@SuhelNo option. You have to change the cable from junction box to your modem. Your attenuation is low. So your line has ample scope for improvement.I have learnt the hard way. The older modems of Baba Hazam era cannot handle Annex M modulation. So mere switching to current gen modems like TP-Link TD8817 or D-Link 2520U can make the connection more stable.