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QSFP28 (100G)

A QSFP28 is a Quad (4-channel) small form factor hot pluggable fibre optical transceiver used for 100 Gigabit Ethernet (100GbE) data communications applications. The QSFP28 integrates 4 transmit and 4 receiver channels. The number 28 means each lane carries up to 28G data rate. QSFP28 supports 4x25G breakout connection, 2x50G breakout, or 1x100G depending on the type of QSFP28 transceiver used. QSFP28 transceivers include SR4, LR4, IR4 PSM, CWDM4 and BiDi series.

Compliant with the following standards & protocols

  • IEEE 802.3bm
  • SFF-8661 (QSFP+ 4X Module Specification)
  • SFF-8672 (4X 28Gb/s Connector)
  • SFF-8679 (QSFP+ 4X Hardware and Electrical Specification)
  • SFF-8665 ( QSFP+ 4X 28 Gb/s Pluggable Transceiver Solution)

Below we detail the several options available when choosing your QSFP28 transceiver module.

Multimode Transmission

 Type Connector Max Distance Transmitter Max Power Standards

100G SR4

MPO/MTP 100m VCSEL 4w IEEE 802.3bm

 

Singlemode Serial Transmission

 Type Connector Max Distance Transmitter Max Power Standards

100G CWDM4

LC Duplex 10km 4 x CWDM 3.6w 100G CWDM4
100G LR4 LC Duplex 10km 4 x LAN WDM 3.6w IEEE 802.3ba
100G ER4  LC Duplex 40km 4 x LAN WDM EML 3.6w 100G 4 WDM-40 Rev 1

 

Singlemode Parallel Transmission

 Type Connector Max Distance Transmitter Max Power Standards

100G PSM4

MPO 2km DFB 3.46v IEEE 802.3bm, 100G PSM4 Rev 2

 

Detailed features by Technology

100G over Multimode Transmission

100GBASE-SR4
  • Transmits over multimode (OM3 or OM4) at 850nm
  • Supports a distance of up to 70m, over OM3 and 100m over OM4
  • Transmits 4 x 25G channels using 8 fibre cores (4 duplex pairs) to with a total data rate of 100Gbps
  • Each 25G channel can be connected to a different switch enabling one 100G port to connect to up to 4 other 25G ports
  • MTP/MPO optical connector
  • Single 3.3V Power Supply
  • Maximum power consumption 4W
  • Hot-Pluggable
  • Commercial Temperature Range 0~70°C

100G over Singlemode Serial Transmission

100GBASE-CWDM4, LR4, ER4

  • Transmits over singlemode LC Duplex at 1310nm (excl BiDi)
  • Supports distances of between 2km and 40km, depending on transceiver type
  • Capable of transmitting 100G over two fibres
  • Four separate wavelengths are simultaneously transmitted to carry four 25G lanes of data
  • LC Duplex optical connector
  • Single 3.3V Power Supply
  • Maximum power consumption 3.6W
  • Hot-Pluggable
  • Commercial Temperature Range 0~70

100G over Singlemode Parallel Transmission

100GBASE-PSM4

  • Transmits over singlemode MPO connector at 1310nm
  • Supports distances of up to 2km depending on transceiver type
  • Transmits 100G over 8 fibres with each of the four independent lanes 25G using two fibres
  • the 100G port can be connected to four 25G ports using a fibre breakout cable
  • MPO optical connector
  • Single 3.3V Power Supply
  • Maximum power consumption 3.46W
  • Hot-Pluggable
  • Commercial Temperature Range 0~70