The HelEOS gateway node converts a fiber based 10G Ethernet SFP+ signal into a coaxial RF signal. Usually a gateway node will be placed at the both ends of a HelEOS point to point connection. There are two versions of the Gateway Node a Near End (NE) and a Far End (FE) version. They differ just in the frequencies the system sends and receive in, as one system sends in the low frequencies and the other must receive in that frequencies and vice versa.
Additional to the functional versions ther is a addition Dual Gateway option.
The system was designed to operate parallel to existing DOCSIS and DVB-C services in a HFC access network.
This HelEOS Gateway Node product is available in the German BK format and the international used compact node enclosure.
Ethernet and USB Interfaces:
2 x SFP+ slot (for 10Gbit/s SFP+ Transceiver modules). Only one of the ports is operational the second one can be used for backup scenarios.
RJ45 100 Mbit/s SUB-D connector or SFP 100 Mbit/s connector (Management)
USB OTG port for local management (e.g. technician)
Local Management via RJ45/SFP or USB OTG port
Remote Management to downstream or upstream HelEOS node via in-band RF link
Management protocol: ssh CLI, GUI application TCP/IP or SNMP V2/V3
10G RF interface:
Coaxial Connector: F-Type 75 Ohms
Frequency Division Duplex up to full duplex 10 Gbit/s downstream plus 10Gbit/s upstream
Frequencies: 400 MHz – 4 GHz
Max baud rate 1.6 GHz
Link budget: -54dB at QAM 1024 and -81dB at BPSK
BPSK, QPSK, 16, 31, 64, 128, 256, 512, 1024 QAM with error free adaptive modulation
Timing and Delay:
Ethernet frame single hop delay: 10us
System supports Synchronous Ethernet clock transfer
Synchronization PTP 1588V2 transparent clock.
- 24 V DC, allowed range 21 V – 26 V DC
- power consumption is 28W, typical 25W, eco mode with lower performance 20W
- 10 % to 90 %, non-condensing
- Operating ambient temperature: -25°C to 55°C
- CE certificate
- ESD protection according to IEC 61000-4-2 level 4:
- ±8kV contact discharge
- ±15kV air discharge
- ESD protection according to IEC 61000-4-4 (EFT) (5/50ns) 20A (I/O), 40A (VDD)
- ESD Protection according to IEC 61000-4-5 (Lightning) 4A (8/20μs)