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Forum Discussion
RS700S — Wi-Fi upload capped at ~400 Mbps in router mode only (hardware acceleration / ONT issue)
Here's the summary for the online support form in English, with the current ~400 Mbps figure: Subject: RS700S — Wi-Fi upload capped at ~400 Mbps in router mode only (hardware acceleration / ONT issu...
this is not a WLAN but a routing issue.... with customer support we tried to connect to the individual bands with Smart Connect disabled. Still the same.
The same problem also with my sons iphone and from my partners computer......
(1)- Asus Router connected to Zyxel ONT... no problem
(2)- RS700S as AP, no problem, same WIFI settings, full speed
(3)- RS700S as Router connected to the Zyxel ONT, upload is limited
(4)- RS700S as Router connected to the Zyxel ONT, computer connected with LAN to RS700S, full speed over LAN
So, (1) proves, the WAN connection is working with full speed with another router with Zyxel PM7300 ONT
(2) proves RS700S WIFI works with full speed always in AP mode (routing disabled)
(3) reproduces the problem, slow upload in Routing over WIFI
(4) shows, the slow routing is only affected over WIFI
This cannot be anything but a firmware problem, i ran this with other analytics and everything points to that.
Don't disagree with your complete evaluation.
(1) proves, the WAN connection is working with full speed with another router with Zyxel PM7300 ONT
Just on minor detail, probably not related: This other router looks like a classic 1 GbE router 8-)
Several kind similar issues in the community, from just 90 Mbps upload to some 350 Mbps upload "performance". Let's try to bring in BH_C into the loop.
Around end of March 2026, BH_C talked of a Beta firmware supposedly addressing the slow upload speed ... here - hard to say if this made it to the version released these days.