Router 1-Port Serial Sic; Introduction - 3Com 3C13886 - Router OC-3 ATM SML Flexible Interface Card Installation Manual

3Com Router Module Guide

2.2 ROUTER 1-PORT SERIAL SIC

2.2.1 Introduction

1-port multiprotocol synchronous/asynchronous serial interface card (ROUTER
1-PORT SERIAL SIC) supports both synchronous and asynchronous operating modes.
It supports:
Transmission/Receiving and handling of synchronous and asynchronous serial
data streams;
Different operating modes, such as V.24/V.35 and DTE/DCE, depending on the
actual applications;
Automatic external cable type detection without the need of manual configuration;
Local loopback and remote loopback, facilitating fault test and location.
I. Synchronous and asynchronous
In different operating modes, a synchronous/asynchronous serial interface supports
different signal standards and baud rates and the maximum transmission distance of
the signals is related to the baud rate setting. For the relationships between cable type,
baud rate setting and signal transmission distance, see the following table.
Table 2-3 Baud rate and transmission distance of V.24 (RS232)/V.35 cable
Baud rate (bps)
2400
4800
9600
19200
38400
64000
115200
-
V.24 (RS232)
Maximum
transmission
Distance (m)
60
60
30
30
20
20
10
-
2-3
Chapter 2 Smart Interface Cards
V.35
Baud rate (bps)
2400 1250
4800 625
9600 312
19200 156
38400 78
56000 60
64000 50
2048000 30
Maximum
transmission
Distance (m)