With a huge abundance of promotional materials on the Web, the xPON topic, it seems to me, has not yet been sufficiently studied by many operators.Of course, for some, this is simply not necessary; for high-rise buildings today, the situation is very clearly in favor of Ethernet.But there are those who have already exhausted the "urban" subscriber base available for development, and are forced to send installation teams of telecom operators further and further "into the fields", closer to cottage settlements or even ordinary "villages".So far, everything is much simpler there - coverage of 3 / 4G networks of cellular operators, unfortunately, fortunately, is far from everywhere.Yes, and users who "picked up" on the forums of fashionable metropolitan habits want to see something similar even in a fierce CNN:Ethernet options have been discussed on nag.ru many times, so there is no point in dwelling on them in detail.With the current cost of fiber and optical ports, most of the problem of five, or even two or three years ago, has gone into oblivion.And it's hard to imagine an operator in 2013 that would not use Ethernet somewhere, sometime and for something.However, not everyone worked with xPON in practice.Therefore, I will start with a small educational program (which, if desired, can be easily "squandered").The OLT emits a carrier signal at 1490nm, while all ONTs emit the same wavelength at 1310nm.And since TDM, ONUs do not emit continuously, like a simple media converter to Ethernet, but only at certain time intervals (this process is controlled by the OLT).Because of this, the design of the ONT is much more complicated than that of a conventional media converter, and this is noticeably reflected in its cost.The transceivers are also special, WDM with Tx/Rx: 1490/1310nm (for OLT) and 1310/1490nm (ONT).The 1550nm window is specially reserved for cable TV, which can be mixed into the same optical network using special 1310/1490/1550nm WDM filters or 2xN splitters.On the subscriber side, subscriber devices are installed, which are called ONU / ONT (Optical Network Unit / Terminal), which are a small switch with an optical PON port and copper Ethernet ports for connecting subscriber Ethernet devices.Often WiFi, RF overlay, FXS VoIP ports are added to this.The question from the title has a simple formal answer: GPON (Gigabit PON) - ITU G.984, GEPON (Gigabit Ethernet PON) - IEE 802.3ah.But these numbers say almost nothing even to me.Therefore, it can be clarified: the GEPON frame structure is as similar as possible to Ethernet, while GPON has a more complex one, and is more reminiscent of SDH.And show the picture:GPON+ Fully standardized technology (ITU-T G.984 recommendation);+ Fully standardized OMCI management protocol (TR-069 protocol);+ Use of NRZ line code without redundancy ("honest" 2.5G);+ More efficient mechanisms for transferring TDM traffic;– Higher cost than GEPON;– More complex hardware configuration.GEPON (Turbo-GEPON) + Lower OLT price;+ Relatively simple equipment setup;– Technology without a standard (based on the IEEE 802.3ah standard);– Use of redundant 8B/10B