gsm This topic has 2 replies, 1 voice, and was last updated 9 years, 7 months ago by Jason. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts 29th May 2011 at 17:57 #66497 Reply abdullahGuest plzzz anybody till me why we use -48, -24,-12 voltage in gsm..and what is different between them? 1st June 2011 at 21:05 #66498 Reply MilonGuest GSM channels 3rd June 2011 at 11:35 #66499 Reply JasonGuest I thought that the old land line equipment used this and it was a carry over from those days. `Jason Author Posts Viewing 3 posts - 1 through 3 (of 3 total) Reply To: gsm Your information: Name (required): Mail (will not be published) (required): You may use these 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