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Configuring the Serial Interface
Introduction This section describes the serial interface and explains how to configure your
Vanguard 342 for various communication interface types. These topics are
discussed:
• Setting the Interface Type
• Setting the Interface Options
The Serial Interface The Vanguard 342 supports a software-programmable serial interface that is integral
to the motherboard. Port 3 supports the serial interface and can be configured to
function as a fixed Data Interface Module, providing communication using these
interface types:
•V.24
•V.35
•V.36
•X.21/V.11
Note
The serial interface supports only DCE mode but can accommodate DTE with
the use of a crossover adapter cable. For information on DTE capability, refer to
the “Setting the Interface Options” section on page 3-10.
The Serial Interface
Parameters
The serial interface is supported in the Port Configuration menu and can be
configured using the Control Terminal Port (CTP). Included in the Port
Configuration menu, are two parameters that allow you to set both the
communication and electrical interfaces. These parameters are:
Interface Type
This parameter allows you to set the communication interface type (physical layer
protocol) on Port 3. The interface types include: V.24, V.35, V.36, and X.21/V.11.
Interface Option
This parameter allows you to specify the traditional hardware strap used in V.24
Vanguard Daughtercards and electrical interface for V.35, V.36, and X.21/V.11
cabling operations.