Appendix A Connector and Cable Specifications

Cable and Adapter Specifications

Table A-1

Fiber-Optic SFP Module Port Cabling Specifications (continued)

 

 

 

 

 

 

 

 

 

 

Wavelength

 

Core Size/Cladding

Modal Bandwidth

 

SFP Module

 

(nanometers)

Fiber Type

Size (micron)

(MHz/km)1

Cable Distance

1000BASE-ZX

 

1550

SMF

G.6522

43.4 to 62 miles

(GLC-ZX-SM

 

 

 

 

 

(70 to 100 km)4

CWDM

 

1470, 1490,

SMF

G.6522

62 miles (100 km)

 

 

1510, 1530,

 

 

 

 

 

 

1550, 1570,

 

 

 

 

 

 

1590, 1610

 

 

 

 

 

 

 

 

 

 

 

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).

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.

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.

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.

Two Twisted-Pair Cable Pinouts

Figure A-4and Figure A-5show the schematics of two twisted-pair cables for connecting to 10BASE-T- and 100BASE-TX-compatible devices.

Figure A-4

Switch

3 TD+

6 TD–

1 RD+

2 RD–

Figure A-5

Switch

3 TD+

6 TD–

1 RD+

2 RD–

OL-7677-04

Two Twisted-Pair Straight-Through Cable Schematic

Router or PC

3 RD+ 6 RD–

1 TD+

H5578

2 TD–

 

Two Twisted-Pair Crossover Cable Schematic

Switch

3TD+

6TD–

1 RD+

H5579

2 RD–

 

Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide

A-5

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Image 59
Cisco Systems Cisco ME 3400 manual Two Twisted-Pair Cable Pinouts