2-5
Cisco IAD2430 Series Integrated Access Devices Hardware Installation Guide
OL-4234-06
Chapter 2 Planning Your Installation
Distance Limitations for Interface Cables
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 2-3
shows the standard relationship between signal rate and maximum distance for EIA/TIA-449,
V.35, and X.21 signals.
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 2-4
shows the standard relationship between signal rate and maximum distance for EIA/TIA-530
and EIA/TIA-530A signals.
19200
25
7.6
38400
12
3.4
56000
8.6
2.6
Table 2-2
EIA/TIA-232 Speed and Distance Limitations (continued)
Signal Rate
Distance (Feet)
Distance (Meters)
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
(1544000)
50
15
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
(1544000)
230
70
