Table Of Contents
Cleaning the Fiber-Optic Connectors
Pluggable Transceivers
This appendix provides descriptions and cabling distance specifications for the pluggable optical and copper transceivers that are supported on the Catalyst 6500 series supervisor engine uplink ports. Table A-1 lists the supervisor engine models and the transceiver type and quantity that they support.
The appendix is divided into these topics:
•
Mode-Conditioning Patch Cords
•
GBIC Transceivers
1000BASE-T and 1000BASE-X GBIC transceivers are supported on the Supervisor Engine 2 uplink ports. Figure A-1 shows a typical 1000BASE-T (copper) GBIC transceiver equipped with an RJ-45 female connector. Figure A-2 shows a typical 1000BASE-X (optical) GBIC transceiver equipped with an SC duplex female connector.
Figure A-1 1000BASE-T GBIC Transceiver Module (WS-G5483)
Figure A-2 1000BASE-X GBIC Transceiver Modules (WS-G5484, WS-G5486, and WS-G5487)
Table A-2 lists the specifications and cabling distances for the different models of the GBIC transceiver.
Table A-2 GBIC Transceivers Specifications and Cabling Distances
(nm)
(MHz km)1000BASE-T
(WS-G5483)RJ-45
—
—
—
328 ft (100 m)
1000BASE-SX3
(WS-G5484)SC 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
(WS-G5486)SC duplex
1310
MMF4
SMF (NDSF)5
62.5
50.0
50.0
8.6-9.5
500
400
500
—
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
6.2 mi (10 km)
1000BASE-ZX6
(WS-G5487)SC duplex
1550
SMF (NDSF)
SMF (DSF)7
8.6-9.5
7.8-11
—
—
43.5 mi (70 km)8
62.1 mi (100 km)
1 The numbers given for multimode fiber-optic (MMF) cable refer to the core diameter; the numbers for single-mode fiber refer to mode field diameter.
2 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.
3 Use with MMF only.
4 When using an LX/LH GBIC with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord (CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link. The mode-conditioning patch cord is required for link distances less than 328 feet (100 m) to prevent overdriving the receiver. The mode-conditioning patch cord is also required for link distances greater than 984 feet (300 m) to reduce differential mode delay.
5 Nondispersion-shifted single-mode fiber-optic cable (ITU G.652 compliant).
6 Use with SMF only.
7 Dispersion-shifted single-mode fiber-optic cable (ITU G.653 compliant or G.655 compliant).
8 The minimum link distance for ZX GBICs is 6.2 miles (10 km), with an 8-dB attenuator installed at each end of the link. Without attenuators, the minimum link distance is 24.9 miles (40 km).
Table A-3 lists the fiber loss budgets for the GBIC optical transceivers.
Table A-3 Fiber Loss Budgets for GBIC Optical Transceivers
WS-G5484
1000BASE-SX
-3 (maximum)
-9.5 (minimum)
0 (maximum)
-17 (minimum)
WS-G5486
1000BASE-LX/LH
-3 (maximum)
-9.5 (minimum)
-3 (maximum)
-19 (minimum)
WS-G5487
1000BASE-ZX
-5 (maximum)
0 (minimum)
-3 (maximum)
-232 (minimum)
1 The maximum receive dBm value indicates the overload threshold of the receiver. The minimum receive dBm value indicates the lowest acceptable signal level coming into the receiver that allows correct signal recognition.
2 The WS-G5487 1000BASE-ZX GBIC provides a minimum optical power budget of 23 dB. To determine the supported link distance, you should measure your cable plant with an optical loss test set to verify that the optical loss of the cable plant (including connectors and splices) is less than or equal to the figure. The optical loss measurement must be performed with a 1550-nanometer light source.
Table A-4 lists the physical and environmental specifications for the GBIC transceivers.
Table A-4 1-GB GBIC Transceiver Physical and Environmental Specifications
Dimensions (H x W x D)
0.75 x 1.54 x 3.50 in. (19.0 x 39.1 x 88.9 mm)
Operating temperature
Storage temperature
32° to 122°F (0° to 50°C)
-40° to 185°F (-40° to 85°C)
Power consumption
1.5 W maximum1
1 The GBIC transceiver port can support up to 1.5 W maximum. An SX GBIC transceiver would typically consume less power than a ZX GBIC transceiver, but Cisco doesn't offer strict specifications for each type.
