Issue link: https://www.e-digitaleditions.com/i/1386104
10 I ICT TODAY TABLE 1: 200G transceiver options with PSM4 and SR4 are the most currently prevalent on the market. TABLE 2: 400G transceiver options highlight the prevalence of singlemode solutions. 200G Transceiver STD MFR Form Factor Breakout Option Fiber Type Distance (meters) # of fibers Connector 1 200G-FR4 IEEE None TBD No OS2 2,000 2 LC 2 200G-DR4 IEEE None TBD Yes OS2 500 8 12F MPO 3 2x100-PSM4 Prop. Cisco QSFP-DD Yes OS2 500 24 24F MPO 4 200G-SR4 IEEE None TBD Yes OM3/OM4/OM5 70/100/100 8 12F MPO 5 2x100-SR4 Prop. Cisco QSFP-DD Yes OM3/OM4/OM5 70/100/100 24 24F MPO 6 2x100G-CWDM4 Prop. Cisco QSFP-DD Yes OS2 2,000 4 CS 400G Transceiver STD MFR Form Factor Breakout Option Fiber Type Distance (meters) # of fibers Connector 1 400G-FR4 IEEE/ MSA Arista, Cisco, Juniper QSFP-DD, OSFP No OS2 2,000 2 LC 2 400G-DR4 IEEE Arista, Cisco, Juniper QSFP-DD, OSFP Yes OS2 500 8 12F MPO 3 400G-XDR4 (DR4+) Prop. Arista, Juniper QSFP-DD, OSFP Yes OS2 2,000 8 12F MPO 4 400G-SR8 IEEE Arista OSFP Yes OM3/OM4/OM5 70/100/100 16 16F/24F MPO 5 400G-SR4.2 (BD) IEEE/ MSA Cisco QSFP-DD Yes OM3/OM4/OM5 70/100/150 8 12F MPO 6 400G-2FR4 Prop. Arista OSFP Yes OS2 2,000 4 CS Note: List does not include long reach (10 km) options. - For 200 Gb/s transceiver options, only two are prev- alent on the market today: 2x100-PSM4 singlemode and 2x100-SR4 multimode as highlighted in Table 1. These are proprietary options introduced by Cisco, and they both rely on 24-fiber MPO conectors. While transceiver options using two-fiber LC or 8-fiber MPO connectors (1, 2, and 4 in Table 1) are defined in IEEE standards, they are relatively new to the market and expected to grow in sales and adoption. The 400 Gb/s transceivers are shown in Table 2. Rows 1, 2, and 5 are the options likely to become the most common over the next several years. Both 400GBASE-FR4 and 400GBASE-SR4.2, originally introduced by MSA between manufacturers, are now published IEEE standards. Other 400 Gb/s transceivers include interfaces under development that will reach beyond 10 kilometers (≈6.2 mi). It is important to note that the majority of 100, 200 and 400 Gb/s transceiver options are for single- mode networks because of bandwidth and distance capabilities. This trend is also partially a result of the decreasing cost of singlemode optics, prompted by their adoption by cloud companies with major purchasing power, and recent standards committee activities that specify more singlemode options for higher speeds. As this trend continues, the market in general may find singlemode solutions to be more enticing.