Command

Function

Operating Mode

This command controls the preferred error correcting mode to be negotiated in a subsequent data connection.

Syntax

\N<mode>

Defined Values

<mode> Decimal number which corresponds to the selected mode.

 

0	Selects normal speed buffered mode (disables error-correction mode) and forces &Q6 (selects asynchronous operation in normal mode.)
1	Same as \N0.
2	Selects reliable (error-correction) mode and forces &Q5 (the modem will try to negotiate an error corrected link). The modem will first attempt a LAPM connection and then an MNP connection. Failure to make a reliable connection results in the modem hanging up.
3	Selects auto reliable mode and forces &Q5 (the modem will try to negotiate an error corrected link). This operates the same as \N2 except failure to make a reliable connection results in the modem falling back to the speed buffered normal mode.
4	Selects LAPM error-correction mode and forces &Q5 (the modem will try to negotiate an error corrected link). Failure to make an LAPM error-correction connection results in the modem hanging up.
5	Selects MNP error-correction mode and forces &Q5 (the modem will try to negotiate an error corrected link). Failure to make an MNP error-correction connection results in the modem hanging up.

Result Codes

OK <mode> = 0 to 5.
ERROR Otherwise.

Command

Function

Data carrier detect (DCD) signal

&Dn

DTR Option

This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter supplied.

&D0

&D1

&D2

&F

Restore Factory Configuration (Profile)

&F

&Gn

Select Guard Tone

This command is included for compatibility only and has no effect other than returning an OK result code.

Syntax

&G[<value>] n = 0 - 2.

Defined Values

<value> Decimal number corresponding to the selected option.
0 Included for cmpatibility only and has no effect other than returning an OK result code. (Default.)
1 Included for compatibility only and has no effect other than returning an OK result code.
2 Included for compatibility only and has no effect other than returning an OK result code.

Result Code

OK <value> = 0 to 2.
ERROR Otherwise.

&K[<value>]

&M[<mode>]

Defined Values

<mode > Decimal number corresponding to the selected value: 0-3.

Result Codes

OK <mode> = 0 to 3.
ERROR Otherwise.

&Pn

Select Pulse Dial Make/Break Ratio

This command determines the make/break ratio used during pulse dialing.

&P0

Selects 39%-61% make/break ratio at 10 pulses per second.

&P1

Selects 33%-67% make/break ratio at 10 pulses per second.

&P2

Selects 39%-61% make/break ratio at 20 pulses per second.

&P3

Selects 33%-67% make/break ratio at 20 pulses per second.

&Q[<mode>]

Defined Values

<mode > Decimal number corresponding to the selected mode:
0 Selects asynchronous operation in normal mode (speed buffering)
1 Selects asynchronous operation in normal mode (speed buffering)
2 Selects asynchronous operation in normal mode (speed buffering)
3 Selects asynchronous operation in normal mode (speed buffering)
6 Selects asynchronous operation in normal mode (speed buffering).

Result Codes

OK <mode > = 0-3, 6.
ERROR Otherwise.

&V

Display Current Configuration and Stored Profiles

Reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone numbers. The stored profiles and telephone numbers are not displayed if the NVRAM is not installed or is not operational as detected by the NVRAM test during reset processing.

Example:

AT&V
ACTIVE PROFILE:
E1 L1 M1 Q0 T V1 X4 &C1 &D2 &G0 &P0
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:004 S07:050 S08:004
S10:014 S12:050 S29:070

STORED PROFILE 0:
E1 L1 M1 Q0 T V1 X4 &C1 &D2 &G0 &P0
S00:000 S02:043 S06:004 S07:050 S08:002 S10:014 S12:050 S29:000

OK

&Wn

Store Current Configuration

Saves the current (active) configuration (profile), including S-Registers, in the user profile in NVRAM as denoted by the parameter value. This command will yield an ERROR message if the NVRAM is not installed or is not operational as detected by the NVRAM test.

The current configuration is comprised of a list of storable parameters illustrated in the &V command. These settings are restored to the active configuration upon receiving an Z command or at power up.

&W0

Store the current configuration as profile 0.

Command

Function

%C[<value>]

Defined Values

<value> A decimal number corresponding to the selected option:
0 Disables data compression.
1 Enables both V.42 bis and MNP 5 data compression.
2 Enables both V.42 bis and MNP 5 data compression.
3 Enables both V.42 bis and MNP 5 data compression. (Default.)

Result Codes:

OK <value> = 0, 1, 2, or 3.
ERROR Otherwise.

Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward

Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back when line quality is insufficient or fall forward when line quality is sufficient (%E2). If enabled, the modem attempts to retrain for a maximum of 30 seconds. 

This command controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or a rate renegotiation when line quality merits a change. If enabled, the modem attempts to retrain for a maximum of 30 seconds. 
Syntax

%E[<value>]

Defined Values

<value> A decimal number corresponding to the selected option: 

0 = Disable line quality monitor, auto-retrain, and auto-rate renegotiation. 
1 = Enable line quality monitor, auto-retrain, and auto-rate renegotiation. (Default.)

Result Code

OK <value> = 0 and 1 
ERROR Otherwise.

