Agilent Technologies J3972A, J3919A manual Init String

Installation

Connecting the Probe

Verify that the Modem Init String is properly initialized for the attached modem by referencing the modem’s documentation. The probe’s default modem initialization string is configured to work with low-speed and medium-speed Hayes compatible modems. The following modem settings are recommended for low-speed to medium-speed modem connections:

	Modem Flow Control:	Off
	Data Compression (if applicable):	Off
	Error Correction (if applicable):	Off
	Not all Hayes commands are the same for all Hayes-compatible modems. Refer
	to your modem’s documentation to determine the commands required for each of
	the above settings and append these commands to the end of the default Modem
	Init String.
NOTE	Your modem’s documentation discusses the features that are relevant to your
	modem. If your modem does not support a feature (data compression, for
	example), you do not need to turn it off in the Modem Init String.

Some modems require you to set register values explicitly, rather than sending Hayes style commands. In this case, follow your modem’s documentation to set these registers.

If you are using a high-speed modem, you probably need to modify the default modem initialization string. The following modem settings are recommended for high-speed modem connections:

Modem Flow Control:	Hardware Flow Control (RTS/CTS signaling)
Carrier Detect:	Always On
Data Compression:	Enabled
Error Correction:	Enabled

After appending the appropriate commands to the modem initialization string, warm start your probe.

Refer to your NetMetrix documentation for information on how to establish communications with the probe over the SLIP link.

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