Cisco Systems IAD2430 用户手册
2-4
Cisco IAD2430 Series Integrated Access Devices Hardware Installation Guide
OL-4234-06
Chapter 2 Planning Your Installation
Distance Limitations for Interface Cables
Before you connect a device to the synchronous serial port (labeled SERIAL 0), you need to know the
following:
following:
•
Type of device, DTE or DCE, you are connecting to the synchronous serial interface
•
Type of connector, male or female, required to connect at the device
•
Signaling standard required by the device
Distance Limitations for Interface Cables
When planning your installation, consider distance limitations and potential electromagnetic
interference (EMI) as defined by the Electronic Industries Association (EIA). Distance limitation
information is included for the following IAD ports:
interference (EMI) as defined by the Electronic Industries Association (EIA). Distance limitation
information is included for the following IAD ports:
•
•
•
•
•
•
Fast Ethernet Maximum Distance
The maximum segment distance for Fast Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).
T1/E1-WAN Port Maximum Distances
shows the distance limitations for T1/E1 signals (specified in ANSI T1.403).
Serial Port Maximum Distances (WIC/VIC Cards)
shows the standard relationship between signal rate and maximum distance for EIA/TIA-232
signals.
Table 2-1
T1/E1- WAN Port Distance Limitations
Signal Rate
Distance (Feet)
Distance (Meters)
T1/E1 (CSU)
6200
1890
Table 2-2
EIA/TIA-232 Speed and Distance Limitations
Signal Rate
Distance (Feet)
Distance (Meters)
2400
200
60
4800
100
30
9600
50
15