Siemens Gigaset C450 IP

I’ve had my C450 IP for one month now. Pretty happy with it, good range (at least better than Panasonic and my old Gigaset A-series), stable SIP connection (after firmware upgrade), reasonable battery life. Works with Asterisk (except the R-key to hold/transfer VoIP calls, but you can set the key in features.conf; and MWI).