# SDLC Address Table

To access the SDLC Address Table dialog:

1. Select a serial port from 4 A/S Serial card. A yellow border appears around the port.

2. Double-click or right-click and choose Configure from the pop up menu.

3. Select SDLC Address Table from the Category pull down menu.

Address (sdlcLSAddress)

LS State (sdlcLSOperState)

Comms Mode (sdlcLSOperDATMODE)

Modulus (sdlcLSOperMODULO)

Max PDU Send Size (sdlcLSOperMAXDATASend)

Max UnAck I-Frames In (sdlcLSOperMAXIN)

Max UnAck I-Frames Out (sdlcLSOperMAXOUT)

Num Re-Xmit In Retry Seq (sdlcLSOperRETRIESm)

Num Retry Sequence (sdlcLSOperRETRIESn)

Retry Sequence Pause (sdlcLSOperRETRIESt)

Last Fail Time (sdlcLSOperLastFailTime)

Last Failed Cause (sdlcLSOperLast FailCause)

## LS State (sdlcLSOperState)

Indicates the operational state of the SDLC link station. This value should be consistent with the value of sdlcLSAdminState.

## Comms Mode (sdlcLSOperDATMODE)

Indicates whether the current communications mode with the adjacent link station is two-way-alternate (half) or two-way-simultaneous (full).

## Modulus (sdlcLSOperMODULO)

Displays the current modulus for an SDLC link station. The modulus determines the size of the rotating acknowledgement window used by the SDLC link station pair. Possible values are 8 or 128.

## Max PDU Send Size (sdlcLSOperMAXDATASend)

Displays the maximum PDU (Protocol Data Unit) size that the local link station can send to the adjacent link station. This value is received in the XID from the adjacent link station. If no XID is received, this value is dependent on the implementation.

This value includes the Transmission Header (TH) and the Request Header.

## Max UnAck I-Frames In (sdlcLSOperMAXIN)

Indicates the current maximum number of unacknowledged I-frames that an SDLC link station can receive. In an SDLC connection, data is transferred in a numbered information unit called an I-frame.

This shall range from 1 to sdlcLSOperModulo-1.

## Max UnAck I-Frames Out (sdlcLSOperMAXOUT)

Displays the maximum number of consecutive unacknowledged I-frames which an SDLC link station can send without an acknowledgement.

This shall range from 1 to sdlcLSOperModulo-1.

## Num Re-Xmit In Retry Seq (sdlcLSOperRETRIESm)

Controls the number of retries in a retry sequence for an SDLC link station. A retry sequence is a series of retransmitted frames (data or control) for which no positive acknowledgement is received.

## Num Retry Sequence (sdlcLSOperRETRIESn)

Displays the number of times that the retry sequence is repeated for an SDLC link station. A retry sequence is a series of retransmitted frames (data or control) for which no positive acknowledgement is received.

## Retry Sequence Pause (sdlcLSOperRETRIESt)

Displays the interval in hundreths of seconds between retry sequences for an SDLC link station if multiple retry sequences are specified. A retry sequence is a series of retransmitted frames (data or control).

A retry is a series of retransmitted frames (data or control) for which no positive acknowledgement is received.

## Last Fail Time (sdlcLSOperLastFailTime)

Displays the value of the sysUpTime parameter when this SDLC link station last failed. The value is zero if the link station has not failed.

## Last Failed Cause (sdlcLSOperLast FailCause)

Indicates the cause of the last failure of this SDLC link station. Possible values are undefined, rxFRMR, txFRMR, noResponse, protocolErr, noActivity, rnrLimit, and retriesExpired.

The undefined value indicates that the link station has not failed.