QSFP28 40/100G SR BD alternatives expedite delayed deployments
With a globally constricted supply of QSFP28 40/100G SR BD transceivers, many network operators are finding their hands tied by long backorders and excessive lead times. These QSFP28 40/100G SR BD transceivers are in high demand due to their historically low cost, ubiquitous applications in duplex MMF environments, and their versatility in 40G ports. This demand has elevated prices from OEM providers and drastically increased lead times.
Luckily for those needing a more immediate solution, bidirectional 40/100G SRs are not the only option available. Instead of waiting through an industry wide shortage with no end in sight, in many cases a savvy network manager can purchase and deploy an LR4 or CWDM4 and related SMF cabling as a more immediate solution at a competitive price point.
While LR4s and CWDM4s are traditionally thought of as higher priced solutions, LR4 and CWDM4 optics from ProLabs are not only budget friendly but are also available and ready to ship much sooner.
Is an alternative right for you?
Are you installing these modules opposite existing 40G or 40/100G bidirectional hardware?
If yes, unfortunately because the transmission types are different, the alternative solutions cannot be deployed opposite the existing modules. Even so, a total replacement of the existing 40G or 40/100G hardware may be a faster path to deploying a link over waiting through OEM backorders.
Is this link a new deployment with emphasis on cost and LC connector compatibility?
If yes, great! Fortunately, any of the types below can be used in pairs for your data links. If switching from MMF, you’ll also need the related SMF cabling to complete your new link.
Transceiver Type
Part Type | Transmission Type | Cabling Used | Max Distance |
2 bidirectional channels | LC MMF | 100m | |
4 muxed channels using higher wavelengths (1270nm to 1330nm) | LC SMF | 2km | |
4 muxed channels using higher wavelengths and LAN-WDM (1295nm to 1309nm) | LC SMF | 10km |
Benefits
Part Type | Low Cost | Duplex LC | Ports | Widely Available |
Yes | Yes | 40/100G | No | |
Yes | Yes | 100G | Yes | |
No | Yes | 100G | Yes |