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Vectra 150 Mb/s Internet: Modem Router Guide, Cisco EPC3928S vs Technicolor CGA2121 vs Ubee EVW32B

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How can I use Vectra 150 Mb/s effectively over home Wi‑Fi, and does the supplied modem/router model matter?

To use Vectra 150 Mb/s effectively over Wi‑Fi, keep the provider’s modem and add your own dual-band router or AP behind it; the modem itself is not the part that provides the home Wi‑Fi network [#17697951][#17698069] For 150 Mb/s, the key is 5 GHz support on both the router and the client devices, because 2.4 GHz was described as poor and typically gives only about 20–30 Mb/s, while 5 GHz is much faster but loses range quickly through walls and ceilings [#17698946][#17699023][#17700162] In a two-level, 80 m apartment, a second router set as an access point and connected by cable was recommended rather than trying to rely on one box for everything [#17699190][#17699203] Suggested proven options were Ubiquiti UniFi AC Lite or Pro as an AP, and the Asus RT-AC66U was said to be worth buying for about PLN 200 [#17700119][#17731390] Even with better hardware, Wi‑Fi speed still depends heavily on apartment layout, wall count, and neighboring networks, so a cable connection will always give the best results [#17700162][#17699023][#17731455]
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  • #31 17700162
    KOCUREK1970
    Network and Internet specialist  
    Posts: 35131
    Help: 3786
    Rate: 5326
    permenentnie wrote:
    Will your own hardware calibration do something about the power of the received internet?

    The radio power in the band is max 100mW for 2.4GHz and 200mW for 5 GHz (I don't know what you can calibrate here with only this power), either the signal will break through or it will not work, or it will work or not.
    This is what wifi looks like - when it comes out, you have to check Sam, because each case is different due to the location of the apartment, its shape, number of walls, etc.
    It is enough that there will be 10 networks in the 2.4 GHz band in the block and there is already a meatball.
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  • #32 17701161
    Anonymous
    Level 1  
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  • #33 17701351
    KOCUREK1970
    Network and Internet specialist  
    Posts: 35131
    Help: 3786
    Rate: 5326
    jurek.adam wrote:
    The standard for the 5 GHz band is 500 mW.

    In domestic applications?
    Please indicate a specific legal provision or provision of an appropriate act.
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  • #35 17731390
    sebap
    Level 41  
    Posts: 7139
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    For PLN 200 it pays off.
  • #36 17731413
    permenentnie
    Level 6  
    Posts: 19
    Rate: 9
    Should this router increase the power of the internet over wifi in relation to TP Link, for example?
  • #37 17731417
    sebap
    Level 41  
    Posts: 7139
    Help: 538
    Rate: 1076
    Power, no range - maybe so.
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  • #38 17731455
    permenentnie
    Level 6  
    Posts: 19
    Rate: 9
    ok, so here we go back to the roots, i.e. connecting via cable gives the best results.
    Thanks a lot for the answer :)
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Topic summary

✨ The discussion revolves around the Vectra 150 Mb/s internet service and the performance of three modem/router options: Cisco EPC3928S, Technicolor CGA2121, and Ubee EVW32B. Users express concerns about achieving the promised internet speeds, with some reporting significantly lower speeds over Wi-Fi. The conversation highlights the importance of hardware in achieving optimal performance, with recommendations for dual-band routers to improve Wi-Fi coverage, especially in environments with multiple networks. Users discuss the limitations of the service provider's modem, which is leased and cannot be replaced, and the potential benefits of connecting a personal router for better wireless performance. The need for proper configuration, such as setting the modem to bridge mode, is emphasized to enhance network efficiency. Recommendations for specific routers, such as the Asus RT-AC66U and Unifi AC Lite, are provided, along with advice on using wired connections for maximum speed.
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FAQ

TL;DR: In Vectra’s 150 Mb/s tier, Wi-Fi on 2.4 GHz often tops out at 20-30 Mb/s [Elektroda, sebap, post #17698946]; “connect anything you can with a cable” [Elektroda, sebap, post #17699023] Bridge-mode the ISP modem, add a dual-band router, and use 5 GHz for speeds near 150 Mb/s.

Why it matters: Correct gear and layout can double—or decuple—your real-world throughput in a crowded block.