Command

Function

+FCLASS=<mode>

Defined Values

<mode> Decimal number which corresponds to the selected service class. 
Command options:&nb;

0 Select Data Mode (see Section 3). (Default.) 
1 or 1.0 Select Facsimile Class 1.0 Mode (see Section 4) 
8 Select Voice Mode (see Section 5) 

Result Codes
OK For <mode> = 0, 1, 1.0, and 8 as supported by the Product Configuration File. 
ERROR Otherwise. 
Reporting Current or Selected Values
Command: +FCLASS? 
Response: +FCLASS: <mode> 
Example: +FCLASS: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +FCLASS=? 
Response: +FCLASS: (<mode> range) 
Example: +FCLASS: (0, 1,1.0,8, 80)

+GMI

Response

+GMI: Rockwell 
OK

+GMM

Typical Response

+GMM: SoftK56 Data,Fax,Speakerphone PCI Modem
OK

+GMR

Typical Response

+GMR: 1.44 
OK

+GSN

Typical Response

VX.XXX-serial number 
OK

+GOI

Typical Response

+GOI: 
OK

+GCAP

Example Responses
+GCAP: +FCLASS, +MS, +ES, +DS, for a data modem that supports all capabilities listed 
Where: 
+FCLASS   T.class1, +F (Class 1 Facsimile modem Control) 
+MS           +M commands (Modulation Control: +MS and +MR commands) 
+ES            +E commands (Error Control: +ES, +EB, +ER, +EFCS, +ETBM) 
+DS           +D commands (Data Compression: +DS and +DR)

+IFC=[<modem_by_DTE>[,<DTE_by_modem>]]

Defined Values
<modem_by_DTE> Specifies the method to be used by the DTE to control the flow of received data from the modem. 

0 = None. 
1 = XON/XOFF on transmitted data (XON/XOFF on transmit data); do not pass XON/XOFF characters to the remote modem. 
2 = Circuit 133 (Ready for Receiving). (Default.) 

<DTE_by_modem> Specifies the method to be used by the modem to control the flow of transmitted data from the DTE. 

0 = None. 
1= XON/XOFF on received data. 
2 = CTS/RTS. (Default.)

Reporting Current or Selected Values
Command: +IFC? 
Response: +IFC: <modem_by_DTE>,<DTE_by_modem> 
Example: +IFC: 2,2 for the defaults. 
Reporting Supported Range of Parameter Values
Command: +IFC=? 
Response: +IFC: (<modem_by_DTE> range),(<DTE_by_modem> range) 
Example: +IFC: (0-3),(0-2)

+ILRR=<value>

Defined Values
<value> Decimal number corresponding to the selected option. 

0 Disables reporting of local port rate (+ILRR: is not transmitted). 
1 Enables reporting of local port rate (+ILRR: is transmitted).

Reporting Current or Selected Values
Command: +ILRR? 
Response: +ILRR: <current value> 
Example: +ILRR: 0 For the default setting 
Reporting Supported Range of Parameter Values
Command: +ILRR=? 
Response: +ILRR: (<value> range) 
Example: +ILRR: (0,1) 
Reported Rate
The <rate> reported represents the current (negotiated or renegotiated) DTE-modem rate. If enabled, the intermediate result code is transmitted after any modulation, error control or data compression reports are transmitted, and before any final result code (e.g., CONNECT) is transmitted. The <rate> is applied after the final result code is transmitted. 
The DTE-modem port rate will change only if neither buffered mode nor error controlled means are enabled (+ES=x,0) and if the negotiated carrier rate (+MRR) does not match the current DTE-modem port rate (autodetected from the previous command line). 
Syntax

+ILRR: <rate>[,<rx_rate>]

Defined Values

<rate> Decimal value representing the current (negotiated or renegotiated) DTE-modem rate: 0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200 
<rx_rate> Optional decimal value reporting the RXD rate, if it is different from the TXD rate: 0, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200

Example

+ILRR: 19200

+ETBM=[<pending_TD>[,<pending_RD>[,<timer>]]]

Defined Values

 

<pending_TD>	Decimal number 0 specifying that disconnect will occur immediately and all buffered transmit data will be discarded when the local DTE requests call disconnection.
<pending_RD>	Decimal number 0 specifying that disconnect will occur immediately and all buffered receive data will be discarded when the local DTE requests call disconnection.
<timer>	Decimal number 0 specifying that the modem will not attempt to deliver the buffered data before abandoning the attempt and discarding remaining data.

Reporting Current or Selected Values
Command: +ETBM? 
Response: +ETBM: <pending_TD>,<pending_RD>,<timer> 
Example: +ETBM: 0,0,0 
Reporting Supported Range of Parameter Values
Command: +ETBM=? 
Response: +ETBM: (<pending_TD> range),(<pending_RD> range), (<timer> range) 
Example: +ETBM: (0),(0),(0)

+ER=[<value>]

Defined Values

<value> A decimal number corresponding to the selected error control option: 

0 = Error control reporting disabled (no +ER intermediate result code transmitted). 
1 = Error control reporting enabled (+ER intermediate result code transmitted). (Default.)

Reporting Current or Selected Values
Command: +ER? 
Response: +ER: <current value> 
Example: +ER: 1 for the default setting 
Reporting Supported Range of Parameter Values
Command: +ER=? 
Response: +ER: (<value> range) 
Example: +ER: (0,1) 
+ER: <type>
The +ER: <type> reported represents the current (negotiated or renegotiated) modem-modem error control type. If enabled, the intermediate result code is transmitted at the point during error control negotiation (handshaking) at which the modem has determined which error control protocol will be used (if any), before the final result code (e.g., CONNECT) is transmitted. The format of this result code is: 
The +ER intermediate result code, if enabled, is issued after the Modulation report (+MCR and +MRR) and before the Data Compression Report (+DR). 
Syntax

+ER: <type>

Defined Values

<type> An alphanumeric code corresponding to the selected protocol. 

NONE Error control is not in use. 
LAPM V.42 LAPM protocol is in use. 
ALT MNP is in use.