line code (~20% less blank bandwidth).What to choose?It seems to me that at an equal price, GPON looks more attractive in one important point - compatibility.But in general, a lot depends on the vendor.Some, such as Huawei and ZTE, produce both GPON and GEPON solutions.Although GEPON from Huawei is not available for the Russian market.Other well-known manufacturers make only GPON, for example: Ericsson (the solution was recently sold to the American company Calix), Alcatel-Lucent, etc. GEPON solutions are simpler, and today they are made by many manufacturers in China.Including very little-known small companies.Therefore, the quality and reliability of such developments can only be guessed at.In Russia, solutions based on TurboGEPON are known to many thanks to Eltex products.Moreover, the GPON line is not available for "ordinary" operators - such solutions are usually supplied only for operators like Rostelecom.We decided to test this statement in practice.To do this, we took a gigabit media converter SNR-CVT-1000SFP-V2, plugged SNR-SFP-W34-20 (Tx / Rx 1310/1490nm) into it and connected it to the same tree with other working ONTs.As a result, the link to the OLT in this port was lost and all other ONTs in this port fell off."Myth" was 100% confirmed.Feature 2. The sensitivity of the ONT triplexer for 1550nm carrier is usually -8dBm (for 1490nm: -27dBm), so EDFA will need to be used in most cases for normal cable TV operation.Feature 3. ONU configuration and management is usually done through OLT (even operations such as firmware upgrade, reboot, laser off/on, etc. are performed remotely).ONUs, as a rule, support DDMI and are able to determine the distance to the OLT, which greatly facilitates troubleshooting:SWITCH> sh onu info-------------------------------------------------- --------------------------------OLT |ONU |STATUS |serial no.|Distance |Rx power |Profile-------------------------------------------------- --------------------------------1 |1 |active |SNRcbe3e359 |4769m |- 23.2 dBm |user11 |2 |active |SNRcbe3e1b9 |4657m |- 20.7 dBm |user21 |3 |active |SNRcbd38c12 |4825m |- 22.5dBm |user31 |4 |active |SNRcbd38ba4 |4823m |- 20.1 dBm |user41 |5 |active |SNRcbe3e329 |4694m |- 19.5 dBm |user51 |6 |active |SNRcbd38af4 |4755m |- 19.9 dBm |user61 |7 |active |SNRcbe3e249 |4476m |- 24.5 dBm |user71 |8 |active |SNRcbe3dd81 |4549m |- 19.1dBm |user81 |9 |active |SNRcbe3e0e1 |4763m |- 19.2 dBm |user91 |10 |active |SNRcbd38c2c |4812m |- 21.9 dBm |user10Feature 4. PON supports FEC (Forward Error Correction) technology.When transmitting data, redundant service information is added to the message, on the basis of which the original content of the "message" is then restored.I must say that in DWDM we had to meet FEC quite often.Gain in OSNR (Optical Signal to Noise Ratio) can be from ~6.5 to ~10.5dB.In GPON, I did not have to meet with FEC.The ITU-T white paper does not describe the gain in OSNR or optical budget.So, a traffic generator (2 computers with jperf) was connected to the OLT and ONT ports.SNR-SFP-W43-GPON-C+ (C+ class) is installed in OLT.For measurements, we use the SNR-PMT-08C power meter, as well as DDMI tools.SNR-OVA-01 serves as a variable attenuator.We find the maximum value of the signal power at the ONT input, at which packet losses and errors begin to appear: ~ -29.9dBm.At the same time, Tx Power SFP OLT: +5.62 dBm, attenuation introduced by the attenuator: 34.80dB (+ additional losses are introduced by patch cords and pass-through adapters).Signal strength on the ONT side by meter: -29.91dBmOLT |ONU |STATUS |serial no.