VoIP calls take time to end This topic has 0 replies, 1 voice, and was last updated 21 years, 9 months ago by Sam. Viewing 1 post (of 1 total) Author Posts 29th April 2003 at 18:06 #24262 SamGuest Hi everybody ! I’m confronted with a problem with my CISCO 3640 (IOS 12.2(13)) when making VoIP call with it. After hanging up the telephone handset the router takes at least 2 minutes before interrupting the call. Please advise. Author Posts Viewing 1 post (of 1 total) The forum ‘Voice over IP’ is closed to new topics and replies.