Table 8-1 Physical X.25 Port Parameters (continued)

Parameter

Valid Values

Default Value

 

 

 

 

 

 

Generate Clock

Y/N

Y

 

 

 

Rcv Clock (TT) from DTE 2

Y/N

N

CSU/DSU Operating Mode

Normal, LDM

Nor mal

 

 

 

RTS Control

Constant, External

Constant

 

 

 

Lowest/Highest Incoming Channel

0–4095 3

see explanation

Lowest/Highest Two-Way Channel

0–4095 3

see explanation

Lowest/Highest Outgoing Channel

0–4095 3

see explanation

Flow Control Negotiation

Y/N

N

 

 

 

Throughput Class Negotiation

Y/N

N

 

 

 

Local Charging Prevention

Y/N

N

 

 

 

Reverse Charge Acceptance

Y/N

N

 

 

 

Fast Select Acceptance

Y/N 4

N

Incoming Calls Bar red

Y/N

N

 

 

 

Outgoing Calls Bar red

Y/N

N

 

 

 

Mask Link Alar ms

Y/N

N

 

 

 

Maximum Packet Size

128–4096

1024

 

 

 

Default Packet Size

16–4096

128

 

 

 

Maximum Window Size

1–7

7

 

 

 

Default Window Size

1–7

2

 

 

 

Maximum Throughput Class

see explanation

none

 

 

 

Default Calling Address

0–15 characters

none

 

 

 

T20 Restart Timer (sec)

1–600

60

 

 

 

T21 Incoming Call Timer (sec)

1–600

180

 

 

 

T22 Reset Timer (sec)

1–600

60

 

 

 

T23 Clear Tim er (sec)

1–600

60

 

 

 

DTE Restart Retry Count

0–99

0

 

 

 

DTE Reset Retry Count

0–99

0

 

 

 

DTE Clear Retr y Count

0–99

0

 

 

 

CUG Parameters

 

 

 

 

 

Pr eferential CUG Flag

Y/N

N

 

 

 

Pr eferential CUG

0–99

0

 

 

 

Incoming Access Allowed

Y/N

N

 

 

 

Outgoing Access Allowed

Y/N

N

 

 

 

Dial Port Parameters

 

 

 

 

 

Dial Support

None, Dialout, Dialin

None

 

 

 

Inactivity Timer (minutes)

1–30

5

 

 

 

Disconnect Timer (seconds)

1–255

5

 

 

 

Line Setup Timer (seconds)

1–255

5

 

 

 

11–7if Modulo 8, 1–127if Modulo 128.

2This parameter is relevant only if Physical Port Interface is something other than RS- 232 and Generate Clock is Y.

30 means the parameter is not used.

8-6

SmartSwitch 1800 4. 0 User Guide, Rev 01

Page 97 Page 99
Page 98
Image 98
Cabletron Systems 1800 manual CUG Parameters
Page 97 Page 99

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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