Defining Connectivity Components

Defining Ports, DLCs, and Connection Networks

Select NRZ (typically used in the U.S.) or NRZI (typically used in Europe) for the encoding used on your SDLC line.

This value must match the encoding scheme used by the modem at the remote end of the link. If you set this field incorrectly, you will find that the frames being received are all discarded and do not appear in any trace.

On a VTAM host, this is the NRZI= setting in the LINE/GROUP definition.

For switched outgoing ports, you configure the line encoding on each link station (see “Defining Link Stations”) instead of on the port.

On some platforms, if you configure a switched incoming port, you need to configure the following:

Dial string

An ASCII string to be sent to your modem in order to prepare it to accept incoming calls.

By default, the dial string is sent to the modem at the rate of 1200 bits per second (the default baud rate) using asynchronous communications. You can match the baud rate to the modem's baud rate by placing one of the following numbers, enclosed by parentheses, in front of the dial string:

•1 (300 baud)

•2 (600 baud)

•3 (1200 baud)

•4 (2400 baud)

•5 (4800 baud)

•6 (9600 baud)

•7 (19200 baud)

For example, you can specify a 9600 baud rate dial string by entering (6), as follows:

(6)AT &&D3 &&Q1 DT7,012345678

For an explanation of the rest of the dial string, refer to your modem's documentation.

For switched outgoing ports, the dial string is configured on each link station. For leased ports, this field does not apply.

Chapter 5

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