SFP Transceivers
1000BASE-T and 1000BASE-X SFP transceivers are supported on the following supervisor engines:
•
•
•
Figure A-3 shows the 1000BASE-T (copper) SFP transceiver equipped with an RJ-45 female connector. Figure A-4 shows a typical 1000BASE-X (optical) SFP transceiver equipped with an LC optical connector. Table A-5 lists the specifications and cabling distances for the different models of SFP transceivers.
Figure A-3 1000BASE-T SFP Transceiver (GLC-T)
RJ-45 female connector
Bale-clasp handle shown in the open (unlocked) position
Bale-clasp handle shown in the closed (locked) position
Figure A-4 1000BASE-X SFP Transceivers (GLC-SX-MM, GLC-LH-SM, and GLC-ZX-SM)
Table A-5 SFP Transceiver Cabling Specifications
1000BASE-T
(GLC-T=)RJ-45
—
Category 5, 5e, or 6 UTP/FTP
—
—
328 ft (100 m)
1000BASE-SX
(GLC-SX-MM=)3LC 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
MMF4
SMF (NDSF)5
62.5
50.0
50.0
8.6-9.5
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 (NDSF)
SMF (DSF)6
8.6-9.5
7.8-11
—
—
43.4 (70 km)
62 mi (100 km)7
1000BASE-BX-D
(GLC-BX-D=)LC single
1310
SMF (NDSF)
8.6-9.5
—
6.21 mi (10 km)
1000BASE-BX-U
(GLC-BX-U=)LC single
1490
SMF (NDSF)
8.6-9.5
—
6.21 mi (10 km)
1 The numbers given for multimode fiber-optic (MMF) cable refer to the core diameter; the numbers for single-mode fiber refer to mode field diameter.
2 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.
3 Use with MMF only.
4 A mode-conditioning patch cord is required. When using an LX/LH SFP with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord (CAB-MCP-LC or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link. The mode-conditioning patch cord is required for link distances less than 328 feet (100 m) to prevent overdriving the receiver. The mode-conditioning patch cord is also required for link distances greater than 984 feet (300 m) to reduce differential mode delay.
5 Nondispersion-shifted single-mode fiber-optic cable (ITU G.652 compliant).
6 Dispersion-shifted single-mode fiber-optic cable (ITU G.653 compliant or G.655 compliant).
7 1000BASE-ZX SFP modules can reach up to 62 miles (100 km) by using DSMF or low-attenuation SMF; the actual distance depends on the fiber quality, the number of splices, and the connectors.
Table A-6 lists the fiber loss budgets for the 1-GB SFP transceivers.
Table A-6 Fiber Loss Budgets for the 1-GB SFP Transceivers
GLC-SX-MM
(1000BASE-SX)
-4 (maximum)
-9.5 (minimum)
0 (maximum)
-17 (minimum)
GLC-LH-SM
(1000BASE-LX/LH)
-3 (maximum)
-9.5 (minimum)
-3 (maximum)
-20 (minimum)
GLC-ZX-SM
(1000BASE-ZX)
5 (maximum)
0 (minimum)
-3 (maximum)
-23 (minimum)
GLC-BX-U
-3 (maximum)
-9 (minimum)
-3 (maximum)
-19.5 (minimum)
GLC-BX-D
-3 (maximum)
-9 (minimum)
-3 (maximum)
-19.5 (minimum)
1 The maximum receive dBm value indicates the overload threshold of the receiver. The minimum receive dBm value indicates the lowest acceptable signal level coming into the receiver that allows correct signal recognition.
Table A-7 list the physical and environmental specifications for the SFP transceivers.
Table A-7 1-GB SFP Transceiver Physical and Environmental Specifications
Dimensions (H x W x D)
0.04 x 0.53 x 2.22 in. (8.5 x 13.4 x 56.5 mm)
Operating temperature
Storage temperature
32° to 122°F (0° to 50°C)
-40° to 185°F (-40° to 85°C)
Power consumption
1 W maximum1
1 The SFP transceiver port can support up to 1 W maximum. An SX SFP transceiver would typically consume less power than a ZX SFP transceiver, but Cisco doesn't offer strict specifications for each type.
