Cisco Systems Cisco ME 3400 Manual De Usuario
A-5
Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide
OL-7677-04
Appendix A Connector and Cable Specifications
Cable and Adapter Specifications
Note
When using shorter distances of single-mode fiber-optic cable, you might need to insert an inline optical
attenuator in the link to avoid overloading the receiver.
attenuator in the link to avoid overloading the receiver.
When the fiber-optic cable span is less than 15.43 miles (25 km), you should insert a 5-decibel (dB) or
10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the
1000BASE-ZX SFP module at each end of the link.
10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the
1000BASE-ZX SFP module at each end of the link.
Two Twisted-Pair Cable Pinouts
and
show the schematics of two twisted-pair cables for connecting to 10BASE-T-
and 100BASE-TX-compatible devices.
Figure A-4
Two Twisted-Pair Straight-Through Cable Schematic
Figure A-5
Two Twisted-Pair Crossover Cable Schematic
1000BASE-ZX
(GLC-ZX-SM
(GLC-ZX-SM
1550
SMF
G.652
2
—
43.4 to 62 miles
(70 to 100 km)
(70 to 100 km)
4
CWDM 1470,
1490,
1510, 1530,
1550, 1570,
1590, 1610
1550, 1570,
1590, 1610
SMF
G.652
2
—
62 miles (100 km)
1.
Modal bandwidth applies only to multimode fiber.
2.
A mode-field diameter/cladding diameter = 9 micrometers/125 micrometers
3.
A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP modules, and a short link distance
can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP module with 62.5-micron diameter MMF,
you must also install a mode-conditioning patch cord between the SFP module 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 feet (300 m).
can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP module with 62.5-micron diameter MMF,
you must also install a mode-conditioning patch cord between the SFP module 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 feet (300 m).
4.
1000BASE-ZX SFP modules can send data up to 62 miles (100 km) by using dispersion-shifted SMF or low-attenuation SMF; the distance depends
on the fiber quality, the number of splices, and the connectors.
on the fiber quality, the number of splices, and the connectors.
Table A-1
Fiber-Optic SFP Module Port Cabling Specifications (continued)
SFP Module
Wavelength
(nanometers)
(nanometers)
Fiber Type
Core Size/Cladding
Size (micron)
Size (micron)
Modal Bandwidth
(MHz/km)
(MHz/km)
1
Cable Distance
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Router or PC
3 RD+
6 RD–
6 RD–
1 TD+
2 TD–
2 TD–
H5578
Switch
3 TD+
6 TD–
1 RD+
2 RD–
Switch
3 TD+
6 TD–
6 TD–
1 RD+
2 RD–
2 RD–
H5579