02-10-2015, 06:38 PM
You certainly need a cap. Make sure it is a Y-cap, as the voltage on a phone line can be 110V even though it is decoupled via a transformer, but then as usual you want to be sure that if it fails you are safe.
Some sort of a surge protection would not hurt, although I think phone lines use something like maybe gas discharge tubes arrestors.
Some sort of a surge protection would not hurt, although I think phone lines use something like maybe gas discharge tubes arrestors.