08-18-2005 06:03 AM - edited 03-02-2019 11:45 PM
I have a situation where I must use the mode conditioning cables between my LX/LH interfaces and my multi-mode fiber. I have situations where I need to use both CAB-GELX-625= (GBIC) and CAB-MCP-LC= (SFP). My question revolves around the type of ends on the cables. According to
the cable for the GBIC interface seems to have both connector types as SC which means I will need an SC-to-ST converter to connect it to my infrastructure. Only big issue here is this adding to my distance. I am already looking at about 2000 ft on the fiber run. I am hoping that the splicing/connectors through out the run are not significant enough to cause issues.
I have been unable,however, to determine both ends on the SFP conditioning cable. I understand that the equipment end will be LC but what is on the cable end? I am getting ready to place the order for these and want to make sure I order the necessary piece parts to connect backinto my infrastructure.
Yes, I would have preferred single mode but this is an old infrastructure. This is is plan A with plan B probably being adding another switch in the middle to act as a repeater until I can get better fiber conditions. I plan on trying to get funds to replace this with single mode fiber next year. In the mean time I am stuck with what I have.
08-23-2005 01:17 PM
A mode-conditioning patch cord (product number CAB-GELX-625 or equivalent) is required to comply with IEEE standards. The IEEE found that link distances could not be met with certain types of fiber-optic cable cores. The solution is to launch light from the laser at a precise offset from the center, which is accomplished by using the mode-conditioning patch cord. At the output of the patch cord, the Cisco 1000BASE-LX/LH GBIC is compliant with the IEEE 802.3z standard for 1000BASE-LX.
http://www.cisco.com/en/US/products/hw/modules/ps872/products_data_sheet09186a008014cb5e.html
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