Note
10-GB XENPAK Transceivers
The 10-GB XENPAK transceivers are supported on the Supervisor Engine 32 (WS-SUP32-10GE-3B and WS-S32-10GE-PISA only) uplink ports. Figure A-5 shows a typical XENPAK optical transceiver.
Figure A-5 10-Gigabit XENPACK Optical Transceiver
Captive installation screw
Optical bore dust plug
Transmit optical bore
Receive optical bore
Table A-8 lists the specifications and cabling distances for the different types of XENPAK transceivers.
Table A-8 10-GB XENPAK Transceiver Specifications and Cabling Distances
Distance2XENPAK-10GB-CX4
InfiniBand 4X
N/A
CX4 (copper)
—
—
49 ft (15 m)3
XENPAK-10GB-LX4
SC duplex
1310 nm
MMF
62.5
50.0
50.0
500
400
500
984.3 ft (300 m)4
787.4 ft (240 m)
984.3 ft (300 m)
XENPAK-10GB-LRM
SC duplex
1310 nm
MMF
62.5
50.0
50.0
500
400
500
721.8 ft (220 m)5
328 ft (100 m)
721.8 ft (220 m)
XENPAK-10GB-SR
SC duplex
850 nm
MMF
62.5
62.5
50.0
50.0
50.0
160
200
400
500
2000
83.3 ft (25 m)
108.3 ft (33 m)
216.5 ft (66 m)
269.0 ft (82 m)
984.3 ft (300 m)
XENPAK-10GB-LR/LR+
SC duplex
1310 nm
SMF (NDSF)6
8.6-9.5
—
6.2 mi (10 km)
XENPAK-10GB-ER/ER+7
SC duplex
1550 nm
SMF (NDSF)
8.6-9.5
—
24.9 mi (40 km)8
XENPAK-10GB-ZR
SC duplex
1550 nm
SMF
Operates on any SMF type
—
49.7 mi (80 km)
XENPAK-10GB-LW9
SC duplex
1310 m
SMF (NDSF)
8.6-9.5
—
6.2 mi (10 km)
1 The numbers given for multimode fiber-optic (MMF) cable refer to the core diameter; the numbers for single-mode fiber refer to mode field diameter.
2 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. Minimum cabling distance for all types is 2 m according to the IEEE 802.3ae standard.
3 The Cisco XENPAK-10GB-CX4 transceiver supports link lengths of up to 49.2 feet (15 m) on CX4 cable. Cisco offers four CX4 cables: CAB-INF-28G-1= (1 meter cable), CAB-INF-28G-5= (5 meter cable), CAB-INF-28G-10= (10 meter cable), and CAB-INF-28G-15= (15 meter cable).
4 The Cisco XENPAK-10GB-LX4 transceiver supports link lengths of 300 meters on standard Fiber Distributed Data Interface (FDDI) grade multimode fiber (MMF). To ensure that specifications are met, the transmitter output from the LX4 transceiver should be coupled through a mode conditioning patch cord. Cisco offers two mode conditioning patch cords: CAB-GELX-625= for 62.5 micron MMF (dual SC connectors) and CAB-MCP50-SC= for 50 micron MMF (dual SC connectors).
5 The Cisco XENPAK-10GB-LRM transceiver supports link lengths of 220 meters on standard Fiber Distributed Data Interface (FDDI) grade multimode fiber (MMF). To ensure that specifications are met over FDDI-grade, OM1 and OM2 fibers, the LRM transceiver transmitter should be coupled through a mode conditioning patch cord. Cisco offers two mode conditioning patch cords: CAB-GELX-625= for 62.5 micron MMF (dual SC connectors) and CAB-MCP50-SC= for 50 micron MMF (dual SC connectors). No mode conditioning patch cord is required for applications using OM3 fiber.
