Table 1 Transmission Distances for Different Media Types
| Transceiver Speed
|
Cable Type
|
Max. Distance Between Stations
|
10/100-Mbps Ethernet
|
Category 5 UTP
|
328 feet (100 m)
|
100-Mbps Ethernet
|
Multimode fiber
|
1640 feet (500 m)
|
1000-Mbps Ethernet
|
Multimode fiber
|
1640 feet (500 m)
|
1000-Mbps Ethernet
|
Single-mode fiber
|
16404 feet (5 km)
|
OC-3c, 155-Mbps ATM
|
Single-mode fiber
|
9 miles (15 km)
|
OC-3c, 155-Mbps ATM
|
Single-mode fiber, long reach
|
18 miles (30 km)
|
OC-3c, 155-Mbps ATM
|
Multimode fiber
|
1.2 miles (2 km)
|
OC-12c, 622-Mbps ATM
|
Single-mode fiber
|
9 miles (15 km)
|
OC-12c, 622-Mbps ATM
|
Single-mode fiber, long reach
|
25 miles (40 km)1
|
OC-12c, 622-Mbps ATM
|
Multimode fiber
|
1640 feet (500 m)
|
T1, 1.544-Mbps ATM
|
Category 5 twisted-pair
|
650 feet (198 m)
|
E1, 2.048-Mbps ATM
|
Category 5 twisted-pair and FTP (120-ohm)
|
650 feet (198 m)
|
E1, 2.048-Mbps ATM
|
Coaxial cable (75-ohm)
|
650 feet (198 m)
|
CE1, 2.048-Mbps ATM
|
Category 5 twisted-pair
|
650 feet (198 m)
|
CES T1
|
Category 5 twisted-pair and FTP
|
820 feet (248.5 m)
|
CES E1
|
Category 5 twisted-pair and FTP (120-ohm)
|
820 feet (248.5 m)
|
CES E1
|
Coaxial cable (75-ohm)
|
650 feet (198 m)
|
DS3, 45-Mbps
|
Coaxial cable
|
450 feet (137 m)
|
E3, 34-Mbps
|
Coaxial cable
|
450 feet (137 m)
|
CDS3, 45-Mbps
|
Coaxial cable
|
450 feet (137 m)
|
| If attaching a short cable to the 622-Mbps long-reach port adapter, you must add 10 dB of attenuation to the cable or the transmitter might overdrive the receiver and introduce data errors.
|
Pinouts to RJ-45 Connectors
The 10/100 Mbps Ethernet interface module with unshielded twisted-pair (UTP) ports supports RJ-45 connectors. Table 2 lists the signals for RJ-45 cable connectors.
Table 2 RJ-45 Connector Pinouts
| Pin
|
Signal
|
Description
|
1
|
RxD+
|
Receive data +
|
2
|
RxD-
|
Receive data -
|
3
|
NC
|
No connection
|
4
|
NC
|
No connection
|
5
|
NC
|
No connection
|
6
|
NC
|
No connection
|
7
|
TxD+
|
Transmit data +
|
8
|
TxD-
|
Transmit data -
|
Pinouts to RJ-48c Connectors
The T1, E1, CES T1 and E1 port adapters support RJ-48c connectors. Table 3 lists the signals for RJ-48c connectors.
Table 3 RJ-48c Connector Pinouts
| Pin
|
Description
|
1
|
Receive ring
|
2
|
Receive tip
|
3
|
No connection
|
4
|
Transmit ring
|
5
|
Transmit tip
|
6
|
No connection
|
7
|
No connection
|
8
|
No connection
|
Other Resources
Product Documentation
Catalyst 8540 CSR Documentation
http://www.cisco.com/univercd/cc/td/doc/product/l3sw/8540/
index.htm
Catalyst 8540 MSR Documentation
http://www.cisco.com/univercd/cc/td/doc/product/atm/c8540/
index.htm
Other Web Pages
Catalyst 8500 Series
http://www.cisco.com/warp/public/cc/cisco/mkt/switch/cat/8500/
Layer 3 Switching
http://www.cisco.com/warp/public/779/largeent/design/L3_backbone.html
ATM Switching
http://www.cisco.com/warp/public/730/General/
Catalyst 8540 CSR Software
(requires CCO authorization)
http://www.cisco.com/cgi-bin/tablebuild.pl/cat8540c
Catalyst 8540 MSR Software
(requires CCO authorization)
http://www.cisco.com/cgi-bin/tablebuild.pl/cat8540m
Posted: Wed Feb 26 21:21:49 PST 2003
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