Why TWDM is Superior to XG-PON1

Next Generation Communications Blog

Why TWDM is Superior to XG-PON1

By: Paula Bernier, TMC Executive Editor

Fiber-to-the-home networks service more than 130 households today, and PON is the dominant FTTH architecture. This trend is expected to continue, with 90 percent of the forecast 300 million FTTH subscribers by 2019 to be served by PON, according to Ovum.

As PON subscriber numbers grow, so will the types of users it can address. And that will include enterprise customers. That said, TWDM is the best and obvious way forward for service providers in the GPON realm, according to Ana Pesovic, senior marketing for wireline networks at Alcatel-Lucent who in a recent TechZine posting, TWDM technology moves ahead: XG-PON1, explains why TWDM is superior to XG-PON1 on a number of fronts. These include from a bandwidth perspective, in terms of revenue potential, and in its ability to lower carrier risk.

Ovum backs up those statements in its recent article TWDM-PON is on the horizon: Facilitating fast FTTx network monetization, in which the firm suggests that communications services providers would do well to leapfrog XG-PON1 and move on to TWDM-PON.

Ovum explains the case for TWDM citing its ability to:

  • Offers higher bandwidth, both on the downstream and the upstream (four times more bandwidth than xGPON1 and 20 times more bandwidth than current GPON networks)
  • Support higher ARPU customers like enterprises while allowing for pay-as-you-grow models
  • Use the same ODN as existing GPON networks, which means CSPs can leverage some of their existing network investments
  • Enable a robust ecosystem of component and equipment vendors, which are working on driving down costs of that gear
  • Be used in wireline and wireless-related service scenarios

“Now is the time CSPs should begin evaluating TWDM PON, analyzing deployment scenarios in terms of operational and monetary benefits,” Ovum suggests.

Pesvoic of Alcatel-Lucent, which launched its Universal TWDM-PON technology solution last year, agrees, commenting: “TWDM-PON lets operators offer high revenue generating commercial services, consolidate all services (residential, business and mobile backhaul) over one network, or perhaps co-invest to share deployment cost and risk. As a result, TWDM-PON monetizes the network faster.” 

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