<span class="gmail_quote"></span>Base information:<br><p><strong></strong>Cisco Call Manager Express 4.2<br>Integrated Services Router 2851 (revision 53.51)<br>IOS Version 12.4(11)XW2<br>VLAN 1: Daten VLAN 2: VoIP<br>Phones in use: 7940,7941,7960,7970,7921</p>
<p><strong><u>Description of the problem:<br></u></strong>In CME ephones change there state to DECEASED after a while without without a recognizable cause.</p>
<p>In this state the concerned phones repeat the following procedure again and again:<br>- configuring IP<br>- configure CM-list<br>- opening <ip-cme> 6-10 sec <br>- configuring IP<br>- configure CM-list<br>- opening .......... and so on</p>
<p>In this state the phones get there IP information per DHCP correctly (IP,SM,GW,TFTP,CME)<br>A restart of the phone doesnīt bring it back alive.<br>Unplug power for a while and plug again brings us to the procedure above.<br>
A restart of all phones using telephony-services "restart all" takes all phones to state unregistered and descripted procedure<br>Deleting a concerned ephone and create new doesnīt change anything<br>The only way to geht the phones back in registering procedure is to restart the router. What causes the unregistration of all phones - bad in working hours</p>
<p>After restart all phones register fast and correct. Strange to say but up to one hour (waited at customer site for about one hour testing phase) after restart phones register absolutly normal when unplug from power.</p>
<p>Next morning....some phones are in state DECEASED again. If I now take a phone from power and plug it again...the procedure above starts.<br>Only way to geht the DECEASED phones back for work is....restart the CME-Router.</p>
<p>What else tried:<br>Already said: restart, unplug power, restart all, delete and re-create ephone</p>
<p>- changed the DHCP Option 150 and ip source address back from <a href="http://172.20.221.199" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">172.20.221.199</a> to <a href="http://192.168.100.1" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.100.1</a><br>
(we had changed this out of the 192er VoIP-Subnet because of the registration over WAN with IP Communicator for example...worked fine)<br>
--> no results, same behaviour</p>
<p>- ckecked for error messages using debug dhcp, debug ephone register, debug tftp events ...... but all is normal. In descripted error procedure no messages appear.</p>
<p>- checked the show ephone output. All phones with state deceased have "TCP socket:[-1]", donīt really know what this could mean</p>
<p>- changed the keepalive in telephony-service from 30 to 3000<br> --> the same behavior after weekend. First phone goes deceased after 11 keepalive, next after 26 keepalive counters, next after 55 and so on.</p>
<p><br>What else can I try? What else couls be the reason that the phones go deceased?<br>Maybe hardware failure?<br>There was an power loss two days before failure occurs for the first time.</p>