Optical Node Unit for RFoG Applications

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.

Features

• Suitable for transmission of PAL or NTSC analogue TV channels as well as DVB-C or DVB-T digital television standards.
• Active Carrier Suppression (ACS) to allow up to 32 units to function within a PON HFC network compatible with DOCSIS 1, 2 or 3 standards, and with SCTE-standards ISP SP 910 for RFoG.
• In-built return path transmitter to suit set-top box systems where pay-per-view and other various return path information is sent via RF.
• Powered directly using the power socket or via the F-type connectors.
• The compact and sturdy enclosure fits easily into wiring closets or network termination boxes.
• Specifically designed to be SCTE ISP SP-910 standards compliant.