400G Network

September 14, 2019


1. What is a QSFP-DD Optical Modules? A QSFP-DD Optical Transceiver with double density features, it refers doubling the number of high speed transmitter and receiver for the optical signal transmitting. The QSFP-DD transceivers is ready for the new PAM4 function for supporting 50Gbps per channel, which could support bandwidth over 400Gbps via MPO/MTP fiber […]

July 16, 2019

Optical Interface for QSFP-DD Bidi Transceivers

Currently, 400G QSFP-DD transceivers use 8 pairs of MMF to transmit signal in short distance, while bidirectional (BiDi) technology enables users to save the fibers for new data center deployment or maximize their usage of the existing fiber cabling infrastructure. the following article briefly explains the latest connector for QSFP-DD BIDI transceivers. 1. MPO Optical […]

April 19, 2019

What is Mini Duplex Connector (MDC)

MDC Mini Duplex Connector is the latest connector US Conec showcase in OFC2019, it is the latest form factor and a joint effort between US Conec and Corning. It is similar to SN Connector developed by SENKO. The MDC is a dual-fiber connector manufactured with current 1.25mm ceramic ferrule technology used in the popular industry […]

April 11, 2019

Do you know these terminologies for 400G Transceivers

OSFP Octal Small Form Factor Pluggable QSFP-DD Quad Small Form Factor Pluggable –  Double Density CFP8 C Form-factor Pluggable 8-times density QSFP56-DD Quad Small Form Factor Pluggable 56 –  Double Density COBO Consortium for On-Board Optics FEC Forward Error Correction PAM4 Pulse Amplitude Modulation 4-Level DCO Digital Coherent Optics I2C Inter-Integrated Circuit (QSFP+/QSFP28 management interface) […]

April 4, 2019

Impact of the new 400G PMD on Cabling and Connectivity

Based on Dell’Oro Group report, the Crossover Points of 40G to 400G Ethernet switching will be at the end of year 2019, and the Crossover Point of 100G to 400G Ethernet switching is at the mid of year 2010. Before we move to the era of 400G, Understanding the impact of these new 400G PMDs […]

February 17, 2019

Introduction to 400GBASE-SR4.2 (BiDi) Standard

The 400GBASE-SR4.2 (BiDi) Standard was announced by the 400G Bidirectional (BiDi) MSA (Multisource Agreement) Group in the year 2018. The specification will be named 400G-BD4.2, to identify the bidirectional use of four lasers each of two colors. Using the 400G-BD4.2 specification, two transceivers communicate over lengths up to 70 meters (OM3 MMF Multimode fiber), 100m […]

December 23, 2018

What do the suffixes “SR8, DR4, xDR4 FR4 and 2FR4” stand for OSFP Modules?

The letters are reach specifications, and the number refers to the number of optical channels: Description Connector Type SR8: “SR” refers to 100m reach using multi-mode fiber, and “8” implies there are 8 optical channels. Each of the 8 optical channels from an SR8 module are carried on separate fibers, resulting in a total of […]

December 11, 2018

400G OSFP Transceivers and Its Fiber Type and Connector Type

The OSFP stands for an “Octal Small Form-factor Pluggable”. It is described as an “Octal” module because the electrical interface of an OSFP connector consists of 8 electrical lanes, running at 50Gb/s each, for a total of bandwidth of 400Gb/s. OSFP SR8, 8x50G Optical transceiver module is designed for use in 400 Gigabit links over […]

December 5, 2018

400G QSFP-DD Transceivers and Its Fiber Type and Connector Type

The QSFP-DD stands for a “Quad Small Form-factor Pluggable (QSFP) – Double Density (DD)”. The QSFP-DD connector also has 8 electrical lanes. The QSFP-DD form factor is similar to the QSFP form factor, except a second row of electrical contacts has been added to the QSFP connector in order to increase the number of high […]

November 24, 2018

Ist OM5 die Marktwahl für das Rechenzentrum?

Was ist OM5? OM5 geht einen Schritt weiter. Wie man aus der Tabelle ersehen kann, unterscheiden sich die Eckdaten bei 850nm nicht von OM4, jedoch ist das Übertragungsfenster vergrößert worden, so dass ein nutzbarer Wellenlängenbereich von 850 bis 953nm zur Verfügung steht (WBMMF = Wide Band Multimode Fiber). Mit den heute üblichen VCSEL Lasern als […]