https://community.cisco.com/t5/ip-telephony-and-phones/cisco-phones-7821-problem-with-transfer-call-sip/m-p/4065613#M388095 <P>Hi everyone!</P><P>I have an Alcatel OmiPCX Office and some Cisco 7821 phones. Following this guide&nbsp;<A href="http://usecallmanager.nz/sepmac-cnf-xml.html" target="_self">http://usecallmanager.nz/sepmac-cnf-xml.html</A>&nbsp;and this forum I've registered my phones.</P><P>Calls and direct tranfer works fine, but when I tranfer a call from A to B (warm transfer), after B confirm, I press again transfer and it works but <STRONG>A phone</STRONG> freeze and it doesn't release the call.</P><P>&nbsp;</P><P><SPAN>I have to restart it otherwise it won't unlock.</SPAN></P><P>&nbsp;</P><P><SPAN>I've analyze SIP dump and in the last case <STRONG>A</STRONG> doesn't receive <STRONG>REFER</STRONG></SPAN></P><P>&nbsp;</P><P>&nbsp;</P> Tue, 14 Apr 2020 16:19:59 GMT DennyVavala 2020-04-14T16:19:59Z https://community.cisco.com/t5/ip-telephony-and-phones/cisco-phones-7821-problem-with-transfer-call-sip/m-p/4065613#M388095 <P>Hi everyone!</P><P>I have an Alcatel OmiPCX Office and some Cisco 7821 phones. Following this guide&nbsp;<A href="http://usecallmanager.nz/sepmac-cnf-xml.html" target="_self">http://usecallmanager.nz/sepmac-cnf-xml.html</A>&nbsp;and this forum I've registered my phones.</P><P>Calls and direct tranfer works fine, but when I tranfer a call from A to B (warm transfer), after B confirm, I press again transfer and it works but <STRONG>A phone</STRONG> freeze and it doesn't release the call.</P><P>&nbsp;</P><P><SPAN>I have to restart it otherwise it won't unlock.</SPAN></P><P>&nbsp;</P><P><SPAN>I've analyze SIP dump and in the last case <STRONG>A</STRONG> doesn't receive <STRONG>REFER</STRONG></SPAN></P><P>&nbsp;</P><P>&nbsp;</P> Tue, 14 Apr 2020 16:19:59 GMT https://community.cisco.com/t5/ip-telephony-and-phones/cisco-phones-7821-problem-with-transfer-call-sip/m-p/4065613#M388095 DennyVavala 2020-04-14T16:19:59Z