6 Nondispersion-shifted single-mode fiber-optic cable (ITU G.652 compliant).
7 Requires a 5 db 1550 nm fixed loss attenuator for cable distances less than 12.43 miles (20 km). The attenuator (WS-X6K-5DB-ATT=) is available from Cisco Systems
8 Links that are longer than 18.9 miles (30 km) are considered engineered links.
9 The XENPAK-10GB-LW (WAN PHY) is intended to allow the transport of 10-Gigabit Ethernet over traditional SONET/SDH infrastructure. The purpose of WAN-PHY is to make 10-Gigabit Ethernet compatible with SONET STS-192c format and data rate, as defined by ANSI, as well as the SDH VC-4-64c container specified by ITU.
Table A-9 lists the fiber loss budgets for the 10-GB XENPAK transceivers.
Table A-9 Fiber Loss Budgets for the 10-GB XENPAK Transceivers
XENPAK-10GB-LX4
-0.5 per lane (maximum)
-6.75 per lane (minimum)
-0.5 per lane (maximum)
-14.4 per lane (minimum)
XENPAK-10GB-LRM
0.5 (maximum)
-6.5 (minimum)
0.5 (maximum)
-8.4 (average minimum)2
-6.4 (OMA minimum)
XENPAK-10GB-SR
-1.2 (maximum)
-7.3 (minimum)
-1 (maximum)
-9.9 (minimum)
XENPAK-10GB-LR/LR+
0.5 (maximum)
-8.2 (minimum)
0.5 (maximum)
-14.4 (minimum)
XENPAK-10GB-LW
0.5 (maximum)
-8.2 (minimum)
0.5 (maximum)
-14.4 (minimum)
XENPAK-10GB-ER/ER+
4 (maximum)
-4.7 (minimum)
-1 (maximum)
-15.8 (minimum)
XENPAK-10GB-ZR
4 (maximum)
0 (minimum)
-7 (maximum)
-24 (minimum)
1 The maximum receive dBm value indicates the overload threshold of the receiver. The minimum receive dBm value indicates the lowest acceptable signal level coming into the receiver that allows correct signal recognition.
2 Both the average and the OMA specifications need to be met simultaneously.
Table A-10 lists the physical and environmental specifications for the XENPAK transceivers.
Table A-10 10-GB XENPAK Transceiver Physical and Environmental Specifications
Dimensions (H x W x D)
0.47 x 1.42 x 4.76 in. (18 x 36 x 121 mm)
Weight
Typically under 10.58 ounces (300 grams)
Operating temperature
Storage temperature
32° to 122°F (0° to 50°C)
-40° to 185°F (-40° to 85°C)
Power consumption
8 W maximum1
1 The XENPAK transceiver port can support up to 8 W maximum. An SR XENPAK transceiver would typically consume less power than a ZR XENPAK transceiver, but Cisco doesn't offer strict specifications for each type.
10-GB X2 Transceivers
The 10GBASE-X X2 transceivers are supported on the Supervisor Engine 720-10GE uplink ports. Figure A-6 shows the X2 transceiver with the major features identified.
Figure A-6 10-GB X2 Transceiver
Note
Table A-11 lists the cabling specifications for the X2 transceivers.
Table A-11 X2 Transceiver Cabling Specifications
X2-10GB-CX4
InfiniBand 4X
—
InfiniBand (copper)
—
—
49.2 feet (15 m)3
X2-10GB-SR
SC duplex
850
MMF
62.5
62.5
50.0
50.0
50.0
160
200
400
500
2000
85.3 feet (26 m)
108.3 feet (33 m)
216.5 feet (66 m)
269 feet (82 m)
984.3 feet (300 m)
X2-10GB-LRM
SC duplex
1310
MMF
62.5
50.0
50.0
500
400
500
721.8 feet (220 m)4
328 feet (100 m)
721.8 feet (220 m)
X2-10GB-LX4
SC duplex
1310
MMF
62.5
50.0
50.0
500
400
500
984.3 feet (300 m)5
787.4 feet (240 m)
984.3 feet (300 m)
X2-10GB-LR
SC duplex
1310
SMF (NDSF)6
8.6-9.5
—
6.21 miles (10 km)
X2-10GB-ER7
SC duplex
1550
SMF (NDSF)
8.6-9.5
—
24.84 miles (40 km)
X2-10GB-ZR
SC duplex
1530-1565
SMF (NDSF)
8.6-9.5
—
49.7 miles (80 km)
1 The numbers given for multimode fiber-optic (MMF) cable refer to the core diameter; the numbers for single-mode fiber refer to mode field diameter.
