Pacific Broadband Networks Headend Modular Equipment
DPON - Optical Node Unit for RFoG Applications
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.