Avaya Configuring Line Services Uživatelský manuál Strana 123

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Customizing Synchronous and Asynchronous Lines
4-23
Editing LAPB Protocol Parameters
The Link Access Procedure Balanced (LAPB) protocol is a version of the
high-level data link control (HDLC) protocol. Bay Networks routers use the
services of LAPB to initialize the link between the router and the local DCE
device, and to frame X.25 data packets before transmitting them to the DCE.
The LAPB information field contains the X.25 packets. Once an X.25 packet
reaches the destination router, the LAPB protocol strips away the LAPB frame
and delivers the packet to the network layer for further processing. For detailed
information on X.25, refer to Configuring X.25 Services.
When you configure X.25 on a Bay Networks AN or ASN router, or on an Octal
Sync link module line, Site Manager automatically configures LAPB.
To edit LAPB protocol parameters:
1. Start at the Edit SYNC Parameters window (refer to Figure 4-1).
2. Click on LAPB.
The Edit LAPB Parameters window appears (F
igure 4-4). Use the window’s
scroll bar to view all of the LAPB line parameters.
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