The SmartSwitch 1800 routes traffic based on the user data field if the U operator is present in the SVC routing table. The gateway also allows the U operator, and can include user data field operations.

Replacing Called/Calling Address or User Data

To replace all or part of any of these fields, press [B] or [C] at the Translation Template Maintenance Menu. When prompted, enter the desired information as described below:

L = Literal digits, which means that the actual digits you enter here will replace that same number of digits in the specified field. Type L followed (with no spaces) by the desired digits, 0–9 . For example, typing L1234 [Enter] will replace four digits in the selected part of the field with the actual numbers 1234.

X = Called address. The characters entered here are not necessarily the exact char- acters of original called address, but rather the characters (digits or wildcards) of the template ID that match the original called address (that part not already trans- lated).

Type X followed (with no spaces) by the desired characters, 1–9 , A–F , indicating which positions of the 15 digits in the original called address are to replace the selected portion of the packet. For example, typing X1234 [Enter] takes the first, second, third, and fourth characters of the (remaining) original called address part of the template ID.

The matching procedure is described in the following example. Assume:

◆The called address of the packet is 31101234567800.

◆The Template ID is 3110??*U123??.

◆The Translation Formula is L1234X567.

The translation inserts literal digits 1234, then takes the characters from the original called address that match the fifth, sixth, and seventh characters of the Template ID (??*). ?? matches the first two characters from the called address that have not already been changed (12), and * matches the entire string of remaining characters. Therefore, the translation result is 12341234567800.

G = Calling address. The characters entered here are not necessarily the exact char- acters of original calling address, but rather the characters (digits or wildcards) of the template ID that match the original calling address.

Type G followed (with no spaces) by the desired characters, 1–9 , A–F , indicating which positions of the 15 digits in the calling address are to replace the selected portion of the packet.

U = Original user data. Note that the user data field is divided into four bytes of pro- tocol identifier followed by twelve bytes of "real" user data; the only part that can be changed here is the real user data. The characters entered here are not the actual characters of user data, but the characters (digits or wildcards) of the template ID that match the original user data (that part not already translated).

Type U followed (with no spaces) by the desired characters, 1–9 , A–C , indicating which positions of the twelve digits in the original user data are to replace the selected portion of the packet.

Configuring X.25

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Cabletron Systems 1800 manual Replacing Called/Calling Address or User Data
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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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