Explanations of Port Parameters

Maximum Retransmissions

Table 10-2 BSC Interactive Port Subscriber Parameters

Parameter	Valid Values	Default Value


Sq (Sequence)	1–16	none

Local Sub	0–15 characters	none

Remote Sub	0–15 characters	none

Atcl (Autocall)	Y/N (used only on TPAD) 1	N
Rtytm (Retry Timer) (sec)	15–255	60

Rty # (Retry Number)	0–255	0 (indefinite)

Conn ID	00–ff	none

1If the TPAD is connecting to a logical X. 25 port in the SmartSwitch, Atcl must be Y.

Port Type

specifies the protocol the port will support. Selecting this parameter will display a list of all serial protocols loaded in the device.

Physical Port Interface

must be configured as follows. For reference, port locations are shown on page 6-1.

●Port 0 is always RS-232.

●Port 1 must be RS-232if the port is being configured for BSC.

●Ports 2 and 3 are determined by the attached cables: RS-232 ,V.35, or RS-449.

Blocked Port Flag

will cause the port to be enabled (N) or disabled (Y) at node IPL. The port will remain in that state until this parameter is changed or an on-line enable ([B], [B], [C] from the Main Menu) or disable ([B], [B], [A] from the Main Menu) is performed.

Line Speed

is the data transmission rate in bits per second, and the clock speed on a serial port when the port is a physical DCE (i.e., the attached I/O cable is DCE). If this port is a physical DTE, specify the line speed that matches (as closely as possible) that of the device connected directly to the port.

Retransmission Period

is the length of time before the node will transmit an I-frame if the previous trans- mission is not acknowledged. If the period expires, the timer will be reset and a super- visory frame will be transmitted demanding immediate acknowledgement. The

(see that entry) counter will also be incremented.

The default value of 2000 ms allows avoidance of unnecessary retransmission of frames that have merely been delayed.

Configuring BSC Interactive

10-5

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.

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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.

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Cabletron Systems 1800 manual Explanations of Port Parameters

Models: 1800

Table 10-2 BSC Interactive Port Subscriber Parameters