User`s guide

Note:

Note that if multiple PAD or IP instances are sharing this LAPD instance, the maximum

transmission rates of all instances will be limited.

Rx Throughput

The Rx Throughput parameter is used in conjunction with the Tx Throughput parameter to

limit the maximum data throughput on a LAPD link in bits per second.

If this parameter is set to 0, the unit will transmit data across the LADP link as fast as

possible whilst observing hardware or software flow control if enabled.

When set to a value greater than 0, the unit will limit the rate at which data can be received

over the LAPD link when it detects that receive throughput exceeds the specified rate

Note:

Note that if multiple PAD or IP instances are sharing this LAPD instance, the maximum

transmission rates of all instances will be limited.

Reactivate D-channel connection

When this parameter is enabled, the unit will try to reactivate a D-channel connection after

disconnection by the network by transmitting SABME frames. If it is unable to reactivate the

connection after retrying the number of times specified by the N400 counter, it will wait for

1 minute before repeating the retry sequence.

Enabling this parameter also deactivates the Reactivate after n secs parameter

If this parameter is disabled, the unit will not attempt to reactivate a D-channel link

following deactivation by the network.

Reactivate after n secs

This parameter specifies the number of seconds a deactivation has to be present before

the LAPD instance will try to reactivate itself.

After X.25 PAD session is terminated

This parameter determines if to deactivate or not the LAPD session when an X.25 PAD

session is terminated

Deactivate the LAPD session

This parameter enables automatic deactivation of a LAPD session when an X.25 PAD

session is terminated.

Do not deactivate the LAPD session

This parameter ensures the unit will not deactivate the LAPD session when an X.25 PAD

session is terminated.

Enable D64S Mode

D64S mode is a mode in which ISDN B-channel(s) may be used without the need to use any

D channel protocol. It is sometimes referred to as “nailed up” ISDN. To enable this mode for

this LAPD instance, Tick the D64S mode parameter checkbox and ensure that the TEI

parameter is set to 255. This means that for any application that uses ISDN (e.g. PPP) then

it will use D64S mode.

First D64S B-channel

When using D64S mode there is no dialling protocol to negotiate which B-channel to use.

This must therefore be specified using this parameter. Check B1 radio button to select

channel B1 and Check B2 radio button to select channel B2 (if another channel is

requested from an application then it will use the other unused B channel).