Chapter 2 Planning Your Installation

Distance Limitations for Interface Cables

Table 2-2

EIA/TIA-232 Speed and Distance Limitations (continued)

 

 

 

 

 

Signal Rate

 

Distance (Feet)

Distance (Meters)

 

 

 

 

 

19200

 

25

7.6

 

 

 

 

 

 

38400

 

12

3.4

 

 

 

 

 

 

56000

 

8.6

2.6

 

 

 

 

 

 

Caution EIA/TIA-232 is often used at greater distances than specified in Table 2-2 on page 2-4. If you understand the electrical problems that can arise and can compensate for them, you might still obtain good results; however, we recommend that you keep your cable runs within the standard-defined distances.

Table 2-3shows the standard relationship between signal rate and maximum distance for EIA/TIA-449, V.35, and X.21 signals.

Table 2-3

EIA/TIA-449, V.35, and X.21 Speed and Distance Limitations

 

 

 

 

 

Signal Rate

 

Distance (Feet)

Distance (Meters)

 

 

 

 

 

2400

 

4100

1250

 

 

 

 

 

 

4800

 

2050

625

 

 

 

 

 

 

9600

 

1025

312

 

 

 

 

 

 

19200

 

513

156

 

 

 

 

 

 

38400

 

256

78

 

 

 

 

 

 

56000

 

102

31

 

 

 

 

 

 

T1/E1

 

50

15

 

(1544000)

 

 

 

 

 

 

 

 

 

Caution The EIA/TIA-449 and V.35 interfaces support data rates up to 2.048 megabits per second (Mb/s). Exceeding this maximum could result in loss of data and is not recommended.

Table 2-4shows the standard relationship between signal rate and maximum distance for EIA/TIA-530 and EIA/TIA-530A signals.

 

 

Table 2-4

EIA/TIA-530/EIA/TIA-530A Speed and Distance Limitations

 

 

 

 

 

 

 

 

 

Signal Rate

 

Distance (Feet)

Distance (Meters)

 

 

 

 

 

 

 

 

 

 

 

 

Up to 90000

 

3940

1200

 

 

 

 

 

 

 

 

 

 

 

 

 

110000

 

460

140

 

 

 

 

 

 

 

 

 

 

 

 

 

120000

 

425

130

 

 

 

 

 

 

 

 

 

 

 

 

 

130000

 

395

120

 

 

 

 

 

 

 

 

 

 

 

 

 

1000000

 

330

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1/E1

 

230

70

 

 

 

 

(1544000)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco IAD2430 Series Integrated Access Devices Hardware Installation Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-4234-06

 

 

 

 

 

2-5

 

 

 

 

 

 

 

 

Page 35
Image 35
Cisco Systems IAD2430 manual EIA/TIA-449, V.35, and X.21 Speed and Distance Limitations

IAD2430 specifications

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