from the images posted above it seems it supports adsl 2+ which meansyes, but the modem has got no specs available online or offline manual.
https://en.wikipedia.org/wiki/G.992.5The standard has a maximum theoretical download speed of 24 Mbit/s. Utilizing G.992.5 Annex M upload speeds of 3.3 Mbit/s can be achieved.
ADSL2+ extends the capability of basic ADSL by doubling the number of downstream channels. The data rates can be as high as 24 Mbit/s downstream and up to 1.4 Mbit/s upstream depending on the distance from the DSLAM to the customer's premises.
Ok. Let's see if this is feasible. I think the junction box is 3kms away (if that's possible) from my previous conversation with the local guys.Snr margin is quite low. Anything below 10 is unacceptable for stable connectivity.
I would say if u can change the cable from dp to your home then do it. Use utp cable as suggested by maxdemon. It will do wonder. Speaking from my personal experience .
Back in 2005 when BSNL launched bb. My exchange was around 6.5 kms away from my home. After installation. My line attenuation was 54 and snr margin was 5-6 db. I had constant disconnection. I changed the cable to cat 5 from my junction box to home and attenuation and snr came to 47 and 13 respectively. Result no line drops.
Junction box was nearby around 60 mtrs and I bought 65 mtrs cat 5 cable iirc. Same cat 5 cable is still working fine after 10 years.
Give it a shot. Cable is expensive but worth and peace of mind.