Synchronous Serial Interface; Overview; Configuring A Synchronous Serial Interface - 3Com MSR 50 Series Configuration Manual

102 C 4: WAN I
HAPTER
Synchronous Serial
Interface

Overview

Configuring a
Synchronous Serial
Interface
C
NTERFACE ONFIGURATION
n
In certain cases, configurations concerning PPP, DCC, IP address, firewall, and
backup center are required for a USB interface. Refer to
page 367, "DCC Configuration" on page
page 623, "Firewall Configuration" on page
Configuration" on page 1961
A synchronous serial interface has the following features:
Work in either DTE or DCE mode. Usually, it serves as DTE to accept the clock
■
provided by DCE.
Be connected to various types of cables, such as V.24, V.35, X.21, RS449, and
■
RS530. Your device can automatically detect the type of connected cable and
select electrical properties. In most cases, you do not need to manually
configuration them.
Support link layer protocols such as PPP, FR, link access procedure, balanced
■
(LAPB), and X.25.
Support network layer protocols IP and IPX.
■
Provide information about the connected cable type, operating mode (DTE or
■
DCE) and so on with the display interface serial command.
Follow these steps to configure a synchronous serial interface:
To do...
Enter system view
Enter synchronous serial
interface view
Set the interface operating
mode to synchronous mode
Set the link layer protocol
Set the digital signal coding
format
Set the baud rate
153, "IP Addressing Configuration" on
1789, and
for related information.
Use the command...
system-view
interface serial
interface-number
physical-mode sync
link-protocol { fr | hdlc |
lapb | ppp | sdlc | x25 }
code nrzi
baudrate baudrate
virtualbaudrate
virtualbaudrate
"Configuring PPP" on
"Backup Center
Remarks
--
Required
Optional
The default is synchronous
mode.
Optional
The default is PPP.
Optional
The default is
non-return-to-zero (NRZ).
Optional
The default is 64,000 bps.
These commands are available
to synchronous/asynchronous
serial interface operating in
asynchronous mode only.