Cisco CATALYST 6509E 9 SLOT 15U CHASSIS NO POWER SUPPLY NO FAN TRAY Specification Guide
B-29
Catalyst 6500 Series Switches Installation Guide
OL-5781-04
Appendix B Transceivers, Module Connectors, and Cable Specifications
Cables
Mode-Conditioning Patch Cord
When using the long wavelength/long-haul (LX/LH) GBIC with 62.5-micron diameter MMF, you must
install a mode-conditioning patch cord (Cisco product number CAB-GELX-625 or equivalent) between
the GBIC and the multimode fiber (MMF) cable on both the transmit and receive ends of the link. The
9.8 foot (3 meter) patch cord is required for link distances greater than 984 feet (300 meters).
install a mode-conditioning patch cord (Cisco product number CAB-GELX-625 or equivalent) between
the GBIC and the multimode fiber (MMF) cable on both the transmit and receive ends of the link. The
9.8 foot (3 meter) patch cord is required for link distances greater than 984 feet (300 meters).
Note
We do not recommend using the LX/LH GBIC and MMF without the patch cord for very short link
distances of 33 to 328 feet (10 to 100 meters). The result could be an elevated bit error rate (BER).
distances of 33 to 328 feet (10 to 100 meters). The result could be an elevated bit error rate (BER).
The patch cord is required to comply with IEEE standards. IEEE found that link distances could not be
met with certain types of fiber-optic cable due to a problem in the center of some fiber-optic cable cores.
The solution is to launch light from the laser at a precise offset from the center by using the patch cord.
At the output of the patch cord, the LX/LH GBIC complies with the IEEE 802.3z standard for
1000BASE-LX.
met with certain types of fiber-optic cable due to a problem in the center of some fiber-optic cable cores.
The solution is to launch light from the laser at a precise offset from the center by using the patch cord.
At the output of the patch cord, the LX/LH GBIC complies with the IEEE 802.3z standard for
1000BASE-LX.
Patch Cord Configuration Example
shows a typical configuration using the patch cord.
Figure B-19 Patch Cord Configuration
4 (GND)
GND
5 (GND)
GND
6 (TxD)
Output
7 (DSR)
Input
8 (CTS)
1
Input
1.
Pin 1 is connected internally to Pin 8.
Table B-19 Port Mode 2 Signaling and Pinouts (Port Mode Switch Out) (continued)
Console Port
Console Device
1000BASE-LX/LH
port
Patch
panel
Link span greater than 984 ft
(300 m)
1000BASE-LX/LH
port
Rx
Tx
Patch
panel
Patch
cord
Building
cable plant
Tx
Rx
Patch
cord
13088