Incoming Calls Barred

is an X.25 facility that prevents transmission of incoming calls to this port.

Outgoing Calls Barred

is an X.25 facility that prevents transmission of outgoing calls from this port.

Mask Link Alarms

prevents (if enabled) transmission to the collecting node of the link alarms 400-406 (Link Enabled, Link Disabled, etc.)

Maximum Packet Size

is the maximum data packet size that will be allowed to pass through this port. A packet size included in a call setup packet will be used, as long as it is smaller than the maximum specified here.

Default Packet Size

will be assigned to an incoming call setup packet if the packet does not request a packet size.

Maximum Window Size

is the maximum number of unacknowledged packets per logical channel that can pass through the port .

Default Window Size

will be assigned to an incoming call setup packet if the packet does not request a window size.

Maximum Throughput Class

specifies the default throughput class that will be inserted into a Call Request packet if Throughput Class Negotiation is not enabled or if a throughput class is not requested in the Call Request. This value should not be higher than the line speed specified for the physical port. Valid values (in bits per second) are:

75

150

300

600

1200

2400

4800

9600

19.2K

48K

64K

 

Default Calling Address

will be inserted into to an incoming Call Request packet if the packet does not contain a calling address.

T20 Restart Timer

will be started when the port issues a Restart Request, and stopped (and reset) when a Restart Confirmation or Restart Indication is received. If the timer expires, the port will retransmit the Restart Request.

T21 Incoming Call Timer

will be started when the port issues a Call Request packet, and stopped (and reset) when a Call Connected, Clear Indication, or Incoming Call is received. If the timer expires, the port will send a Clear Request.

T22 Reset Timer

will be started when the port issues a Reset Request, and stopped (and reset) when a Reset Confirmation or Reset Indication is received. If the timer expires, the port will retransmit the Reset Request.

8-10

SmartSwitch 1800 4. 0 User Guide, Rev 01

Page 101 Page 103
Page 102
Image 102
Cabletron Systems 1800 manual Incoming Calls Barred
Page 101 Page 103

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.
Top Page Image Contents