Data Carrier Detect DCD Control | Actiontec electronic IS560LH

Result Codes:

	OK	n = 1

	ERROR	Otherwise

&Cn		Data Carrier Detect (DCD) Control

Data Carrier Detect is a signal from the modem to your computer indicating that the carrier signal is being received from a remote modem. DCD normally turns off when the modem no longer detects the carrier signal.

	Command		Effect

	&C0		The state of the carrier from the remote modem is
	&C0		ignored. DCD circuit is always on.
			ignored. DCD circuit is always on.

			DCD turns on when the remote modem’s carrier signal
	&C1		is detected, and off when the carrier signal is not
			detected (default).

Result Codes:

	OK	n = 0, 1

	ERROR	Otherwise

&Dn		DTR Control

This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal.

Command	Effect

	Ignore. The modem ignores the true status of DTR and
&D0	treats it as always on. This should only be used if your
	computer does not provide DTR to the modem.

	If the DTR signal is not detected while in on-line data
&D1	mode, the modem enters command mode, issues OK
	result code, and remains connected.

	If the DTR signal is not detected while in on-line data
&D2	mode, the modem disconnects (default). If this signal is
	not present, the modem will not answer or dial.

	Monitor DTR signal when an on-to-off transition occurs,
&D3	the modem performs a soft reset as if the ATZ
	command was received.

Result Codes:

	OK	n = 0, 1, 2,
	OK	3
		3

	ERROR	Otherwise

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Actiontec electronic IS560LH user manual Data Carrier Detect DCD Control, DTR Control

Contents

Internal Voice/Fax Windows Modem Table of Contents Introduction Do This First For Windows 95 and Windows 98 Installations Windows 95 IRQ Resources Dialog Box COM2 Properties Dialog Box For Windows NT 4.0 Installation Proceed to the section titled Installing the Modem Devices Window Hardware Installation Installing The Modem Installing The Modem Connecting Devices Connecting Devices To The Modem Configuring Windows Page Page Finish Configuring Windows 95 OEM SR2Page Page Page Next Page Page Page Page Page Page Configuring Windows NT Page Page Page Init String Modem’s Voice FeaturesAT&F&C1&D2W2 Page Windows 95 and Windows Troubleshooting More Info Panel Uninstalling the Modem Does Not InstallPage Page No Dialtone Error Common ProblemsPage Repeat Last Command AT CommandsAnswer Command +++ Escape sequence This command determines Ccitt vs. Bell standard Communication Standard SettingResult Codes Carrier Control DnDial Online Data Character Echo Command Echo CommandHook Control This command sets speaker volume to low, medium, or high Monitor Speaker VolumeRequest ID Information Modulation Handshake This command turns the speaker on or off Select Pulse Dialing Return On-line to Data ModeResult Code Control Select Tone Dialing Result Code Option VnDCE Response Format Dial Tone Detect Extended Result Codes Long Space Disconnect Busy Tone DetectRecall Stored Profile Auto Retrain DTR Control Data Carrier Detect DCD Control Auxiliary Relay option 22bis Guard Tone Control This Command is effective only for use in Japan Asynchronous Communications ModeLocal Flow Control Selection Pulse Dial Make-to-Break Ratio Selection Data Set Ready DSR Option This command selects DSR action Below is an example of a possible output This command is used to display the active profiles SSE \An Zn=x\Bn Modem Port Flow Control Adjust Bits/s Rate Control\Kn Same as 4.Default \Nn \Vn Protocol Result Code \Tn Inactivity Timer Data Calling Tone \Xn XON/XOFF Pass Through V90=x V.90 Downstream Rate and Control AT Commands for Testing and Debugging Enable/Disable Data CompressionWrite to/Read from DSP Register Line-to-Line Loopback Initial Transmit Carrier Rate 33600 Tion failedAfter initial negotiation Rate Final Transmit Carrier Rate 33600Final Receive Carrier Rate 33600 Tion rate Registers Reference Range −127, Ascii decimal Default Carriage return Units Range 0−255 Default UnitsASCIIRange −127, Ascii decimal Default Line feed Units Range −32 Default Backspace Units Connection Completion Time-Out Range Default UnitssecondsComma Dial Modifier Time S11 Dtmf Dialing Speed S10 Automatic Disconnect DelayS12 Escape Guard Time S14 General Bit Mapped Options Status S21 S24 Timer to Control Sleep ModeS22 S30 Inactivity Timer S28 Modulation Enable/DisableS32 S33 S38 56K Dial Line Rate default S37 Dial Line Rate defaultS36 Connection S43 Auto Mode default 1, range S42 Auto Rate default 1, rangeS48 Lapm Error Control and Feature Negotiation default S40 S90 S89 Timer to Control Sleep ModeS91 S92 No Carrier Result Code Summary DescriptionPage FCC Part 68 Requirements FCC RegulationsDeclaration of Conformity Canadian Department Of Communications Cdoc