PRODUCT

Delaire USA offers qualification test links for 40G/100G

Delaire USA’s 8800 family of fibre-optic qualification test systems are designed to help verify the ability of high-speed optical network equipment to operate at the limits of cables defined by the 802.3 Ethernet standard. The latest addition to the product family allow full-duplex physical layer tests of 40 and 100 Gigabit Ethernet equipment.

In the 8800 test link equipment, each channel is composed of a pair of fibre-optic links, one transmit and one receive. This bidirectional test link architecture supports simultaneous multi-channel testing of both transmit and receive physical layer functions of a device such as router, switch or server, while operating under worst-case fibre bandwidth conditions. The 8800 can be used to test performance (e.g. bit error rate) and/or functionality (e.g. link configuration) of a single device’s transmitter and receiver or to test the interoperability of two devices under worst-case fibre bandwidth conditions.

Jeff Lapak, associate director at the University of New Hampshire Interoperability Laboratory said, “The Delaire USA bidirectional fibre-optic test link lets us easily connect devices together over a worst-case cable plant in order to verify interoperability under stressful optical conditions. Having all four channels under stress at the same time allows for rapid and robust interoperability testing on devices like routers, switches, and transceivers.”

The 8800 supports both multimode and singlemode fibre applications. It is fully configurable to meet custom requirements where the customer defines the operational parameters of the system and can therefore be used to test other standards such as OTN, InfiniBand and Fibre Channel.

As an example, the IEEE 802.3ba specification defines a maximum operating distance of 150m for 40GBASE-SR4 over OM4 fibre with an effective modal bandwidth (EMB) of 4700MHz/km (at 850nm). To enable this requirement to be tested, the full-duplex 8800 contains four bidirectional channels (eight links) of identical fibre cut to the same length (spooled to within an accuracy of +/- 0.06 per cent) terminated with MTP/MPO connectors. The actual length of each link is selected to provide the worst-case link bandwidth specified in the standard.

Company: 
Feature

Oleg Khaykin, CEO of Viavi Solutions, speaks candidly to Fibre Systems about how to compete in the challenging world of communications test and measurement

Feature

Hao Dong describes how innovative optical fibres and cabling could provide substantial benefits for connecting data centres across a wide range of distances

Feature

Richard Ednay considers whether fibre characterisation needs to be modified to suit modern optical communication systems that are likely to include coherent transmission

Feature

ECOC is the place to be to discover the latest technological and commercial innovations in optical components and networks. Here we highlight some of the exhibitors and events taking place in the exhibition hall.