2 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.
3 The Cisco X2-10GB-CX4 transceiver supports link lengths of up to 49.2 feet (15 m) on CX4 cable. Cisco offers four CX4 cables: CAB-INF-28G-1= (1 meter cable), CAB-INF-28G-5= (5 meter cable), CAB-INF-28G-10= (10 meter cable), and CAB-INF-28G-15= (15 meter cable).
4 The Cisco X2-10GB-LRM transceiver supports link lengths of 220 meters on standard Fiber Distributed Data Interface (FDDI) grade multimode fiber (MMF). To ensure that specifications are met over FDDI-grade, OM1 and OM2 fibers, the transmitter should be coupled through a mode conditioning patch cord. Cisco offers two mode conditioning patch cords: CAB-GELX-625= (mode conditioning patch cable 62.5 microns, dual SC connectors) and CAB-MCP50-SC= (mode conditioning patch cable 50 microns, dual SC connectors). No mode conditioning patch cord is required for applications using OM3.
5 The Cisco X2-10GB-LX4 transceiver supports link lengths of 300 meters on standard Fiber Distributed Data Interface (FDDI) grade multimode fiber (MMF). To ensure that specifications are met, the transmitter output should be coupled through a mode conditioning patch cord. Cisco offers two mode conditioning patch cords: CAB-GELX-625= (mode conditioning patch cable, 62.5 microns, dual SC connectors) and CAB-MCP50-SC= (mode conditioning patch cable, 50 microns, dual SC connectors).
6 Nondispersion-shifted single-mode fiber-optic cable (ITU G.652 compliant).
7 Requires a 5 dB 1550 nm fixed loss attenuator for distances less than 20 km. The attenuator (WS-X6K-5DB-ATT=) is available from Cisco.
Table A-12 X2 Transceiver Optical Transmit and Receive Specifications
X2-10GB-SR
10GBASE-SR (850-nm MMF)
-1.2 (maximum)
-7.3 (minimum)
-1.0 (maximum)
-9.9 (minimum)
840 to 860
X2-10GB-LRM
10GBASE-LRM (1310-nm)
0.5 (maximum)
-6.5 (minimum)
0.5 (maximum)
-8.4 (minimum in average)
-6.4 (minimum in OMA)2
1260 to 1355
X2-10GB-LX4
10GBASE-LX4 (WWDM 1300-nm MMF)
-0.5 per lane (maximum)
-6.75 (minimum per lane in OMA)
-0.5 (maximum)
-14.4 per lane
Four lanes; overall range: 1269 to 1356
X2-10GB-LR
10GBASE-LR (1310-nm SMF)
0.5 (maximum)
-8.2 (minimum)
0.5 (maximum)
-14.4 (minimum)
Transmit—1260 to 1355
Receive—1260 to 15653
X2-10GB-ER
10GBASE-ER (1550-nm SMF)
4.0 (maximum)
-4.7 (minimum)
-1.0 (maximum)
-15.8 (minimum)
Transmit—1530 to 1565
Receive—1260 to 15653
X2-10GB-ZR
10GBASE-ZR
4.0 (maximum)
0.0 (minimum)
-7.0 (maximum)
-24.0 (minimum
Transmit—1530 to 1565
Receive—1530 to 15654
1 The maximum receive dBm value indicates the overload threshold of the receiver. The minimum receive dBm value indicates the lowest acceptable signal level coming into the receiver that allows correct signal recognition.
2 Both the average and the OMA specifications must be met simultaneously.
3 Even though the receiver can accept a wide wavelength range, the specifications are guaranteed for a signal within the transmit wavelength range.
4 The receiver can accept a wavelength range from 1260 to 1565 nm, but the specifications are guaranteed for a signal within the transmit wavelength range.
Figure A-7 X2 Transceiver Serial Number Label Locator
Table A-13 lists the physical and environmental specifications for the X2 transceiver.
