Cisco 4948 - Catalyst Switch - Page 94

B-4
Catalyst 4948E an Catalyst 4948E-F Switch Installation Guide
OL-21561-02
Appendix B Transceiver, Chassis Connectors, and Cable and Adapter Specifications
Transceiver Support for Uplink Ports
Table B-2 lists the specifications for the 1000BASE-T and 1000BASE-X SFP transceivers.
Ta b l e B-2 1000BASE-T and 1000BASE-X SFP Transceiver Specifications
SFP Transceiver
Module and Product
Number
Interface
Connector
Nominal
Wavelength
(nm)
Network
Cable Type
Fiber Core
Size
(micron)
Modal
Bandwidth
(MHz/km)
Cable Distance
1
1. Cable distances are based on fiber loss. Additional factors, such as the number of splices and the optical quality of the fiber, can affect cabling
distances.
1000BASE-T
(GLC-T=)
RJ-45 — Category 5,
5e, or 6
UTP/FTP
— — 328 ft (100 m)
1000BASE-SX
(GLC-SX-MM=)
LC duplex 850 MMF 62.5
62.5
50.0
50.0
160
200
400
500
722 ft (220 m)
902 ft (275 m)
1640 ft (500 m)
1804 ft (550 m)
1000BASE-LX/LH
(GLC-LH-SM=)
LC duplex 1300 MMF
2
SMF
2. A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP transceivers, and a short link distance
can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP transceiver with 62.5-micron diameter
MMF, you must also install a mode-conditioning patch cord between the SFP transceiver and the MMF cable on both the sending and receiving ends
of the link. The mode-conditioning patch cord is required for link distances greater than 984 ft (300 m).
62.5
50.0
50.0
G.652
3
3. ITU-T G.652 SMF as specified by the IEEE 802.3z standard.
500
400
500
—
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
6.21 mi (10 km)
1000BASE-ZX
(GLC-ZX-SM=)
LC duplex 1550 SMF G.652
3
— 43.4 to 62 mi (70 to
100 km)
4
4. 1000BASE-ZX SFP modules can reach up to 62 miles (100 km) by using dispersion-shifted SMF or low-attenuation SMF; the actual distance depends
on the fiber quality, the number of splices, and the connectors.
1000BASE-BX10
(GLC-BX-D=)
LC single 1490
(downstream)
SMF G.652
3
— 6.21 mi (10 km)
1000BASE-BX10
(GLC-BX-U=)
LC single 1310
(upstream)
SMF G.652
3
— 6.21 mi (10 km)