Example

+ER: LAPM

+MR=[<value>]

Defined Values

<value> A decimal number corresponding to the selected option: 

0 = Disables reporting of modulation connection (+MCR: and +MRR: are not transmitted). 
1 = Enables reporting of modulation connection (+MCR: and +MRR: are transmitted). (Default.)
2= Enables reporting of modulation connection (+MCR: and Receive Rate Only: are transmitted).

Reporting Current or Selected Values
Command: +MR? 
Response: +MR: <current value> 
Example: +MR: 1 For default setting 
Reporting Supported Range of Parameter Values
Command: +MR=? 
Response: +MR: (<value>range) 
Example: +MR: (0,1,2)

+ES=[<orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]

Defined Values

<orig_rqst> Decimal number which specifies the initial requested mode of operation when the modem is operating as the originator. The options are: 

1 Initiate call with Normal Mode (also referred to as Buffered Mode or Direct Mode) only. 
2 Initiate V.42 without Detection Phase. If V.8 is in use, disable V.42 Detection Phase. 
3 Initiate V.42 with Detection Phase. (Default.) 
4 Initiate MNP. 
6 Initiate V.80 Synchronous Access Mode when connection is completed, and Data State is entered. (See +ESA and +ITF commands.)

<orig_fbk> Decimal number which specifies the acceptable fallback mode of operation when the modem is operating as the originator. 

0 LAPM, MNP, or Normal Mode error control optional. (Default.) 
2 LAPM or MNP error control required; disconnect if error control is not established. 
3 LAPM error control required; disconnect if error control is not established. 
4 MNP error control required; disconnect if error control is not established.

<ans_fbk> Decimal number which specifies the acceptable fallback mode of operation when the modem is operating as the answerer or specifies V.80 Synchronous Access Mode. 

1 Error control disabled, use Normal Mode. 
2 LAPM, MNP, or Normal Mode error control optional. (Default.) 
4 LAPM or MNP error control required; disconnect if error control is not established. 
5 LAPM error control required; disconnect if error control is not established. 
6 MNP error control required; disconnect if error control is not established. 
8 Initiate V.80 Synchronous Access Mode when connection is completed, and Data State is entered (see +ESA and +ITF commands).

Examples

+ES=6 Enable V.80 Synchronous Access Mode originator 
+ES=,,8 Enable V.80 Synchronous Access Mode answerer 
+ES=6,,8 Enable V.80 Synchronous Access Mode originator and answerer 
+ES=3 Enable V.42 with Detection Phase originator. Disable V.80 Synchronous Access Mode originator. 
+ES=,,2 Allow LAPM, MNP, or Normal Mode connection answerer. Disable V.80 Synchronous Access Mode answerer. 
+ES=3,,2 Enable V.42 with Detection Phase originator, allow LAPM, MNP, or Normal Mode connection answer. Disable Synchronous Access Mode originator and answerer.

Reporting Current or Selected Values
Command: +ES? 
Response: +ES: <orig_rqst>,<orig_fbk>,<ans_fbk> 
Example: +ES: 3,0,2 For default settings. 
+ES: 6,0,8 For V.80 Synchronous Access Mode originator and answerer. 
Reporting Supported Range of Parameter Values
Command: +ES=? 
Response: +ES: (<orig_rqst> range),( <orig_fbk> range), (<ans_fbk> range) 
Example: +ES: (1-4,6),(0,2-4),(1-2, 4-6,8)

+EB=[<break_selection>[,<timed>[,<default_length>]]]

Defined Values

<break_selection> Decimal number 0 specifying that break is to be ignored, i.e., not signaled to remote DCE. 
<timed> Decimal number 0 specifying that any transmitted V.42 L-SIGNAL will not indicate break signal length 
<default_length> Decimal number 0 specifying that break is not delivered to the DTE.

Reporting Current or Selected Values
Command: +EB? 
Response: +EB: <break_selection>,<timed>,<default_length><CR> 
Example: +EB: 0,0,0 For default settings. 
Reporting Supported Range of Parameter Values
Command: +EB=? 
Response: +EB: (<break_selection> range),(<timed> range), (default_length> range) 
Example: +EB: (0),(0),(0)

+ESR=[<value>] Decimal number 0 specifying that SREJ is not used.

Example: 

+ESR: (0) For default settings.

+EFCS=[<value>]

Defined Values

<value> Decimal number 0 specifying the use of the 16-bit FCS specified in V.42.

Reporting Current or Selected Values
Command: +EFCS? 
Response: +EFCS: <value> 
Example: +EFCS: 0 For default setting. 
Reporting Supported Range of Parameter Values
Command: +EFCS=? 
Response: +EFCS: (<value> range) 
Example: +EFCS: (0)

+A8E=<v8o>,<v8a>,<v8cf>[,<v8b>][,<cfrange>][,<protrange>]

Defined Values

<v8o> Decimal number which enables/disables issuance of +A8 x indications during modem-controlled V.8 origination negotiation 

1 = Enable DCE-controlled V.8 origination negotiation without +A8x indications. (Default.) 
6 = Enable DCE-controlled V.8 origination negotiation with +A8 x indications.

<v8a>= Decimal number which enables/disables issuance of +A8 x indications during modem-controlled V.8 answer negotiation. 

1 = Enable DCE-controlled V.8 answer negotiation without +A8x indications. (Default.) 
5 = Enable DCE-controlled V.8 answer negotiation with +A8 x indications.

<v8c>= Set the V.8 CI signal call function to the hexadecimal octet value X. 

<v8b>= Decimal number which enables/disables V.8bis negotiation. 

0 = Disable V.8bis negotiation. (Default.) 
1 = Enable DCE-controlled V.8bis negotiation. 
2 = Enable DTE-controlled V.8bis negotiation.

<cfrange>= “<string of values>“. Applicable only for <v8a>=5 (not supported). 
< protrange >= “<string of values>“. Applicable only for <v8a>=5 (not supported).

