Voice Quality Troubleshotting MVP210 This topic has 0 replies, 1 voice, and was last updated 20 years, 9 months ago by Manish. Viewing 1 post (of 1 total) Author Posts 5th May 2004 at 21:34 #27126 ManishGuest Voice quality drops when call is made on PSTN lines. I am using MVP210 from multitech. Voice quality degrades further when call made on cell phone. Any answers !!!! Author Posts Viewing 1 post (of 1 total) The forum ‘Voice over IP’ is closed to new topics and replies.