Network Splitter｜Operator Fiber Extension Solution
Network shunt｜Optical fiber extension solution｜Rongteng Network
1. Introduction｜Network Shunt
With the implementation of the triple play, it is becoming more and more urgent to break through the technical bottleneck of the access network. Only by breaking the bandwidth limitation of the current access part can the entire network effectively play the role of bandwidth and truly promote the development of various services.
OEO optical relay equipment is used in the optical transmission process to realize optical signal re-amplification and shaping, as well as optical transmission equipment that can convert wavelength and mode. OEO can effectively save fiber resources and networking costs, and solve the problem of excessive fiber distance. OEO is widely used in long-distance transmission of various trunk lines. Its advantages are small size, economical safety, simple installation, etc. It is used in many fields of optical transmission.
EPON-OEO103 is an optical transmission device independently developed by Rongteng Network for re-amplifying signals during EPON optical transmission. It can effectively save the number of OLTs and extend the networking distance. The EPON link is connected in series, and the transmission distance can be extended to 40km to 80km without affecting the normal communication of the EPON system. The equipment complies with IEEE802.3ah and meets the relevant requirements for EPON equipment in "YD/T 1475-2006 Access Network Technical Requirements-Passive Optical Network (EPON) Based on Ethernet" and "China Telecom EPON Equipment Technical Requirements".
2. Solution｜Network Shunt
The Rongteng network optical fiber extension solution uses OEO optical relay technology, which refers to the phenomenon that when the optical signal is transmitted over a long distance, the dispersion cannot be eliminated during regeneration. Therefore, it is first converted into a signal and corrected by FEC. Then it is converted into optical signal transmission.
Schematic diagram of device application scenarios
The schematic diagram of EPON-OEO application scenarios shown in Figure 1.1 and Figure 1.2. Among them, Figure 1.1 is the use of extended distance, that is, the repeater is connected in series between the OLT and the ODN, and the extended distance can reach 60 (40+20) Km, excluding the attenuation between the repeater and the ODN (20dB)
Figure 1.1 Deployed between OLT and ODN
Figure 1.2 is the usage of extended users, that is, a series of repeaters after ODN can expand up to 64 users
Figure 1.2 Deployment between ODN and ONU
3. Equipment parameters
The fiber optic extension equipment of Rongteng Network is currently EPON OEO, and the equipment parameters are as follows:
3.1 System parameters
System parameters Technical index｜ ONU OLT
Receiving wavelength 1310nm 1490nm
Transmission wavelength 1490nm 1310nm
Maximum sensitivity -28dBm -27dBm
Minimum overload light intensity -6dBm -3dBm
Transmitted optical power >+1dBm >+1dBm
Deployment Mode Tandem Mode
Optical interface type SC-P
Upstream/downstream transmission rate 1.25G/1.25G bps
Uplink coding 8B/10B
Optical power budget PX 10/20
Split ratio 1:16, 1:32, maximum 1:64
Extinction ratio >+9dB
Jitter performance conforms to ITU-T G.825
Side mode suppression ratio >30db
Burst signal time <50ns
Fast AGC attenuation >10dB
Maximum transmission distance 60km 1:64 ODN network expansion OLT—>OEO 40km
3.2 Specifications
Specification Parameters Specification index
Dimensions (L*W*H) mm 187 mm*185.7 mm*48 mm
Input voltage DC12V
Power consumption 18W
Working temperature Temperature: -20° C ~ 70° C Humidity: 5 ~ 85%
Storage environment Temperature: -20° C ~ 75° ℃ Humidity: 5 ~ 95%
Safety and EWC comply with CSA and other standards
3.3 Features
Function Description
Remote control and upgrade Support remote control protocol and remote firmware upgrade
Statistics Count Supports data statistics for the entire data process, including byte statistics, message data statistics and real-time traffic statistics
Filtering function Support filtering according to specified fields (LLID, UDP, TCP port number); Support filtering according to message type (IPTV, Radius authentication); Support filtering according to port (OLT, ONU) rules and methods; in addition, can be customized.
Compatibility Compatible with EPON OLT and ONU equipment of different manufacturers; compatible with encrypted links and non-encrypted links, and supports the decryption of triple stirring data
Safety Support power-off bypass, support fault bypass
