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DPON / DOCSIS PON

Optical Node Unit (CPE) for RFoG networks

In the interest of continuous product development, specifications may change without notice. Pbn.Dpon - Datasheet V2g - Released 26 Nov 10

About the Product

The Light Link

Direct DPON is the Optical Node Unit (ONU) for new "RFoG" (RF over Glass) Fibre-to-the-

Home (FTTH) architecture, and is optimized to work over PON standards-compliant FTTH networks. The

Society of Cable Telecommunications Engineers has issued their standard document IPS SP 910 to cover

the subject and set implementation guidelines

Rolling out RFoG makes it possible for a cable operator to continue the deployment of DOCSIS-compliant

cable modems for Internet and Telephony delivery, together with Video on Demand systems which need an

RF return path to operate. The DPON optical node looks just like an HFC network for all of the traditional

customer premises equipment.

The DPON is designed for 1550 nm forward-path RF signals, with return-path RF signals converted to optical

at either 1310 nm or 1610 nm in a 1 x 32 split FTTH network topology.

The DPON incorporates an isolated DFB optical laser to modulate the return-path signal from any RF set-top

box or DOCSIS modem onto the fibre. The photodiode featured on the duplex model provides a 1550 nm

CATV receiver with a forward path frequency response up to 1003 MHz. An optional CWDM combines these

forward and return-path signals across a 1310/1490 nm EPON/GPON network, offering a transitional

platform to migrate existing HFC two-way STB and DOCSIS modem technology to PON FTTH.

Employing leading edge system design, the DPON is a must-have in any FTTx/CATV solution. The power of

having a Passive Optical Network (PON), but still allowing an RF overlay, offers a multi-functional PON

delivering more services over the same infrastructure.

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