Default values: 1,1,,1,"","" 
The ATD and ATA commands behave as specified in §6.3.1/V.25ter and §6.3.5/V.25ter, respectively, and +A8n indications are not generated by the modem. 
For subparameter values <v8o>=6 and <v8a>=5, the +A8I, +A8C, +A8A, +A8J, and +A8M indications are issued during the course of the V.8 session to notify the DTE when the relevant V.8 signals are received. The modem controls the V.8 ession, however, and the +A8M command is not used. 
Reporting Current or Selected Values
Command: +A8E? 
Response: +A8E: <v8o>,<v8a>,<v8cf> [,<v8b>] [,<cfrange>] [,<protrange>] 
Example: +A8E: 1,1,,1,"","" For the defaults 
Reporting Supported Range of Parameter Values
Command: +A8E=? 
Response: +A8E: (<v8o> range),(<v8a> range), (maximum size of v8cf in octets), (<v8b> range),(<cfrange> option bit range),(<protrange> option bit range) 
Example: +A8E: (1,6),(1,5),(1),(0),(1,6),(1)

+A8M=<hexadecimal coded CM or JM octet string>

+A8T=<signal>[,<1st message>] [,<2nd message>] [,< sig_en >] [,<msg_en>] [,<supp_delay>]

Defined Values

<signal> Decimal number which specifies the V.8bis signal (see Table 3-1). 
 

<signal> Value	Description
0	None
1	Initiating MRe
2	Initiating MRd
3	Initiating CRe, low power
4	Initiating CRe, high power
5	Initiating CRd
6	Initiating ESi
7	Responding MRd, low power
8	Responding MRd, high power
9	Responding CRd
10	Responding ESr

<1st message> The transmitted V.8bis message frame(s) is specified as hexadecimal octet coded string (A.4.1). Additional messages are delimited by comma characters. Flag generation, flag transparency 0-bit insertion and FCS generation are performed by the modem. If no data is provided by the DTE, no V.21 carrier is generated beyond that used in segment 2. For two concatenated messages, the modem inserts the required preamble between the first and second messages. 

<2nd message> See <1st message> description. 

<sig_en> Decimal number which specifies enables the modem to search for specified V.8 bis signals: 

0 = Enable detection of initiating signals; 
1 = Enable detection of responding signals; 
2 = Enable detection of both signals.

<msg_en>, Decimal number which disables or enables the modem to search for V.8 bis messages. Note that detection of an ES signal automatically conditions the modem to look for an immediately subsequent V.8 bis message regardless of the setting of <msg_en>; see §A.9.2 

0 = Disables detection of the messages 
1 = Directs the modem to search for V.8 bis messages.

<supp_delay>, Decimal number which disables or enables the modem to insert a 1.5 second delay between the transmitted V.8 bis signal and the subsequent V.8 bis message, if any. 

0 = Disables insertion of a 1.5 second delay. 
1 = Enables insertion of a 1.5 second delay.

Reporting Current or Selected Values
Command: +A8T? 
Response: +A8T: <signal>[,<1st message>] [,<2nd message>] [,< sig_en >] [,<msg_en>] [,<supp_delay>] 
Example: 1,XXXX,YYYY,1,1,1, 
Reporting Supported Range of Parameter Values
Command: +A8T=? 
Response: +A8T: (<signal> range), (max length of message 1), (max length of message 2), (<sig_en> range) 
Example: +A8T: (0-10) (????),(????),(0-1),(0-1)

+A8I:<v8cf><CR>

Defined Values

<v8cf> A hexadecimal code octet representation of those Call Function octet(s). +A8I:0 indicates that the modem timed out waiting for CI.

Example

+A8I:0 The modem timed out waiting for CI. 
+A8I:X YYY

+A8C: <type><CR>

Defined Values

<type> Decimal number which indicates the corresponding detected calling tone. 

0 The modem concluded answer tone transmission without reporting detection of any calling tone. 
1 CNG tone (1100 Hz) detected. 
2 1300 Hz V.25 data modem calling tone detected. 
3 sigC signal: V.32/V.32 bis AA tone detected.

Example

+A8C: 1 For CNG tone detected.

+A8A:<type><CR>

Defined Values

<type><CR> Decimal number which indicates the corresponding detected answer signal. 

0 The modem timed out waiting for an answering signal. 
1 V.8 ANSam signal (2100 Hz with amplitude modulation) detected. 
2 V.25 answer tone (2100 Hz) detected. 
3 V.25 answer tone with phase reversals detected. (Note) 
4 sigA signal: V.21 Ch2 with flags (e.g., T.30 control preamble) detected. 
5 sigA signal: V.22bis USB1 signal detected. 
6 sigA signal: V.32bis AC signal detected. 
7 sigA signal: V.34 ToneA signal detected.

Example

+A8A:1 For V.8 ANSam signal (2100 Hz with amplitude modulation) detected.

+A8J:<value><CR>

Defined Values

<value> Decimal number corresponding to the selected option. 

0 The modem timed out waiting for a CJ signal. 
1 CJ signal sent or detected.

Example

+A8J:1 For CJ sent to a remote terminal.

+A8M:< hex_string>

Defined Values

< hex_string> CM or JM hexadecimal coded string. A +A8M:0 indicates that the modem timed out waiting for a CM or JM signal.

Example

A8M:XXX YYY

+A8R:<signal>[,[<1st message>]] [,<2nd message>]<CR>

Defined Values

<signal> The V.8 bis signal, if detected, is indicated using a <signal> value (see Table 3-1). Values of 4 and 8 are not reported, i.e., the modem is not expected to discern the power level of received CRe and MRd signals. If a V.8 bis message is detected without a preceding V.8 bis signal, the preamble is reported as a 0 <signal> value. 

