PAD Port Configuration

PAD XON/OFF Support Using X.25 Interrupt Packets

What is It?There is a Customer Software Key (CSK) that enables the transmission of XON/ XOFF asynchronous data characters across a Public Data Network (PDN) using X.25 Interrupt packets.

This improves the transmission of flow control information between local and remote PAD ports on PathBuilder S200 series switches. Since X.25 Interrupt packets travel at a higher priority through the PDN, flow control information between PAD ports is communicated more thoroughly by letting you control the starting and stopping of the asynchronous data characters stream.

How It Works

By enabling the CSK for this feature whenever a PathBuilder S200 series switch

 

PAD port receives an XON or XOFF flow control character from a user terminal or

 

networking device, the XON/OFF enhancement sends the flow control characters

 

across the PDN as X.25 Interrupt packets for faster transmission to the remote PAD

 

port.

For example, as shown in Figure 5, when User 1 wants to stop User 2 from sending information, User 1 sends an XOFF character to the PAD port on the local PathBuilder S200 series switch. Then the local PathBuilder S200 series switch sends an X.25 Interrupt Packet to the remote node on the other side of the network, where the XOFF character is passed on to User 2. This stops User 2 from sending anymore data.

To let User 2 send information again, User 1 sends an XON character into the PAD port on the local PathBuilder S200 series switch, which sends an X.25 Interrupt Packet to the other node, and the XON character is passed on to User 2. This allows User 2 to begin sending data again.

X.25 ports

PAD Port

PAD Port

PB S200

X.25 VC

PB S200

PDN

User 1

 

User 2

Figure 5. Example of Transmitting XON/OFF Frames Across PDN with X.25 Interrupt Packets

Note

The user devices shown in Figure 5 can be networking devices or asynchronous user terminals. Remember that the CSK for this feature must be enabled in order to transmit flow control characters as X.25 Interrupt packets. If the CSK is not enabled, the feature is not supported.

Also, for this feature to work, user devices at both ends of the network must be connected to PathBuilder S200 series switches.

Set the PAD Profile record parameters Device Flow Control and PAD Data

Restraint to 1 for both PAD ports. Enabling the PAD Enhancement CSK.

Configuring PAD/ATPAD Ports

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3Com S200 manual PAD XON/OFF Support Using X.25 Interrupt Packets, How It Works
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S200 specifications

The 3Com S200 is a cutting-edge networking solution designed to meet the demands of small to medium-sized businesses. Renowned for its reliability and performance, this switch offers seamless integration and enhances network efficiency through advanced features and technologies.

One of the standout features of the 3Com S200 is its versatility. With a variety of ports ranging from 8 to 48, the switch provides ample connectivity options for various devices. This flexibility makes it an ideal choice for businesses aiming to expand their network without the need for extensive infrastructure changes. Built-in support for Power over Ethernet (PoE) enables users to connect and power devices such as IP phones and cameras, simplifying wiring and installation.

Performance is another key characteristic of the 3Com S200. Equipped with Layer 2 switching capabilities, the S200 allows for intelligent traffic management and efficient data handling. It supports advanced features like VLAN tagging, which facilitates network segmentation, improving security and performance. Additionally, the switch boasts a user-friendly interface that enables streamlined management, making network monitoring and configuration easily accessible even for non-technical staff.

The durability and reliability of the 3Com S200 are further enhanced by its robust design. Built to handle the rigors of a business environment, the switch features a fanless design for quiet operation, making it suitable for office use where noise may be an issue. With energy-efficient technology, the S200 not only minimizes power consumption but also contributes to cost savings over time.

Security is a priority for modern networks, and the 3Com S200 excels in this area. It offers features such as port security and access control lists to protect sensitive data and manage user access. Moreover, support for SNMP (Simple Network Management Protocol) facilitates proactive network management and monitoring, allowing businesses to address potential issues before they escalate.

In conclusion, the 3Com S200 stands out as a reliable, efficient, and secure networking solution. With its versatile port options, Layer 2 capabilities, user-friendly management interface, and robust security features, it is an excellent choice for businesses looking to enhance their network infrastructure. Whether scaling operations or optimizing current performance, the 3Com S200 provides the technology and reliability needed to thrive in today’s digital landscape.
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