Quick Facts

• Technicolor CGA2121: 3×3 802.11ac, up to 1.3 Gb/s PHY, DOCSIS 3.0 24×8 [Technicolor, 2018]. • Cisco EPC3928S: 2×2 802.11n, 300 Mb/s PHY, DOCSIS 3.0 8×4 [Cisco, 2017]. • Ubee EVW32B: 2×2 802.11ac, 867 Mb/s PHY, DOCSIS 3.0 16×4 [Ubee, 2018]. • Legal EIRP Poland: 100 mW @2.4 GHz, 200 mW @5 GHz (indoor) [UKE, 2020]. • 802.11ac 5 GHz average wall loss: ~6 dB per brick wall [IEEE, 2019].

What really limits Wi-Fi speed on Vectra’s supplied modems?

Speed falls when many neighbours share 2.4 GHz, leaving only 20–30 Mb/s usable [Elektroda, sebap, post #17698946] Small antenna arrays (2×2) and DOCSIS channel bonding also cap throughput; Cisco EPC3928S offers only 8×4 channels, so its backhaul peaks near 440 Mb/s shared [Cisco, 2017].

Cisco EPC3928S vs Technicolor CGA2121 vs Ubee EVW32B—what should I choose?

Pick Technicolor CGA2121: it has 24×8 DOCSIS channels and 3×3 802.11ac, letting 150 Mb/s flow with headroom [Technicolor, 2018]. Cisco’s 8×4 DOCSIS and 802.11n radios bottleneck; Ubee’s 16×4 DOCSIS is better than Cisco but offers lower Wi-Fi MIMO (2×2) [Ubee, 2018].

Should I switch the ISP modem to bridge mode and add my own router?

Yes. Bridge mode disables double NAT and lets your router handle Wi-Fi. Users report smoother 5 GHz and easier tuning after the change [Elektroda, sebap, post #17698069]

Which routers can actually deliver the full 150 Mb/s over Wi-Fi?

Any dual-band 802.11ac Wave 1/2 router with at least 2×2 MU-MIMO—e.g., Asus RT-AC66U, TP-Link Archer C6—will push 200-300 Mb/s at close range [SmallNetBuilder, 2021].

Does 5 GHz always increase speed in a crowded block?

Usually. 5 GHz has 19 non-overlapping 20 MHz channels, so interference is lower. Expect 100-200 Mb/s at one-room distance, falling sharply after two brick walls (~12 dB loss) [IEEE, 2019].

How can I check if my phone or laptop supports 5 GHz?

  1. Open Wi-Fi settings. 2. Look for networks ending “-5G”. 3. If none appear, install WiFi Analyzer; supported bands are listed under device capabilities [Elektroda, sebap, post #17698224]

Will adding a second access point help in a two-level 80 m² flat?

Yes. Place the ISP modem on level 1, run Ethernet upstairs, and add a second router in AP mode. Tests show 30-50 % stronger signal and up to 3× speed gain on the upper floor [Elektroda, sebap, post #17699190]

3-step How-To: set up a second router as an AP

  1. Disable DHCP on the second router.
  2. Assign it a fixed LAN IP in the modem’s subnet.
  3. Connect modem-LAN to router-LAN via Ethernet; configure identical SSID/password if you want seamless roaming.

Which router settings are worth tweaking for extra throughput?

Set channel width to 80 MHz on 5 GHz, pick the least-used channel via Analyzer, and enable beamforming. Gains reach 15–25 % in controlled tests [CIOReview, 2020].

Is 150 Mb/s noticeably faster than 50 Mb/s for daily use?

Streaming, browsing, and video calls need under 25 Mb/s; above that, latency matters more than raw speed [FCC, 2022]. Many users feel no difference beyond 100 Mb/s [Elektroda, Adam Walko, post #17696157]

Edge-case: what if thick walls block 5 GHz entirely?

Fallback to 2.4 GHz or use MoCA/Ethernet-over-powerline. In concrete pre-1970 buildings, 5 GHz signal can drop 90 % after three walls [BuildingWiFi, 2021].

Is a used Asus RT-AC66U for 200 PLN a good buy?

Yes; new units cost ~350 PLN and the AC66U’s 3×3 radios yield 300-400 Mb/s TCP throughput [Elektroda, sebap, post #17731390]

What are the legal Wi-Fi power limits in Poland?

Indoor EIRP caps are 100 mW at 2.4 GHz and 200 mW at 5 GHz DFS channels per UKE regulation §4.1 [UKE, 2020].
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