<1st message> The contents of valid V.8 bis message(s), if detected, are reported using hexadecimal octet coded string(s) (A.4.1). Flag detection and consumption, flag transparency 0-bit deletion and FCS checking are performed by the modem. The modem does not report invalid messages (e.g., bad FCS). If two consecutive messages are detected but the first is invalid, the modem indicates this with no characters between the first and second comma (e.g., +A8R:<signal>,,<2nd message>). 

<2nd message See <1st message>.

Example

+A8R:0,XX,YY For a V.8 bis message detected without a preceding V.8 bis signal. 
+A8R:0,XX,YY For a V.8 bis message detected with a preceding V.8 bis signal.

+ESA=[<trans_idle> [,<framed_idle> [,<framed_un_ov> [,<hd_auto> [,<crc_type> [,<nrzi_en> [,<syn1> [,<syn2>]]]]]]]]

Defined Values

<trans_idle> Decimal number which specifies the bit sequence transmitted by the modem when a transmit data buffer underrun condition occurs, while operating in Transparent sub-Mode. The options are: 

0 In Transparent sub-Mode, modem transmits 8-bit SYN sequence on idle. Modem receiver does not hunt for synchronization sequence (default and fixed).

<framed_idle> Decimal number which specifies the bit sequence transmitted by the modem when a transmit data buffer underrun condition occurs immediately after a flag, while operating in Framed sub-Mode. 
The options are: 

0 In Framed sub-Mode, modem transmits HDLC flags on idle (default and fixed).

<framed_un_ov> Decimal number which specifies the actions undertaken by the modem when a transmit data buffer underrun or overrun condition occurs immediately after a non-flag octet, while operating in 
Framed sub-Mode. 

0 In Frmed sub-Mode, modem transmits abort on underrun in middle of frame. (Default.) 
1 In Framed sub-Mode, modem transmits a flag on underrun in middle of frame, and notifies DTE of underrun or overrun.

<hd_auto> Decimal number which specifies whether or not, in V.34 half-duplex operation, additional procedures besides those specified in § 12/V.34 will be performed by the modem when switching from primary channel to secondary channel operation, and vice versa. This subparameter should not be commanded. 

<crc_type> Decimal number which specifies the CRC polynomial used while operating in Framed sub-Mode. 
The options are: 

0 CRC generation and checking disabled. (Default.) 
1 In Framed sub-Mode, use the 16-bit CRC specified in V.42. 
2 In Framed sub-Mode, use the 32-bit CRC specified in V.42.

<nrzi_en> Decimal number which specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the modem for transmit and receive data. The options are: 

0 NZRI encoding and decoding disabled (default and fixed).

<syn1>, <syn2> Decimal number which specifies the octet value(s) to be used while performing character-oriented framing. <syn1> is to be commanded to 255 (FFh); <syn2> is not to be commanded.

Reporting Current or Selected Values
Command: +ESA? 
Response: +ESA: <trans_idle>, <framed_idle>, <framed_un_ov>, <hd_auto>, <crc_type>, <nrzi_en>, <syn1>, <syn2> 
Example: +ESA: 0,0,0,,0,0,255, For the defaults. 
Reporting Supported Range of Parameter Values
Command: +ESA=? 
Response: +ESA: (<trans_idle> range), (<framed_idle> range), (<framed_un_ov> range), (<hd_auto> range), 
(<crc_type> range), (<nrzi_en> range),(<syn1> range), (<syn2> range) 
Example: +ESA: (0),(0),(0-1), ,(0-2),(0),(255)

+ITF=[<off>[,<on>[,<report_period>]]]

Defined Values

 

<off>	Determines the threshold, in octets, above which the modem will generate a flow off signal. Applicable in Synchronous Access Mode.  The <off> range is 20 -7000. Default <off> value is 128.  For the <on> and <off> subparameters, the input buffer is assumed to reside between the modem’s V.24 interface and the Synchronous Access protocol layer; i.e., the buffer count includes all octets, including EM codes, received from the DTE, with the exception of XON and XOFF if these are used to signal <modem-by-DTE> flow control.  The modem returns the ERROR result code if the DTE specifies that the <off> subparameter be set to a value less than or equal to the <on> subparameter; in this case, the current parameter value settings are set to default values.
<on>	Determines the threshold, in octets, below which the modem will generate a flow on signal. Applicable in Synchronous Access Mode.  The <on> range is 10 -5000. Default <on> value is 64.
<report_period>	Not supported. A fixed value of zero is used and reported.

Reporting Current or Selected Values
Command: +ITF? 
Response: +ITF: <off>,<on>,<report_period> 
Example: +ITF: 128,64,0 For default values 
Reporting Supported Range of Parameter Values
Command: +ITF=? 
Response: +ITF: (<off> range),(<on> range),(<report_period> range) 
Example: +ITF: (20-7000),(10-5000),(0)

+MS=[<carrier> [,<automode> [,<min_tx_rate> [,<max_tx_rate> [,<min_rx_rate> [,<max_rx_rate>]]]]]] 

Notes:

• 1. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at their current values.

Reporting Selected Options
The modem can send a string of information to the DTE consisting of selected options using the following command: 

+MS?

The response is: 

+MS: <carrier>, <automode>, <min_rate>, <max_rate>, <min_rx_rate>, <max_rx_rate>

Note: The current active settings are reported under control of the +MR parameter. 

Example: 

+MS: V90,1,75,33600,75,56000 For default values.

Reporting Supported Options
The modem can send a string of information to the DTE consisting of supported options using the following command: 

+MS=?

