Preparing for Installation 2-9
Site Requirements
Table 2-6
IEEE Standard EIA/TIA-232C Transmission Speed versus Distance
Balanced drivers allow EIA/TIA-449 signals to travel greater distances than EIA/TIA-232.
Table 2-7 shows the standard relationship between bit rate and distance for EIA/TIA-449 signals.
Table 2-7
IEEE Standard EIA/TIA-449 Transmission Speed versus Distance
Note
The recommended distance limits for EIA/TIA-449 shown in Table 2-7 are also valid for
V.35, X.21, and EIA-530. However, you can get good results at distances and rates far greater than
these. In common practice, EIA/TIA-449 and EIA-530 support 2-Mbps rates, and V.35 supports
4-Mbps rates without any problems.
SONET Connections for the AIP
The SONET specification for fiber-optic transmission defines two types of fiber: single mode and
multimode. Modes can be thought of as bundles of light rays entering the fiber at a particular angle.
Single-mode fiber allows only one mode of light to propagate through the fiber, while multimode
fiber allows multiple modes of light to propagate through the fiber. As multiple modes of light
propagate through the fiber, they travel different distances depending on the entry angles. This
causes them to arrive at the destination at different times (a phenomenon called modal dispersion).
As a result, single-mode fiber is capable of higher bandwidth and greater cable run distances than
Rate (bps)
Distance (Feet)
Distance
(Meters)
2400
200
60
4800
100
30
9600
50
15
19200
25
7.6
38400
12
3.7
56000
8.6
2.6
Rate (bps)
Distance (Feet)
Distance (Meters)
2400
4100
1250
4800
2050
625
9600
1025
312
19200
513
156
38400
256
78
56000
102
31
128000
76
23
256000
50
15
1544000 (T1)
50
15
2000000
40
12
4000000
25
8
Содержание TelePresence Server 7010
Страница 10: ...x Cisco 7010 Hardware Installation and Maintenence ...
Страница 14: ...iv Cisco 7010 Hardware Installation and Maintenance Document Conventions ...
Страница 112: ...2 52 Cisco 7010 Hardware Installation and Maintenance Initial Configuration Information Page ________ ...
Страница 148: ...3 36 Cisco 7010 Hardware Installation and Maintenance Using the Flash Memory Card ...
Страница 158: ...4 10 Cisco 7010 Hardware Installation and Maintenance Troubleshooting the Processor Subsystem ...
Страница 242: ...5 84 Cisco 7010 Hardware Installation and Maintenance Replacing Internal Components ...
Страница 258: ...A 16 Cisco 7010 Hardware Installation and Maintenance MIP Interface Cable Pinouts ...
Страница 270: ...B 12 Cisco 7010 Hardware Installation and Maintenance Interface Processor LEDs ...
Страница 274: ...C 4 Cisco 7000 Hardware Installation and Maintenance ...
Страница 287: ...Index 13 ...