|distance |Rx power |Profile-------------------------------------------------- ------------1 |1 |active |SNRcbd38c44 |2m |- 29.9 dBm |ONT#1Pon bip8 errors N/A 17SWITCH(config-gpon-olt[1])# show olt statistics onu 1-------------------------------------------------- ----------OLT : 1 ONU : 1 Downstream Upstream-------------------------------------------------- -----------Pon unreceived bursts N/A 27Pon onu positive drift val N/A 0Pon onu negative drift val N/A 0Pon bip8 errors N/A 17Pon fec corrected bytes N/A 0Mon fec corrected codewords N/A 0Mon fec uncorrected codewords N/A 0Mon fec received codewords N/A 0CRC dropped packets N/A 381CRC dropped packets N/A 522CRC dropped packets N/A 557SWITCH(config-gpon-olt[1])# show olt statistics-------------------------------------------------- -------------------------------OLT: 1 Downstream Upstream-------------------------------------------------- ------------------------------(Pon counter)Pon valid eth packets 155287 N/APon CPU packets 0 N/APonploams 0 0Pon invalid packets 0 163Priority Q0 forwarded packets 155287 293502CRC dropped packets N/A 163security dropped packets N/A 0security learn failures N/A 0header modifier forwarded packets 155287 N/Aheader modifier dropped packets 2 N/A.CRC dropped packets N/A 381.CRC dropped packets N/A 522.CRC dropped packets N/A 557After that, enable FEC in both directions (Upstream, Downstream).We remove statistics from ONU.We see that the number of processed and corrected bits and code words grows with the increase in the number of transmitted bits.This indicates that FEC is activated:SWITCH(config-gpon-olt[1])# show olt statistics onu 1-------------------------------------------------- -----------OLT : 1 ONU : 1 Downstream Upstream-------------------------------------------------- -----------Pon unreceived bursts N/A 27Pon onu positive drift val N/A 0Pon onu negative drift val N/A 516Pon bip8 errors N/A 17Pon fec corrected bytes N/A 88Mon fec corrected codewords N/A 21Mon fec uncorrected codewords N/A 0Pon fec received codewords N/A 831162SWITCH(config-gpon-olt[1])# sh olt statistics onu 1-------------------------------------------------- -----------OLT : 1 ONU : 1 Downstream Upstream-------------------------------------------------- -----------Pon unreceived bursts N/A 27Pon onu positive drift val N/A 0Pon onu negative drift val N/A 18185Pon bip8 errors N/A 17Pon fec corrected bytes N/A 3360Pon fec corrected codewords N/A 835Mon fec uncorrected codewords N/A 0Pon fec received codewords N/A 25632838SWITCH(config-gpon-olt[1])# show olt statistics-------------------------------------------------- ------------------------------OLT: 1 Downstream