Why -48V is used as power for telecom? This topic has 16 replies, 1 voice, and was last updated 3 years, 6 months ago by osama. Viewing 2 posts - 16 through 17 (of 17 total) ← 1 2 Author Posts 20th October 2018 at 05:36 #37770 Reply Arham AshaqGuest i want to know that why we only prefer -48 volts in telecommunication devices 6th December 2018 at 08:05 #37771 Reply osamaGuest Why -48V is used as power for telecom Author Posts Viewing 2 posts - 16 through 17 (of 17 total) ← 1 2 Reply To: Why -48V is used as power for telecom? Your information: Name (required): Mail (will not be published) (required): You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes: <a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width=""> Submit