The response is: 

+MS: (< carrier> range), (<automode> range), (<min_tx_rate> range), (<max_tx_rate> range), (<min_rx_rate> range), (<max_rx_rate> range)

For example, 

+MS: (B103, B212, V21, V22, V22B, V23C, V32, V32B, V34, K56, V90), (0,1), (75-33600), (75-33600), (75-56000), (75-56000) 
For V.21, V.22, V.22bis, V.32 and V.32bis, with Automode. 

The modem may also automatically switch to another modulation (automode), subject to the following constraints: 

• a. The modem may not be able to automatically switch from the current modulation (specified by <carrier>) to some other modulation. For example, there is no standard way to automode from Bell 103 to V.23.
• b. The DTE may disable automode operation (see <automode>).
• c. The DTE may constrain the range of modulations available by specifying the lowest and highest rates (see <min_tx_rate> and <max_tx_rate> and <min_rx_rate> and <max_rx_rate> below).

Result Code
OK               Valid subparameter string 
ERROR        Otherwise.

Command

Function

%C[<value>]

Defined Values

<value> A decimal number corresponding to the selected option:
0 Disables data compression.
1 Enables both V.42 bis and MNP 5 data compression.
2 Enables both V.42 bis and MNP 5 data compression.
3 Enables both V.42 bis and MNP 5 data compression. (Default.)

Result Codes:

OK <value> = 0, 1, 2, or 3.
ERROR Otherwise.

+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]

Defined Values

<direction> Specifies the desired direction(s) of operation of the data compression function; from the DTE point of view. 

0 = Negotiated; no compression (V.42bis P0=0). 
3 = both directions, accept any direction (V.42bis P0=11). (Default.)

<compr_neg> Specifies whether or not the modem should continue to operate if the desired result is not obtained. 

0 = Do not disconnect if V.42bis is not negotiated by the remote modem as specified in <direction>.

<max_dict> Specifies the maximum number of dictionary entries (2048 entries) which should be negotiated (may be used by the DTE to limit the codeword size transmitted, based on its knowledge of the nature of the data to be transmitted). 

<max_string> Specifies the maximum string length (32 bytes) to be negotiated (V.42bis P2).

Reporting Current or Selected Values
Command: +DS? 
Response: +DS: <direction>,<compr_neg>,<max_dict>,<max_string> 
Example: +DS: 3,0,2048,32 for the defaults and 2048 entry max dictionary. 
Reporting Supported Range of Parameter Values
Command: +DS=? 
Response: +DS: (<direction> range),(< compr_neg > range),(<max_dict> range),(<max_string> range) 
Example: +DS: (0,3),(0),(2048),(32)

+DR=[<value>] 

Defined Values

<value> decimal number corresponding to the selected option: 

0 = Data compression reporting disabled (no +DR result code transmitted). 
1 = Data compression reporting enabled (+DR result code transmitted). (Default.)

Reporting Current or Selected Values
Command: +DR? 
<current value> 
Example: +DR: 1 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +DR=? 
Response: +DR: (<value> range) 
Example: +DR: (0,1) 
+DR: <type> Intermediate Result Code
The +DR: <type> reported represents the current (negotiated or renegotiated) modem-modem data compression type. If enabled, the intermediate result code is transmitted at the point after error control negotiation (handshaking) at which the modem has determined which data compression technique will be used (if any) and the direction of operation. The +DR intermediate result co, if enabled, is issued after the Error Control Report (+ER) and before the final result code (e.g., CONNECT). 
The format of this result code is: 
Result Code Syntax

+DR: <type>

Defined Values

<type> An alphanumeric code corresponding to the selected option: 

 

NONE	Data compression is not in use.
V42B	V.42bis is in use in both directions.
ALT	MNP 5 compression.

Example

+DR: V42B

Command

Function

• 1. The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.
• 2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG tag.

Example of Formatted Form Reporting

• 1. The following example illustrates the standard Caller ID message packet.
• 
  RING 
  DATE = 0321 
  TIME = 1405 
  NMBR = 5045551234 
  NAME = A N OTHER 
  RING 
  RING

 

• 2. The following example illustrates the case where the tag of the packet is not recognized by the modem.
• 
  RING 
  MESG = 060342424231 
  RING 
  RING

Unformatted Form Reporting
The modem presents all information and packet control information found in the message. The modem, however, excludes 
the leading U's (channel seizure information) from the presentation. The packet is presented in ASCII printable hex numbers, 
the modem does not insert spaces, or line feeds, for formatting between bytes or words of the packet. 
The modem does not detect the checksum of the packet. 
Example of Unformatted Form Reporting

RING 
0412303332323234303539313435353132333435 
RING 
RING

+VDID=<digits> <timeout>

Defined Values

 

<digits>	The maximum number of digits (DTMF, MF, etc.) to expect after notification of an incoming call by the Telco. Decimal 0 is the only valid number.
<timeout>	The time interval to wait after the last modem presented DID digit to wait before assuming that there is no more DID information to follow, and ending the DID digit report. Decimal 0 is the only valid number.

Reporting Current or Selected Values
Command: +VDID? 
Response: +VDID: <digits> <timeout> 
Example: +VDID: 0,0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VDID=? 
Response: +VDID: (<digits> range),(<timeout> range) 
Example: +VDID: (0),(0)

+VNH=<hook>

Defined Values

 

<hook>	Decimal number corresponding to the selected option.
0	The modem enables automatic hangups as is normal in other modes.
1	The modem disables automatic hangups usually found in the other non-Voice Modes.
2	The modem disables automatic hangups in the other non-Voice Modes. The modem performs only a “logical” hangup (returns to OK result code).

