Calix 725

The First Integrated RFOG Solution

The Calix 725 ONT provides the industry's first integrated GPON and RF Over Glass (RFOG) solution. This RF Return ONT enables two-way communication between video headends and RF consumer devices (set-top boxes, cable modems, etc.) Thus, service providers can use this innovative solution to offer advanced interactive services – such as video on demand (VOD), pay-per-view (PPV), and interactive programming guides – over an RF-based video network. The combination of the Calix 725 ONT and RF return technologies allows subscribers to enjoy a wide range of new attractive services, while service providers gain new revenue opportunities.

Calix 725 ONTs support industry standards, including DOCSIS Set-Top Gateway (DSG) as well as SCTE 55-1 (used by Motorola) and SCTE 55-2 (used by Scientific-Atlanta, a Cisco company). In addition, the product is designed to conform to the RFOG standard developed by the SCTE for PON deployments.

Prospective Customers

The Calix 725 ONT is ideally suited for independent telephone companies that own cable franchises and are interested in overbuilding these systems with FTTP. The Calix 725 ONT is also a perfect solution for cable operators interested in offering RFOG-based FTTP, with a simple upgrade path to GPON.

New Advanced Services

The Calix 725 ONT makes possible the bi-directional communication required for such advanced services as:

Interactive program guide.
Impulse Pay-Per-View (IPPV).
Video on demand (VOD) and VOD with interactive digital video recorder (DVR) functionality (pause, forward, reverse).
Digital ad insertion or VOD ad insertion.

The Unique Calix Approach to RF Return

The Calix approach is unique in several ways:

A single ONT provides transport for both the forward and reverse RF paths, as well as supporting two voice ports (TDM or VOIP) and a 100 Mbps Ethernet port.
Power management is incorporated during power outages.
The ONT can be operated as an RF node only (without GPON) for service providers that want to leverage their existing cable infrastructure and upgrade to GPON in the future.

Calix 725 ONTs feature integrated RF Return supporting the 5 to 42 MHz return path frequency band. Because the ONT does not sample or process the return path signals, the solution is transparent to the signals or protocols being sent.

The Calix RF return solution uses a fourth optical wavelength (1590 nm) on the PON. The system uses the same forward and reverse path topology and hardware currently used by cable operators.

Calix Technology Advantages

Compared with other RF Return solutions, Calix technology provides these advantages:

Physical layer transport only, no processing of return path signals.
Broadband transport of entire return path spectrum – no setup or provisioning of RF return path channels is required at the ONT.
Supports SCTE 55-1, SCTE 55-2, and DOCSIS with no timing changes to conditional access system or CMTS.
Supports legacy set-top boxes with out-of-band messaging, and next generation set-top boxes supporting DOCSIS Set-top Gateway.
Supports OCAP enabled set-top boxes and consumer electronics, which enables high speed user interaction, gaming, and future applications.
High reliability.
No additional fiber required on PON.
A completely integrated system – no additional hardware or cabling is needed at subscriber location.
GPON and RF return function fully managed by the OLT and ONT.
Does not consume upstream bandwidth or impact resources dedicated to voice and data services.
Low cost hybrid fiber-coaxial RF transport equipment; standard optical and RF combining of return path signals.
Supports full dynamic range of set-top boxes and cable modems.
Supports FSAN-compliant PON wavelengths.
Ability to operate with or without GPON being activated.
Non-proprietary solution compatible with FSAN interoperability between Calix 725 and 2.5 GPON OLTs.