[網絡設備] MacBook Air ， 描述： poor reception

pllow

Could someone answer why the MacBok Air wireless received data by ADSL line better than FTTH (fiber to the home)
Many Thanks.

pllow

May be my question is not clear. I informed it again.
Previously we have the telco service provider give us 4 Mbps using ADSL broadband, the Macbook air use the line no problem.
Another telco provider give us 12 Mbps using fiber to the home (FTTH) with the same amount of monthly subscription. Then we use the FTTH internet telco provider.
After the installation of FTTH, the macbook air received and sent data or email become slow.
The macbook air we brought to other place to surf net and very good result. Then we ask the telco FTTH provider change the modem router but still the same matter happen.
Anyone can give any idea or solution.
Thanks you