<h3>Description</h3>
<p>Yealink phones is subscribes using <code>application/dialog-info+xml</code>. In this case for many phones false reported <code>early</code> state.</p>
<h3>Troubleshooting</h3>
<h4>Reproduction</h4>
<p>Not knows. Some phones is displayes properly, some is not.</p>
<h4>Debugging Data</h4>
<p>none</p>
<h4>Log Messages</h4>
<p>not yet done</p>
<h4>SIP Traffic</h4>
<p>In provided pcap. is subscribed two clients <code>yealink</code> phone and <code>x-lite</code> softphone.<br>
Created call to extension 201 (sip login). For <code>x-lite</code> status is changed properly for <code>yealink</code> is not.<br>
Filters<br>
<code>udp.port==13322</code> caller leg<br>
<code>udp.port==1025</code> callee legs<br>
<code>udp.srcport==5060&&udp.dstport==5060</code> yealink phone<br>
<code>udp.port==15502</code> xlite</p>
<p><a href="https://github.com/kamailio/kamailio/files/1849284/blf-test.pcap.gz">blf-test.pcap.gz</a></p>
<p>packet 14 - kamailio reports 201 extension is Available to xlite<br>
packet 25 - kamailio reports 201 is early to yealink (unexpected)<br>
packet 108 - created call to 201 extension<br>
packer 109 - ringing to caller<br>
packet 118 - kamailio send ringing to caller<br>
packet 119 - INVITE send to callee<br>
packet 124 - callee send Trying<br>
packet 127 - kamailio reports 201 is ringing to yalink<br>
packet 129 - kamailio reports 201 is busy to xlite<br>
packet 145 - kamailio send session progress to caller<br>
packet 146 - callee send ringing<br>
packet 154 - caller send cancel<br>
packet 156 - kamailio send early to yealink (unexpected)<br>
packet 156 - kamailio send Available to x-lite</p>
<h3>Possible Solutions</h3>
<p>not known</p>
<h3>Additional Information</h3>
<p>Kamailio installed from kazoo team repo</p>
<pre><code>[root@kamailio01 ~]# kamailio -V
version: kamailio 5.0.3 (x86_64/linux) 
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown 
compiled on 11:07:05 Sep 23 2017 with gcc 4.8.5
[root@kamailio01 ~]# 
</code></pre>
<ul>
<li><strong>Operating System</strong>:</li>
</ul>

<pre><code>[root@kamailio01 ~]# uname -a
Linux kamailio01.cloudpbx.ai.co.uk 3.10.0-514.6.1.el7.x86_64 #1 SMP Wed Jan 18 13:06:36 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@kamailio01 ~]# cat /etc/redhat-release 
CentOS Linux release 7.3.1611 (Core) 
[root@kamailio01 ~]# 
</code></pre>

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