Upstream-------------------------------------------------- ------------------------------(Pon counter)Pon valid eth packets 3049342 N/APon CPU packets 371 N/APonploams 1791 931771Pon invalid packets N/A 0(performance monitoring counter)Rx valid packets 595592 N/ARx error packets 0 N/ACPU valid packets 0 0CPU dropped packets 0 557MAC lookup miss 0 N/APriority Q0 forwarded packets 595592 1148575CRC dropped packets N/A 557security dropped packets N/A 0security learn failures N/A 0header modifier forwarded packets 1197282 N/Aheader modifier dropped packets 2 N/ASWITCH(config-gpon-olt[1])# sh olt statistics-------------------------------------------------- ------------------------------OLT: 1 Downstream Upstream-------------------------------------------------- ------------------------------(Pon counter)Pon valid eth packets 1772646 N/APon CPU packets 720 N/APonploams 4116 888724Pon invalid packets N/A 0(performance monitoring counter)Rx valid packets 1810188 N/ARx error packets 0 N/ACPU valid packets 0 0CPU dropped packets 0 557MAC lookup miss 0 N/APriority Q0 forwarded packets 1810188 3532672CRC dropped packets N/A 557security dropped packets N/A 0security learn failures N/A 0 Splitters and optical budgetThere are two types of dividers: planar - PLC (Planar Lightwave Circuit) and welded - FBT (Fused Biconical Taper).We wrote about them in detail in the Divide and rule II or PLC review and in the knowledge base.ONUs usually use class B+ transceivers to keep the price of the subscriber unit as low as possible.Such a transceiver usually has the following characteristics: Tx Power: 0..+5dBm Rx Sensitivity: -27dBm In the OLT, SFP is usually also B + class, then the guaranteed optical budget is: DS / US: 0 - (-27) dB = 27dBBut if the budget is not enough (dividers with connectors and / or multiple division, for example, x2 / x4 / x8 or x4 / x4 / x4), then you can put a C + class SFP.They are more expensive, becausefor their production, it is necessary to select lasers with increased output power, and a more sensitive APD receiver.But their performance characteristics are much better: Tx Power: +3…+7dBm Rx Sensitivity: -32dBmThus, the guaranteed optical budget in both directions is already different: DownStream: 3-(-27)dB = 30dB UpStream: 0-(-32)dB = 32dB times), which is pretty good.1. Circuit with three dividers x2/x4/x8: 8 connectors - 0.5dB/pc.5 welded joints - 0.1dB/pc.PLC divider 1x2 - 4.1dB PLC divider 1x4 - 7.5dB PLC divider 1x8 - 10.8dB => (8*0.5 + 5*0.1 + 4.1 + 7.5 + 10.8)dB = 26.9dB2. Circuit with three dividers x4/x4/x4: 8 connectors - 0.5dB/pc.5 welded joints - 0.1dB/pc.PLC divider 1x4 - 7.5dB => (8*0.5 + 5*0.1 + 3* 7.5)dB = 27.0dB3. Circuit with two dividers x2/x32: 6 connectors - 0.5dB/pc.4 welded joints - 0.1dB/pc.PLC divider 1x2 - 4.1dB PLC divider 1x32 - 16.8dB => (6*0.5 + 4*0.1 + 4.1 + 16.8)dB = 24.3dB4. Circuit with two dividers x4/x16: 6 connectors - 0.5dB/pc.4 welded joints - 0.1dB/pc.PLC divider 1x4 - 7.5dB PLC divider 1x16 - 13.8dB => (6*0.5 + 4*0.1 + 7.5 + 13.8)dB = 24.9dBN = (Pout – X1 – S – R – Z*L) / X2 (1) where: N – number of connected ONUs;Pout – SFP