<div class="gmail_quote">We recently installed this update, and found that half our customers would lose registration after about a minute. Packet capture shows that the phone sends the keep-alive packet (a SIP options packet), gets back a SIP 481 no subscription, then immediately loses registration. Turning off keep-alive fixes the problem. This is with Cisco/Linksys SPA phones, both older 9xx series and the newer 303 and 5xx series.<div>
<br></div></div><div><br></div>-- <br><div>Carlos Alvarez</div><div>TelEvolve</div><div>602-889-3003</div><div><br></div><br>