCII 8
*6 Wait before dialing 2-255 second 2
*7 Wait for carrier 1-255 second 60
*8 Pause time for dial modifier 0-255 second 2
*9 Carrier recovery time 1-255 0.1 s 6
*10 Lost carrier hang up delay 1-255 0.1 s 14
*11 DTMF dialing speed 50-255 0.001 s 70
*12 Guard time 0-255 0.02 s 50
*14 Bit-mapped options _ _ 170
16 Modem test options _ _ 0
*18 Modem test timer 0-255 second 0
*21 Bit-mapped options _ _ 48
*22 Bit-mapped options _ _ 118
*23 Bit-mapped options _ _ none
*25 Detect DTR change 0-255 0.01 s 5
*27 Bit-mapped options _ _ 64
*30 Disconnect inactivity timer _ _ 0
*31 Bit-mapped options _ _ none
*33 Sleep mode timer 0-90 second 10
*37 Maximum line speed attempted 0-19 _ 0
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* Value saved in NVRAM
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Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.