May deadline yan fiberization, den kung matigas ka pipitikin ung linya mo then sabihin unrestorable due to legacy equipment end of life ng equipment. You got no choice but to upgrade. Same sa 2G and 3G eventually aalisin na yan, clear indication is voice now being switched from circuit to packet, we have voice over wifi and LTE.

Kung may malambot na pede daanan doon idadaan ang linya para less drilling not unless meron entrance conduit at pull-box ang bahay, ang iniiwasan lang sa fiber yung kink/bends.