Does anybody has experience with the SIP phone of Alcatel the ST280. I can't make a call with this phone. Everytime I make a call I get the error Jun 12 19:38:38 WARNING[1133718080]: chan_sip.c:497 retrans_pkt: Maximum retries exceeded on call 5624 at 81.124.191.47 for seqno 1 (Response)