Reporting Current or Selected Values
Command: +VNH? 
Response: +VNH: <hook> 
Example: +VNH: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VNH=? 
Response: +VNH: (<hook> range) 
Example: +VNH: (0-2) 
Result Codes

OK <hook> = 0-2. 
ERROR Otherwise.

+VIP<n>

Defined Values

<n> Decimal number 0 corresponding to the selected option.

Reporting Current or Selected Values
Command: +VIP? 
Response: +VIP: <n> 
Example: +VIP: 0     For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VIP=? 
Response: +VIP: (<n> range) 
Example: +VIP: (0) 
Result Codes

OK <n> = 0. 
ERROR Otherwise.

+VRX<n>

Defined Values

 

<n>	Decimal number corresponding to the selected option.
0	Start receive voice without periodic tone production during a voice receive operation.
1	Start receive voice with periodic tone production during a voice receive operation.

Reporting Current or Selected Values
Command: +VRX? 
Response: +VRX: <n> 
Example: +VRX: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VRX=? 
Response: +VRX: (<n> range) 
Example: +VRX: (0,1) 
Result Codes

OK <n> = 0 or 1. 
ERROR Otherwise.

+VTS=<string>

Defined Values

<string> To be added

Reporting Current or Selected Values
Command: +VTS? 
Response: +VTS: <freq1>, <freq2>, <dur> 
Example: +VTS: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VTS=? 
Response: +VTS: (<freq1> range), (<freq2> range), (<dur> range) 
Example: +VTS: (???) 
Result Codes

OK <string> = 0 or 1. 
ERROR Otherwise.

+VTX

Result Codes

CONNECT The modem accepts the command. 
ERROR       The modem is not connected to at least one off-hook telephone line or one non-telephone line.

+VGR=<gain>

Defined Values

<gain> Decimal number between 0 and 255 corresponding to the gain.

Reporting Current or Selected Values
Command: +VGR? 
Response: +VGR: <gain> 
Example: +VGR: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VGR=? 
Response: +VGR: <gain> range 
Example: +VGR: 0-255 
Result Codes

OK <gain> = 0-255. 
ERROR Otherwise.

+VGT=<level>

Defined Values

<level> Decimal number (0 and 255) corresponding to the volume level.

Reporting Current or Selected Values
Command: +VGT? 
Response: +VGT: <level> 
Example: +VGT: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VGT=? 
Response: +VGT: <level> range 
Example: +VGT: 0-255 
Result Codes

OK <level> = 0-255. 
ERROR Otherwise.

+VIT=<timer>

Defined Values

 

<timer>

Decimal number(0 and 255) corresponding to the time in units of 1.0 second. A value of 0 disables the timer.

Reporting Current or Selected Values
Command: +VIT? 
Response: +VIT: <timer> 
Example: +VIT: 0 For the default setting.
Reporting Supported Range of Parameter Values
Command: +VIT=? 
Response: +VIT: <timer> range 
Example: +VIT: 0-255 
Result Codes

OK <timer> = 0-255. 
ERROR Otherwise.

+VLS=<label>

Defined Values

 

<label>	Decimal number corresponding to the selected option.
0	Modem on hook. Phone connected to line
1	Modem connected to line.
2	Modem connected to handset
3	Modem connected to line and handset
4	Modem connected to speaker
5	Modem connected to line and speaker
6	Modem connected to microphone
7	Speaker and microphone routed to line via modem
8	Modem connected to speaker
9	Modem connected to line and speaker
10	Speaker and microphone routed to line via Modem
11	Modem connected to microphone
12	Speaker and microphone routed to line via Modem
13	Speaker and microphone routed to line via Modem
14	Modem connected to Headset
15	Speaker and microphone routed to line via Modem
16	Enable (Mute) microphone
17	Disable microphone
18	Enable (mute) speaker
19	Disable speaker

Notes:
1. Internal and External Microphone are treated the same by the Modem device set.
2. Internal and External Speaker are treated the same by the Modem device set.

Reporting Current or Selected Values
Command: +VLS? 
Response: +VLS: <label> 
Example: +VLS: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VLS=? 
Response: +VLS: <label> range 
Example: +VLS: 0-15 
Result Codes

OK <label> = 0-15. 
ERROR Otherwise.

+VRA=<interval>

Defined Values
 

Reporting Current or Selected Values
Command: +VRA? 
Response: +VRA: <interval> 
Example: +VRA: 50 (0.5 seconds) For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VRA=? 
Response: +VRA: (<interval> range) 
Example: +VRA: (0-600) 
Result Codes

OK <interval> = 0 -600 
ERROR Otherwise.

+VRN=<interval>

Defined Values

 

<interval>

Decimal number (0-60) specifying the time period, in units of 1.0 second, that the modem will wait for Ringback during call origination. A value of 0 forces the modem to report the OK result code immediately after dialing. The range is 1 to 60 seconds for <interval> = 1 to 60.

Reporting Current or Selected Values
Command: +VRN? 
Response: +VRN: <interval> 
Example: +VRN: 10 (10 seconds) For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VRN=? 
Response: +VRN: (<interval> range) 
Example: +VRN: (0-60) 
Result Codes

OK <interval> = 0 -60 
ERROR Otherwise.

+VSD=<sds>,<sdi>

Defined Values

<sds> Decimal number corresponding to the selected parameter. 

 

0	Use +VSM silence compression setting and algorithm for long-term silence detection (if +VSM is in use) or proprietary silence compression setting and algorithm for long-term silence detection (if +VSM is not in use).
127	Sets less aggressive long-term silence detection independent of presence or use of silence compression.
128	Sets nominal long-term silence detection independent of presence or use of silence compression.
129	Sets more aggressive long-term silence detection independent of presence or use of silence compression.

