Hey there banzaiUK, my wife is from Laguna (Biñan).
Phone lines here are in a nut shell of very poor quality and believe it or not contain wire splices at frequent intervals. Not to mention non-water tight connection/switch boxes some even missing covers. At least that describes the conditions here in my neck of the woods. They are upgrading and replacing older cable runs unfortunately for me, not in my barangay.
I should try to get some OJT here in the US and try to make a career of a Cable Guy. Then migrate there and make the Phil's my home
A lot of Philippine traffic goes through Taiwan. Back in Dec of 2006 a quake in Taiwan damaged nine undersea cables between Taiwan and Luzon. This parallelized Internet traffic in the Philippines. It was days before we got service back.
I remember when that happened. I spent hours on the phone with Vonage trying to figure out why it would take almost 1 minute before the call would go through and the phone would ring over there in the Philippines. That had to be the longest 2 weeks of poor call quality. It was almost impossible to call the in-laws during Christmas (Pasko) and the New Years