Technology Distance Specifications; Mode Conditioning Patch Cord - HPE OfficeConnect 1920S Series Installation And Getting Started Manual

Note on 1000BASE-T Cable Requirements. The Category 5 networking cables that work for 100BASE-
TX connections should also work for 1000BASE-T, as long as all four-pairs are connected. But, for the
most robust connections, you should use cabling that complies with the Category 5e specifications, as
described in Addendum 5 to the TIA-568-A standard (ANSI/TIA/EIA-568-A-5).
Because of the increased speed provided by 1000BASE-T (Gigabit-T), network cable quality is more
important than for either 10BASE-T or 100BASE-TX. Cabling plants being used to carry 1000BASE-T
networking must comply with the IEEE 802.3ab standards. In particular, the cabling must pass tests for
Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). Additionally, unlike the cables
for 100BASE-TX, the 1000BASE-T cables must pass tests for Equal-Level Far-End Crosstalk (ELFEXT)
and Return Loss.
When testing your cabling, be sure to include the patch cables that connect the switch and other end
devices to the patch panels on your site. The patch cables are frequently overlooked when testing cable
and they must also comply with the cabling standards.

Technology Distance Specifications

Technology
100-FX
1000-T
1000-SX
1000-LX

Mode Conditioning Patch Cord

The following information applies to installations in which multimode fiber-optic cables are connected to a
Gigabit-LX port. Multimode cable has a design characteristic called "Differential Mode Delay", which
requires the transmission signals be "conditioned" to compensate for the cable design and thus prevent
resulting transmission errors.
Under certain circumstances, depending on the cable used and the lengths of the cable runs, an external
Mode Conditioning Patch Cord may need to be installed between the Gigabit-LX transmitting device and
the multimode network cable to provide the transmission conditioning. If you experience a high number of
transmission errors on those ports, usually CRC or FCS errors, you may need to install one of these
patch cords between the fiber-optic port in your switch and your multimode fiber-optic network cabling, at
both ends of the network link.
The patch cord consists of a short length of single mode fiber cable coupled to graded-index multimode
fiber cable on the transmit side, and only multimode cable on the receive side. The section of single mode
fiber is connected in such a way that it minimizes the effects of the differential mode delay in the
multimode cable.
Supported cable type
multimode fiber
twisted-pair copper
multimode fiber
multimode fiber
single mode fiber
Multimode fibermodal
bandwidth
any
N/A
160 MHz*km
200 MHz*km
400 MHz*km
500 MHz*km
400 MHz*km
500 MHz*km
N/A
Technology Distance Specifications
Supported distances
up to 2,000 meters
up to 100 meters
2 - 220 meters
2 - 275 meters
2 - 500 meters
2 - 550 meters
2 - 550 meters
2 - 550 meters
2 - 10,000 meters
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