Can GPON and EPON offer the same services: voice, data, video etc?
When we talk about GPON vs EPON, is it the equipment (OLT, ONT/ONU, etc.) that differentiate both technologies OR the installed cabling infrastructure also have an impact??? AND
Can we switch between GPON and EPON just by replacing the supported hardware (OLT, ONT/ONU, etc) OR we have to replace the cabling infrastructure as well???
What are the common differences b/w GPON & EPON, understandable from a layman’s perspective; assume that you are dealing with your non-technical client and you have to explain him the differences 🙂
EPON is a native Ethernet solution, while GPON leverages the techniques of transport Ethernet
In simple words You need GPON to deploy EPON.
What additional services GPON offer?
Fiber network opportunity in the future
GPON’s bandwidth is better
From subscriber prospective with 1:32 splitting ration GPON will have 74 MBPS and EPON max 30MBPS .
EPON is relatively a bit inexpensive.
GPON is with same function as EPON
The difference is GPON with bigger upstream 2.5G than EPON 1.25G, so the users feeling faster when uploading, that’s it, Right?
The same fiber passive infrastructure
Actual upload and download speed
Thanks everyone for your help.
Infrastructure remains same
Detail specification between EPON and GPON
GPON=1000/64= 15Mbps per customer
EPON= IEEE Standard
EPON=plug and play mode
GPON= need config.
EPON= Carried service(ETHERNET)
EPON= LESS COST
I Prefer gpon
The bandwidth calculations due to split and other loss factors
Please illuminate px 10/20/30….?
please illuminate px 10/20/30….? sure sir GPON is better but compare to epon gpon is too costly right?
Full reply to the questions.
Generally, the difference is just which standard is implemented in the ONTs and OLT line cards. However, optical loss budgets are not aligned between ITU-T ODN Classes, and the GEPON PMD specifications. For example, -PX20 specifies 26 dB, while Class B+ is 28 dB. This means that there may be cases where an ODN works with GPON, but not GEPON.
“What are the common differences b/w GPON & EPON, understandable from a layman’s perspective; assume that you are dealing with your non-technical client and you have to explain him the differences :)”
We have two sets of standards because of competition between standards committees, each designing to optimize for different objectives. In IEEE 802.3, vendors were in the majority; FSAN was controlled by network operators. As a result, GEPON was optimized for lowest cost (at initial volumes), time-to-market, and strict adherence to the Ethernet family of standards. GPON was optimized for bandwidth efficiency and fit with telecom operations and practices. At one time, GEPON was a considerably less expensive solution than GPON; that advantage has largely faded with time. GPON usable downstream rate is 2.488 Gb/s; standard GEPON is 1.00 Gb/s, although some vendors have non-standard 2 Gb/s products. Similarly, GPON usable upstream rate is 20% higher than GEPON. GPON has a shorter upstream guard time/interpacket gap, and provides upstream fragmentation, which allow higher upstream utilization. GPON has more extensive PHY layer management and ONT management capabilities than GEPON; these can be both a help and a burden. GPON extends traceable timing to the ONT, and can directly support precision timing with an accuracy of +/-3.4 ns.
lPTV or high quality video require QoS, low latency, etc…
both GPON and EPON can transport the same kind of services: voice, data, video.
To answer the question at the very beginning: both GPON and EPON can transport the same kind of services: voice, data, video. From that standpoint they are absolutely equivalent. Period. Everything else stops here: they are totally different from every technical aspect.
DS (downstream) and US (Upstream) detail
1) Both PONs(passive optical network) serve the same purpose, transfer data, with the same grade of fiber but different protocol electrically.
2) EPON is pushed by fast-paced ISPs so it borrowed IEEE 802.3 Gigabit Ethernet protocol and added MPCP(multiple-point control protocol) function.
DS line rate 1.25G data rate 1G
US line rate 1.25G data rate 1G
3) GPON is proposed by telecoms formed ITU-T so it is quite similar to BPON protocol.
DS line/data rate 2.488G
US line/data rate 1.244G
4) GPON standard has higher accuracy requirement on laser burst control so the equipment is more expensive then EPON. However GPON US line transmission efficiency is better then EPON.
5) All the service transmitted by EPON has to converted to Ethernet packet. For GPON, it’s optional since its transmit unit is GEM frame not Ethernet packet.
Hope this answer all your questions.
ITU-T standards about the GPON technology details
I am new to the GPON technology.
Is there a standard that explains it in more details, especially the overhead it uses?
I am looking for the overhead DS and US.
It looks like the downstream line is equivalent to a SONET OC-48 line (2.488Gbps) and the upstream line to an OC-24 line (1.244Gbps).
- FTTH PON Equipment Markets Forecast 2015
- Key considerations when moved from copper to fibre(PON)
- FOT Topic: PON port bandwidth & capacity
- GPON-EPON OLT and ONU’s Abbreviation Descriptions
- FOT Topic: Potential Gigabit Application in Fiber-Optic Broadband Network
- A guide to choose EPON/GPON equipment-Hardware