<sdi>

Decimal number specifying the required period of silence, in units of 0.1 second, before the modem can report silence detected at the end of a voice receive either with the “Presumed End of Message” (QUIT) or “Presumed Hangup (SILENCE) event reports. A value of 0 disables the modem silence detection. The range is 0.1 to 25.5 seconds for <sdi> = 1 to 255.

Reporting Current or Selected Values
Command: +VSD? 
Response: +VSD: <sds>,<sdi> 
Example: +VSD: 128, 50 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VSD=? 
Response: +VSD: (<sds> range),(<sdi> range) 
Example: +VSD: (0,127,128,129),(0-255) 
Result Codes

OK <hook> = 0 or 1. 
ERROR Otherwise.

+VSM=<cml>,<vsr>,<sds>,<sel>

Defined Values

 

<cml>	Decimal number identifying the compression method.
<vsr>	<range of values> containing the supported range of voice samples per second of the analog signal.
<scs>	<range of values> containing the supported range of sensitivity settings for voice receives.
<sel>	<range of values> containing the supported range of expansion values for voice transmits.

Reporting Current or Selected Values
Command: +VSM? 
Response: +VSM: <cml>,<vsr>,<sds>, <sel> 
Example: +VSM: 130,UNSIGNED PCM,8,0,(7200,11025),(127-129),(0)" 
Reporting Supported Range of Parameter Values
Command: +VSM=? 
Response: +VSM: <cml>, <cmid>, <bps>, <tm>,<vsr>,<sds>, <sel> 

 

<cml>	Decimal number identifying the compression method.
<cmid>	Alphanumeric string describing the compression method.
<bps>	Decimal number defining the average number of bits in the compressed sample not including silence compression.
<tm>	Decimal number (0-X) reporting the time interval, in units of 0.1 second, between timing marks. A value of 0 reports that timing marks are not supported. The range is 1 to 60 seconds for <tm> = 1 to 60.
<vsr>	<range of values> containing the supported range of voice samples per second of the analog signal.
<scs>	<range of values> containing the supported range of sensitivity settings for voice receives.
<sel>	<range of values> containing the supported range of expansion values for voice transmits.

Example: +VSM: 128, ADPCM,2,0,7200,(127-129),(0)<cr><lf> 
129,ADPCM,4,0,7200,(127-129),(0) <cr><lf> 
130,UNSIGNED PCM,8,0,(7200,11025),(127-129),(0) 
Result Codes

OK Valid range. 
ERROR Otherwise.

+VTD=<dur>

Defined Values

 

<dur>

Decimal number specifying the default DTMF/tone generation duration in units of 0.01 second. A value of 0 specifies a manufacturer specific time interval. The range is 0.01 to 5 seconds for <dur> = 1 to 500.

Reporting Current or Selected Values
Command: +VTD? 
Response: +VTD: <dur> 
Example: +VTD: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VTD=? 
Response: +VTD: (<dur> range) 
Example: +VTD: (0-500) 
Result Codes

OK <dur>= 0-500. 
ERROR Otherwise.

+VDR=<enable>, <report>

Defined Values

 

<enable>

Decimal number corresponding to the selected option.

 

0	The modem will not report ring cadence information.
1	The modem will report ring cadence information as specified for the <report> subparameter.

<report>

Decimal number specifying ring cadence information report when enabled by the <enable> subparameter.

 

0	The modem will produce only DROF and DRON messages. The modem will not produce any RING event codes. The modem will report other call progress event codes as normal.
Other	The modem will produce only DROF and DRON messages. The modem will produce a RING event code after <report>/10 seconds after the falling edge of the ring pulse (i.e., after the DRON report).

Reporting Current or Selected Values
Command: +VDR? 
Response: +VDR: <enable>,<report> 
Example: +VDR: 0,0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VDR=? 
Response: +VDR: (<enable> range),(<report>range) 
Example: +VDR: (0,1),(0-10) 
Result Codes

OK <enable>,<report> = (0,1),(0-10) 
ERROR Otherwise.

+VDT=<enable>,<report>

Defined Values

 

<enable>

Decimal number corresponding to the selected option.

 

0	The modem will not produce any control tone cadence report.
1	The modem will produce control tone cadence report as specified for the <report> subparameter.

<report>

Decimal number specifying the produced any control tone cadence report when enabled by the <enable> subparameter.

 

0	The modem will produce only CPOF and CPON messages.
Other	Reserved.

Reporting Current or Selected Values
Command: +VDT? 
Response: +VDT: <enable>,<report> 
Example: +VDT: 0,0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VDT=? 
Response: +VDT: (<enable> range),(<report> range) 
Example: +VDT: (0,1),(0) 
Result Codes

OK <enable>,<report> = (0,1),(0) 
ERROR Otherwise.

+VBT=<deassert>,<assert>

Defined Values

To be added

Reporting Current or Selected Values
Command: +VBT? 
Response: +VBT: <deassert>,<assert> 
Example: +VBT: TBD For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VBT=? 
Response: +VBT: (<deassert> range), (assert>range) 
Example: +VBT: (820-4096),(6144-7372), 8192 
Result Codes

OK <deassert>,<assert>= 0 or 1. 
ERROR Otherwise.

+VPR=<rate>

Defined Values

<rate>> To be added.

Reporting Current or Selected Values
Command: +VPR? 
Response: +VPR: <rate> 
Example: +VPR: 0 For the default setting. 
Reporting Supported Range of Parameter Values
Command: +VPR=? 
Response: +VPR: (<rate> range) 
Example: +VPR: (0,1) 
Result Codes

OK <rate> = 0 or 1. 
ERROR Otherwise.

+VSP=<mode>

Defined Values

<mode> Decimal number corresponding to the selected option.  </