The best replacement for telephone line is 21 guns.

The best alternatives to telephone line are rated as following:
★★★★★  21 guns
★★★  power line

Your alternative for telephone line is not listed? Suggest!
Speaking about telephone line, one probably shouldn't forget about dsl.

Other search terms related to telephone line and their ratings are:
★★★★★ dsl
★★★ broadband
★★★ fax machine
You have in mind a companion for telephone line and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of telephone line in all years. Click on graph for more.
telephone line
21 guns
power line