Hi. Again one big mysterious problem I hope some good guy can help me solve. I'm trying to connect some Siemens C450 SIP IP Dect phones to asterisk (1.2.13) (I have actually 3 handsets + 3 ip base). After configuring them and rebooting, all of them register properly on asterisk, then, after the first call, they appear no more registered as registered in asterisk, and on the handset the display shows "SIP registration failed". Has anyone got the same problem? Has anyone ever tried to operate more than one C450IP in the same open space? fyi: - there are no lan/ethernet problems - I've tried with different "qualify" values (0, 2000, 5000) - no nat involved - everything is running on a private lan - phones reply to ping even when qualify times out - any other sip phone (wired to the lan) works just fine It looks like the rise of the machine... every new phone I try drives me crazy. -- -- Alberto Pastore B-Press Srl - Gruppo MSoft P.IVA 01697420030 P.le Lombardia, 4 - 28100 Novara - Italy Tel. 0321-499508 Fax 0321-492974 http://www.msoft.it