Today’s Cable-TV networks are mainly using a coaxial cable infrastructure for the last mile combined with a fiber optic systems for the signal contribution known as HFC-networks. DOCSIS 3.1 aims to deliver 10+ Gbps downstream and 1+ Gbps in upstream. The new version should reduce the cost of transmission, increase the spectral efficiency, and improve the energy efficiency.
Moreover, to migrate to DOCSIS 3.1, the Cable-TV Operators must upgrade their optical Headends in a smart way. This requires a solution, which has low power consumption, cost efficient and high density optical transceivers. Furthermore, Cable-TV Operators are concerned by node segmentations and split in order to deliver higher bandwidths to the subscribers and reduce the congested noise.
In order to solve these challenges DELTA Electronics offers a unique high density and low-noise return path receiver platform which meets these requirements.
• High number of optical return-path receivers in 1 rack unit
• Compatible to any HFC/RFoG architecture
In this proposal, we focus on SFP-based low-noise optical return-path receivers with extremly low power consumption.
The depth of chassis complies with the standard size of todays’ street cabinets. The platform size is a compact 1 RU with the depth reduced. The adaptive management/monitoring are designed in the same chassis, so that no extra line card/equipment is needed for the management. The monitoring unit has a dynamic algorithm that detects which line card type is inserted in the chassis. The main platform is not limited to only a return-path receiver. The redundant hot-swappable power supply can be placed at front or the rear panel. The low power consumption of each line card is one of the valuable features of this universal platform.
The optical return-path receiver supports up to 10 SFP modules (20 Rx) in 1RU. It is energy efficient with less than 1.5 W per return-path receiver. The touch display of IPOD MIPI display allows monitoring the receivers. Next to the display there is a USB connector for updating the firmware. The software offers a user-friendly GUI to configure/monitor the parameters of each components in the chassis. On the rear panel, 20x75 Ω MCX RF outputs are designed to have a smooth transition between the receivers and the CMTS inputs. On the front, we offer an intelligent cooling concept that simplify the air-flow inside the chassis and let the module to cool down instantly irrespective of the ambient temperature. This enables a wide temperature range.
The complete chassis offers the highest Tx/Rx density in 1 RU, which increases the rack elevation in the Headend, and eases the cable management at the back. The depth of the chassis is minimized to allow simple cable managements at the back of the device, to simplify the air-flow, and to enable an easy access to the back of the equipment.
The SFP optical receiver Headend allows the operator to design the network in different ways irrespective of the architectures, namely, legacy HFC or RFoG - FTTx.