OLT radiation power (dBm);X1 - maximum losses on the divider when 5% of the power is removed (dB);S is the sensitivity of the ONT receiver (dBm);R - additional losses in the line (welds, connectors, feed-through adapters, etc.) (dB);Z is the attenuation coefficient in the optical cable for the carrier 1310 nm (dB/km);L is the length of the optical cable (km);X2 - maximum losses on the divider when 95% of the power is removed (dB).N = (3 - 0.45 - (-27) - 4 - 0.35*2) ~= 24Let's calculate the signal level from the OLT, after passing through 24 dividers: P = Pout - X1*N - R - Z*L = (3 - 0.45*24 - 4 - 2*0.35) dBm= -12.5 dBm I must say that -12.5dBm - a fairly powerful signal, which allows further connection of several more ONUs.By putting, for example, 3 more 1x2 dividers with a division ratio of 50/50% (optical budget allows), you can connect another 4xONU.Thus, this scheme does not allow connecting a large number of ONTs to 1 OLT port, but may be relevant for GEPON solutions with a maximum number of 32xONU per 1 OLT port.Who is stronger elephant or whale xPON or Ethernet?In this scheme, 104 houses are connected (~30% less than in GPON).Dlink DES-3200-28F are used as access switches.At the subscriber - 100 Mbps media converter SNR-CVT-100GPON Article Name Quantity Price Sum SNR-FOCA-UT1-08 Optical cable SNR-FOCA-UT1-08 4 km 13,889.70 р.$55,558.80SNR-FOCD-FM-01 Optical cable SNR-FOCD-FM-01 13 km RUB 5,755.25$74,818.25SNR-KR-16N Universal tension bracket SNR-KR-16N 64 pcs.$99.35$6,358.40SNR-PA-06 Anchor wedge clamp SNR-PA-06 128 pcs.69.22 rubles$8,860.16SNR-KR-8N Fastener for lightweight FTTH and SNR-FOCA-UT1 cables 112 pcs.$27.85$3,119.20SNR-PA-37 Anchor wedge clamp PA-37 (small, plastic) 224 pcs.$108.78$24,366.72SNR-K2 Frame-drum SNR-K2 35 pcs.$560.00$19,600.00SNR-KR-16P Universal support bracket SNR-KR-16P 48 pcs.$99.35$4,768.80PPO-8/11-03 PPO-8/11-03 support clamp PPO-8/11-03 48 pcs.$30.50$1,464.00SNR-SB207.202 Stainless mounting tape С202, 20x0.7 mm (cassette 50m) 5 cassettes 1 476.76 р.$7,383.80SNR-HC-20-T Mounting clamp NS-20-T (100 pcs.) 3 pack.$712.52$2,136.56SNR-FTTH-FDB-16 Optical distribution box SNR-FTTH-FDB-16 5 pcs RUB 1,620.84$8,104.20SNR-FTTH-FDB-08 Optical distribution box SNR-FTTH-FDB-08 31 pcs.702.12 rubles21,765.72 rublesSNR-FTTH-FDB-04 Optical distribution box SNR-FTTH-FDB-04 1 pc 205.44 р.$205.44SNR-ADP-SC/APC SM SNR SC/APC-SC/APC feed-through adapter 348 pcs.$11.88$4,134.24SC-SM-APC-30/IN Ilsintech "Splice-On Connector" SC/APC optical connector for cable 3.0 mm / 2.0 x 3.1 328 pcs.$113.8839,630.24 rublesSNR-FTB-02S Optical socket SNR-FTB-02S 145 pcs.25.52 p.$3,700.40SNR-PC-SC/APC-15m Optical patch cord SC/APC-SM 15 meters 145 pcs.$103.22$14,966.90SNR-UPS-ONRT-1-M On-line uninterruptible power supply, 1000 VA 2 pcs.$4,785.00$9,570.00SNR-UPS-BCRT-1-M SNR-UPS-BCRT-1-M battery pack for 1kVA UPS 2 pcs.