qsig This topic has 0 replies, 1 voice, and was last updated 24 years, 2 months ago by adnan masood. Viewing 1 post (of 1 total) Author Posts 28th September 2000 at 12:17 #33064 adnan masoodGuest hello can any one please answer the following quries what is the difference between qsig bc, qsig gf, ?? what is supplementary services? and what is pss1. is it another name of qsig Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.