1. FTTX Evolution
With the higher bandwidth requirement from internet users, now many ISPs are upgrading their access network. Compare with xDSL technology, FTTx has a much higher bandwidth, among different FTTx technology, GPON becomes more and more popular because of its reasonable cost and high bandwidth. As a leading Huawei FTTx solution provider, Huanetwork is known for competitive price, fast delivery and technical support capability.

2. What is the PON? OLT Passive Optical Network PSTN Internet CATV
ONU
Passive Optical Splitter
Optical Line Terminal
ONU
OLT
PSTN
Internet
Passive Optical Splitter
ONU
CATV
Optical Network Unit
PON is a port to multipoint (P2MP) structure of the passive optical network 2

3. Why is the GPON? GPON（Gigabit-capable Passive Optical Networks）3M 8M
25M
100M
ADSL/ADSL2+
Copper Based
VDSL / ADSL2+
PON
Fiber Based
2002
2003
2006
2010
Bandwidth
Internet
Video conference
Remote Control
Access
technology
Service
VoD
HD TV
Game
实况TV
HDTV
<3km
<2km
<1km
~5km
Coverage radius
GPON（Gigabit-capable Passive Optical Networks）
GPON supports Triple-play services, competition can provide full-service program
GPON supports high-bandwidth transmission, to meet user demand for high bandwidth services, such as HD TV, live TV, etc.
GPON supports 20Km long distance access, that can solve the twisted coverage problem, reduce the network nodes
GPON standard thoughtful, comprehensive support for integrated services

4. GPON principle--Data multiplexing
GPON system using WDM technology, single-fiber bidirectional transmission (mandatory)
In order to isolate multiple users on the same fiber direction of the signal to come and go, use the following two multiplexing:
Downstream use the broadcast technology;
Upstream uses TDMA(Time Division Multiple Access ) technology.
1490nm
1310nm

5. GPON principle----- Downstream
Broadcast

6. GPON principle----- Upstream
TDMA(Time Division Multiple Access )

7. GPON Basic network performance parameters
GPON Provide the following asynchronous transfer rate ：
Gbit/s up, Gbit/s down
Gbit/s up, Gbit/s down
Gbit/s up, Gbit/s down
Gbit/s up, Gbit/s down
Gbit/s up, Gbit/s down
Gbit/s up, Gbit/s down（ Main use rate ）
Gbit/s up, Gbit/s down
Support the maximum physical distance ：20km
Support the maximum distance difference ：20km
Splitting ratio 1：128

8. GPON network protection mode
There are two GPON interfaces port on OLT equipment.
Such protection was limited to the trunk fiber failure, the system will automatically switch to the backup system, to achieve the protection of fiber optic backbone 。
Object of protection is limited to the fiber between the OLT and the splitter and OLT board failure
ONU#1
OLT
IFpon
2：N splitter 
IFpon
IFpon
ONU#N
IFpon
Type B OLT Port backup

9. GPON network protection mode
ONU#1
There are two GPON interfaces port on the OLT and ONT 。
The GPON interfaces port on OLT work in 1:1 mode.
Such protection means an all-optical switching mode protection, OLT and ONU completely different between the two channels, you can ensure that all faults have been restored 。
IFpon
IFpon
1：N splitter
OLT
IFpon
IFpon
ONU#N
1：N splitter
IFpon
IFpon
Type C Full backup