Table A-13 10-GB X2 Transceiver Physical and Environmental Specifications
Dimensions (H x W x D)
0.53 x 1.41 x 3.58 in. (13.46 x 36 x 91 mm)
Operating temperature
Storage temperature
32° to 122°F (0° to 50°C)
-40° to 185°F (-40° to 85°C)
Power consumption
4 W maximum1
1 The X2 transceiver port can support up to 4 W maximum. An SR X2 transceiver would typically consume less power than a ZR X2 transceiver, but Cisco doesn't offer strict specifications for each type.
WDM Transceivers
The supervisor engine uplink ports also support WDM transceivers. This section covers the following supported WDM transceivers.
CWDM GBIC Transceivers
GBIC transceivers are supported on the Supervisor Engine 2 uplink ports. Figure A-8 shows a typical CWDM GBIC transceiver with the major features identified.
Figure A-8 CWDM GBIC Transceiver
Color arrow on label
Optical bore dust plug
Alignment groove
Receive optical bore
Spring clip
Color dot
Transmit optical bore
Table A-14 lists the CWDM GBIC model color codes and wavelengths.
DWDM GBIC Transceivers
The DWDM GBIC transceivers are supported on the Supervisor Engine 2 uplink ports. Figure A-9 shows a DWDM GBIC transceiver. Table A-15 lists the DWDM GBIC product numbers, the wavelengths they operate at, and the associated ITU channel numbers.
Figure A-9 DWDM GBIC Transceiver Module
CWDM SFP Transceivers
The CWDM SFP transceivers are supported on the following supervisor engine uplink ports:
•
•
•
Figure A-10 shows a CWDM SFP transceiver with the major features identified.
Figure A-10 CWDM SFP Transceiver
Table A-16 lists the DWDM SFP transceiver optical specifications.
Table A-16 CWDM SFP Transceiver Optical Specifications
Transmitter spectral width
0.2 nm
Transmitter optical output power
•
•
Receiver optical input wavelength
•
•
Receiver optical input power
•
•
•
1 At 2.12 Gbps, 140°F (60°C) case temperature.
2 At 1.25 Gbps, 140°F (60°C) case temperature.
Table A-17 lists the CWDM SFP transceivers, their associated color codes, and their wavelengths.
DWDM SFP Transceivers
The DWDM SFP transceivers are supported on the following supervisor engine uplink ports:
•
•
•
The DWDM SFP transceivers support 32 nontunable ITU 100-GHz wavelengths that are compatible with the Cisco ONS DWDM channel scheme.
Table A-18 lists the DWDM SFP transceiver optical specifications.
Table A-18 DWDM SFP Transceiver Optical Specifications
Transmitter spectral width
0.2 nm
Transmitter optical output power
•
•
Receiver optical input wavelength
•
•
Receiver optical input power
•
•
•
1 Power-limited performance.
2 Noise-limited performance.
Table A-19 lists the DWDM SFP transceivers, their optical wavelengths, and their associated ITU channel numbers.
DWDM XENPAK Transceivers
The DWDM XENPAK transceivers are supported on the Supervisor Engine 32 (WS-SUP32-10GE-3B and WS-S32-10GE-PISA only) uplink ports. There are 32 nontunable ITU 100-GHz wavelengths that are compatible with the Cisco ONS DWDM channel scheme. The DWDM XENPAK transceivers support digital optical monitoring (DOM). Figure A-11 shows a DWDM XENPAK transceiver with the major features identified.
Figure A-11 DWDM XENPACK Optical Transceiver
Captive installation screw
Optical bore dust plug
Transmit optical bore
Receive optical bore
Table A-20 lists the DWDM XENPAK transceiver optical specifications.
Table A-20 DWDM XENPAK Transceiver Optical Specifications
Transmitter spectral width
0.2 nm
Transmitter optical output power
•
•
Receiver optical input wavelength
•
•
Receiver optical input power
•
•
•
1 Power-limited performance.
2 Noise-limited performance.
Table A-21 lists the physical and environmental specifications for the DWDM XENPAK transceivers.
