Wan Interface Configuration; Asynchronous Serial Interface; Overview - 3Com MSR 50 Series Configuration Manual

4
Asynchronous Serial
Interface

Overview

WAN I
In terms of line type, wide area networks (WANs) fall into these types: X.25, Frame
Relay (FR), ATM, and ISDN. To interface to these networks, routers are designed
with asynchronous serial interface, synchronous serial interface, ATM interface,
ISDN BRI interface, CE1/PRI interface, and so on.
When configuring WAN interfaces, go to the following sections for information
that you are interested in:
"Asynchronous Serial Interface" on page 99
■
"AUX Interface" on page 101
■
"USB Interface" on page 101
■
"AM Interface" on page 103
■
"ISDN BRI Interface" on page 104
■
"CE1/PRI Interface" on page 106
■
"CT1/PRI Interface" on page 110
■
"E1-F Interface" on page 115
■
"T1-F Interface" on page 117
■
"CE3 Interface" on page 119
■
"CT3 Interface" on page 122
■
n
Refer to "ATM and DSL Interface Configuration" on page 71
ATM interface.
Following two types of asynchronous serial interfaces are available.
Synchronous/asynchronous serial interface operating in asynchronous mode,
■
whose interface index begins with Serial
Dedicated asynchronous serial interface, whose interface index begins with
■
Async
An asynchronous serial interface can operate in the flow mode or protocol mode.
It can operate as a dialup interface when having a modem or an ISDN terminal
adapter (TA) attached to it. You can encapsulate an asynchronous serial interface
with PPP on the data link layer to provide support for network layer protocols such
as IP and IPX.
NTERFACE
C
ONFIGURATION
for information about