Digi TransPort WR11 - Configure X.25 LAPB Parameters

Configuring legacy protocols Configure X.25 parameters
Digi TransPort® Routers User Guide
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Configure X.25 LAPB parameters
Link Access Procedure Balanced (LAPB) is a standard subset of the High-Level Data Link Control
(HDLC) protocol. It is a bit-oriented, synchronous, link-layer protocol that provides data framing, flow
control and error detection and correction. LAPB is the link layer that X.25 applications use. On Digi
TransPort routers, you can use LAPB over ISDN or over a synchronous serial port.
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1. Go to Configuration > Network > Legacy Protocol > X.25 > LAPB.
2. Configure LAPB parameters:
Use: Serial port Port x (in Synchronous Mode)
To use the LAPB instance over a synchronous serial port enable this setting and select a serial
port number. To configure settings of the synchronous port such as speed and clock source
navigate to Configuration > Network > Interfaces > Serial > Serial Port n > Sync Port n.
Use: ISDN
Enable this setting to use LAPB over ISDN.