Table A-22 lists the DWDM XENPAK transceivers, their wavelengths, and their associated ITU channel numbers.
DWDM X2 Transceivers
The DWDM X2 transceivers are supported on the Supervisor Engine 720-10GE (VS-S720-10G-3C and VS-S720-10G-3CXL) uplink ports. There are 32 nontunable ITU 100-GHz wavelengths that are compatible with the Cisco ONS DWDM channel scheme. The DWDM X2 transceivers support digital optical monitoring (DOM). Figure A-12 shows the DWDM X2 transceiver with the major features identified.
Figure A-12 DWDM X2 Transceiver
Table A-23 lists the DWDM X2 transceiver optical specifications.
Table A-24 lists the DWDM X2 transceivers, their optical wavelengths, and their associated ITU channel numbers.
Mode-Conditioning Patch Cords
A mode-conditioning patch cord is recommended for use between optical transceivers that use lasers operating at 1300 nm and certain types of multimode fiber (MMF) optic cable. In situations where an optical transceiver operating at 1300 nm needs to be coupled to a short length of FDDI-grade, OM1, or OM2 fiber cable, a mode-conditioning patch cord needs to be inserted at both ends of the link to prevent the optical transceiver receivers from being overdriven. In situations where an 1300 nm laser transceiver needs to be coupled to a long length of FDDI-grade, OM1, or OM2 fiber cable, a MCP needs to be inserted at both ends of the link to reduce the effects of differential mode delay.
When an unconditioned laser source designed for operation on single-mode optical fiber is directly coupled to a multimode optical fiber cable, an effect known as differential mode delay (DMD) might result in a degradation of the modal bandwidth of the optical fiber cable.
This degradation results in a decrease in the link span (the distance between a transmitter and a receiver) that can be supported reliably. The effect of DMD can be overcome by conditioning the launch characteristics of a laser source. A practical means of performing this conditioning is to use a device called a mode-conditioning patch cord.
A mode-conditioning patch cord assembly is composed of duplex optical fibers, including a single-mode-to-multimode offset launch fiber connected to the transmitter, and a second conventional graded-index multimode optical fiber connected to the receiver. Table A-25 lists and describes the three types of mode-conditioning patch cords available from Cisco.
Table A-25 Mode-Conditioning Patch Cords
CAB-GELX-625=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a 62.5-micron multimode optical fiber with duplex SC male connectors at both ends. The patch cord is 3 meters (9.84 feet) in length. (See Figure A-13.)
CAB-MCP50-SC=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a 50-micron multimode optical fiber with duplex SC male connectors at both ends. The patch cord is 1 meter (3.28 feet) in length. (See Figure A-13.)
CAB-MCP-LC=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a 62.5-micron multimode optical fiber with duplex SC male connectors at one end and duplex LC male connectors at the other end. The patch cord is 1 meter (3.28 feet) in length. (See Figure A-14.)
Figure A-13 Mode Conditioning Patch Cord with SC (GBIC Transceiver) Connector
Figure A-14 Mode Conditioning Patch Cord with LC (SFP Transceiver) Connector
Table A-26 lists the mode-conditioning patch cord requirements for 1-Gigabit and 10-Gigabit LX/LH, LX4, and LRM transceivers.
Cleaning the Fiber-Optic Connectors
Fiber-optic connectors are used to connect two optical fibers together. In a fiber-optic system, light is transmitted through an extremely small fiber core; 62.5 microns or less in diameter for multimode fiber-optic cable and 8 to 10 microns in diameter for single-mode fiber-optic cable. Because dust particles can range from a tenth of a micron to several microns in diameter, any contamination on the end face of the fiber core can degrade the performance of the connector interface where the two cores meet. Therefore, the connectors must be precisely aligned, and the connector interface must be absolutely free of trapped foreign material.
Note
Caution
To clean the optical connectors, use a CLETOP cassette cleaner and follow the product directions. If a CLETOP cassette cleaner is not available or if you want additional cleaning information, refer to the Inspection and Cleaning Procedures for Fiber-Optic Connections document at the following URL:
http://www.cisco.com/en/US/tech/tk482/tk876/technologies_white_paper09186a0080254eba.shtml
Warning
