Avaya Configuring WAN Lines Services Instrukcja Użytkownika Strona 82

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Configuring WAN Line Services
2-34
308648-14.00 Rev 00
Setting the Pasync Baud Rate
The Pasync Baud Rate parameter sets the transmission speed for polled AOT
packets between primary and secondary routers over a TCP connection. The
parameter options are 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, and
57600. The default setting is 600.
Using Site Manager
See the Pasync Baud Rate parameter on page A-88 for information.
Editing LAPB Protocol Services
The Link Access Procedure Balanced (LAPB) protocol is a version of the
high-level data link control (HDLC) protocol, which is an OSI data link layer
standard. This section describes the following:
LAPB Implementation on Nortel Networks Routers
LAPB Parameters
LAPB Implementation on Nortel Networks Routers
The implementation of the LAPB protocol differs among Nortel Networks
routers. On the AN, ANH, ARN, ASN, and System 5000 routers, and on the BN
®
and LN
®
routers with the Octal Sync link module, LAPB is implemented in the
software. For all other link modules, LAPB is implemented in the hardware, and
you cannot configure LAPB line parameters.
Nortel Networks routers use LAPB services to initialize the link between the
router and the local DCE, and to frame X.25 data packets before transmitting them
to the DCE. X.25 uses the LAPB protocol at the data link layer to:
Initialize the link between the DTE and the local DCE
Frame X.25 data packets before transmitting them to the DCE
The LAPB information field contains the X.25 packets.When 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, see Configuring X.25 Services.
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