$8,389.70$16,779.40SNR-PLC-1x4-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 32 pcs.724.88 rubles23196.16 rub.SNR-PLC-1x8-SC/APC Planar divider for 8 taps, terminated with SC/APC plugs 7 pcs.1039.10 rub.7273.7 rub.SNR-PLC-1x2-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 2 pcs.573.9 rub.1147.90 rub.SNR-SFP-W43-GPON-C+ SFP WDM GPON module, range up to 20km (35dB), Tx/Rx: 1490/1310nm 3pcs.7141.22 rub.21423.66 rublesSNR-ONT-1G ONT GPON subscriber terminal with 1 port 10/100/1000-Base-T 145pcs.2452.13 rub.355558.85 rub.SNR-OLT-4x-8GC OLT station terminal with 4 GPON (SFP) ports and 8 10/100/1000-Base-T/SFP combo ports 1pc.86851.78 rub.86851.78 rub.SNR-OLT-PSU-AC AC Power Supply for GPON OLT SNR-OLT-4x-8GC 2pcs.8940.62 rub.17881.24 rub.ShTV-1-15.6.6-4AAA Heating cabinet 15 U 1 pc 31 200.00 rub 31 200.00 rub.Total: 869,547.92Article Name Quantity Price Sum SNR-FOCA-UT1-08 Optical cable SNR-FOCA-UT1-08 4 km 13 889.70 р.$55,558.80SNR-FOCD-FM-01 Optical cable SNR-FOCD-FM-01 13 km RUB 5,755.25$74,818.25SNR-KR-16N Universal tension bracket SNR-KR-16N 64 pcs.$99.35$6,358.40SNR-PA-06 Anchor wedge clamp SNR-PA-06 128 pcs.69.22 rubles$8,860.16SNR-KR-8N Fastener for lightweight FTTH and SNR-FOCA-UT1 cables 112 pcs.$27.85$3,119.20SNR-PA-37 Anchor wedge clamp PA-37 (small, plastic) 224 pcs.$108.78$24,366.72SNR-K2 Frame-drum SNR-K2 35 pcs.$560.00$19,600.00SNR-KR-16P Universal support bracket SNR-KR-16P 48 pcs.$99.35$4,768.80PPO-8/11-03 PPO-8/11-03 support clamp PPO-8/11-03 48 pcs.$30.50$1,464.00SNR-SB207.202 Stainless mounting tape С202, 20x0.7 mm (cassette 50m) 5 cassettes 1 476.76 р.$7,383.80SNR-HC-20-T Mounting clamp NS-20-T (100 pcs.) 3 pack.$712.52$2,136.56SNR-FTTH-FDB-16 Optical distribution box SNR-FTTH-FDB-16 5 pcs RUB 1,620.84$8,104.20SNR-FTTH-FDB-08 Optical distribution box SNR-FTTH-FDB-08 31 pcs.702.12 rubles21,765.72 rublesSNR-FTTH-FDB-04 Optical distribution box SNR-FTTH-FDB-04 1 pc 205.44 р.$205.44SNR-ADP-SC/APC SM SNR SC/APC-SC/APC feed-through adapter 348 pcs.$11.88$4,134.24SC-SM-APC-30/IN Ilsintech "Splice-On Connector" SC/APC optical connector for cable 3.0 mm / 2.0 x 3.1 328 pcs.$113.8839,630.24 rublesSNR-FTB-02S Optical socket SNR-FTB-02S 145 pcs.25.52 p.$3,700.40SNR-PC-SC/APC-15m Optical patch cord SC/APC-SM 15 meters 145 pcs.$103.22$14,966.90SNR-UPS-ONRT-1-M On-line uninterruptible power supply, 1000 VA 2 pcs.$4,785.00$9,570.00SNR-UPS-BCRT-1-M SNR-UPS-BCRT-1-M battery pack for 1kVA UPS 2 pcs.$8,389.70$16,779.40SNR-PLC-1x4-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 32 pcs.724.88 rubles23196.16 rub.SNR-PLC-1x8-SC/APC Planar divider for 8 taps, terminated with SC/APC plugs 7 pcs.1039.10 rub.7273.7 rub.SNR-PLC-1x2-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 2 pcs.573.9 rub.1147.90 rub.SNR-SFP-W43-GPON-C+ SFP WDM GPON module, range up to 20km (35dB), Tx/Rx: 1490/1310nm 3pcs.7141.22 rub.21423.66 rublesSNR-ONT-1G ONT GPON subscriber terminal with 1 port 10/100/1000-Base-T 145pcs.2452.13 rub.355558.85 rub.SNR-OLT-4x-8GC OLT station terminal with 4 GPON (SFP) ports and 8 10/100/1000-Base-T/SFP combo ports 1pc.86851.78 rub.86851.78 rub.SNR-OLT-PSU-AC AC Power Supply for GPON OLT SNR-OLT-4x-8GC 2pcs.8940.62 rub.17881.24 rub.ShTV-1-15.6.6-4AAA Heating cabinet 15 U 1 pc 31 200.00 rub 31 200.00 rub.Name Quantity Price Sum SNR-FOCA-UT1-08 Optical cable SNR-FOCA-UT1-08 4 km 13 889.70 р.