The alarm was probably installed before broadband was a big thing. So doing it this way wasn't an issue.
Nowadays obviously it's a big problem. This kind of thing affects so many people. Modern burglar alarms now use the mobile network so don't even connect to a landline. They just have a sim card inserted. This way when a burglar cuts a landline it makes no difference.
Edited by ukhardy07 (Wed 22-Aug-12 01:29:17)