Upgrading Asterisk to Work with Snom MWI Since Snom’s are multiline phones, the NOTIFY message needs to tell the phone which “line” to turn MWI off for. A sample heading on a good notify is: "NOTIFY sip:dephone@xx.xx.xx.xx;line=34n34jed SIP/2.0" The Production version of Asterisk leaves the “line=” out. Upgrade to the development version of chan_sip2 which can be found at: http://bugs.digium.com/bug_view_page.php?bug_id=0000759 © ABP International, Inc - 05/05/2004 All information in FAQ supplied as best effort only. ABP does no guarrantee suitability of products or provide any guarantees or warranties on our vendors produtcs.