$55,558.80SNR-FOCD-FM-01 Optical cable SNR-FOCD-FM-01 13 km RUB 5,755.25$74,818.25SNR-KR-16N Universal tension bracket SNR-KR-16N 64 pcs.$99.35$6,358.40SNR-PA-06 Anchor wedge clamp SNR-PA-06 128 pcs.69.22 rubles$8,860.16SNR-KR-8N Fastener for lightweight FTTH and SNR-FOCA-UT1 cables 112 pcs.$27.85$3,119.20SNR-PA-37 Anchor wedge clamp PA-37 (small, plastic) 224 pcs.$108.78$24,366.72SNR-K2 Frame-drum SNR-K2 35 pcs.$560.00$19,600.00SNR-KR-16P Universal support bracket SNR-KR-16P 48 pcs.$99.35$4,768.80PPO-8/11-03 PPO-8/11-03 support clamp PPO-8/11-03 48 pcs.$30.50$1,464.00SNR-SB207.202 Stainless mounting tape С202, 20x0.7 mm (cassette 50m) 5 cassettes 1 476.76 р.$7,383.80SNR-HC-20-T Mounting clamp NS-20-T (100 pcs.) 3 pack.$712.52$2,136.56SNR-FTTH-FDB-16 Optical distribution box SNR-FTTH-FDB-16 5 pcs RUB 1,620.84$8,104.20SNR-FTTH-FDB-08 Optical distribution box SNR-FTTH-FDB-08 31 pcs.702.12 rubles21,765.72 rublesSNR-FTTH-FDB-04 Optical distribution box SNR-FTTH-FDB-04 1 pc 205.44 р.$205.44SNR-ADP-SC/APC SM SNR SC/APC-SC/APC feed-through adapter 348 pcs.$11.88$4,134.24SC-SM-APC-30/IN Ilsintech "Splice-On Connector" SC/APC optical connector for cable 3.0 mm / 2.0 x 3.1 328 pcs.$113.8839,630.24 rublesSNR-FTB-02S Optical socket SNR-FTB-02S 145 pcs.25.52 p.$3,700.40SNR-PC-SC/APC-15m Optical patch cord SC/APC-SM 15 meters 145 pcs.$103.22$14,966.90SNR-UPS-ONRT-1-M On-line uninterruptible power supply, 1000 VA 2 pcs.$4,785.00$9,570.00SNR-UPS-BCRT-1-M SNR-UPS-BCRT-1-M battery pack for 1kVA UPS 2 pcs.$8,389.70$16,779.40SNR-PLC-1x4-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 32 pcs.724.88 rubles23196.16 rub.SNR-PLC-1x8-SC/APC Planar divider for 8 taps, terminated with SC/APC plugs 7 pcs.1039.10 rub.7273.7 rub.SNR-PLC-1x2-SC/APC Planar divider for 4 outlets, terminated with SC/APC plugs 2 pcs.573.9 rub.1147.90 rub.SNR-SFP-W43-GPON-C+ SFP WDM GPON module, range up to 20km (35dB), Tx/Rx: 1490/1310nm 3pcs.7141.22 rub.21423.66 rublesSNR-ONT-1G ONT GPON subscriber terminal with 1 port 10/100/1000-Base-T 145pcs.2452.13 rub.355558.85 rub.SNR-OLT-4x-8GC OLT station terminal with 4 GPON (SFP) ports and 8 10/100/1000-Base-T/SFP combo ports 1pc.86851.78 rub.86851.78 rub.SNR-OLT-PSU-AC AC Power Supply for GPON OLT SNR-OLT-4x-8GC 2pcs.8940.62 rub.17881.24 rub.ShTV-1-15.6.6-4AAA Heating cabinet 15 U 1 pc 31 200.00 rub 31 200.00 rub.Quantity Price Sum SNR-FOCA-UT1-08 Optical cable SNR-FOCA-UT1-08 4 km 13 889.70 р.$55,558.80SNR-FOCD-FM-01 Optical cable SNR-FOCD-FM-01 13 km RUB 5,755.25$74,818.25SNR-KR-16N Universal tension bracket SNR-KR-16N 64 pcs.$99.35$6,358.40SNR-PA-06 Anchor wedge clamp SNR-PA-06 128 pcs.69.22 rubles$8,860.16SNR-KR-8N Fastener for lightweight FTTH and SNR-FOCA-UT1 cables 112 pcs.$27.85$3,119.20SNR-PA-37 Anchor wedge clamp PA-37 (small, plastic) 224 pcs.$108.78$24,366.72SNR-K2 Frame-drum SNR-K2 35 pcs.$560.00$19,600.0064 pcs.35 pcs.48 pcs.48 pcs.31 pcs.2 pcs.2 pcs.1 PC.2 pcs.2 pcs.50 pcs.50 pcs.200 pcs.75 pcs.22 pcs.4 things.4 things.17 pcs.3 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.1 PC.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.130 pcs.90 pcs.50 pcs.20 pcs.1 PC.4 things.3 pcs.