<div dir="ltr">Hello,<div><br></div><div>I use Opensips 2.3 in follow scheme:</div><div><br></div><div>SBC -------Opensips ------Zoiper</div><div><br></div><div>When Opensips Send BYE to SBC, SBC not return 200 OK.<br><br>Zoiper send BYE to Opensips. </div><div><br></div><div><div>    BYE sip:Opensips_IP:Opensips_port;did=363.27c9faa4 SIP/2.0</div><div>    Via: SIP/2.0/UDP Zoiper_IP:32346;branch=z9hG4bK-524287-1---fed42b1d179cd7b0;rport</div><div>    Max-Forwards: 70</div><div>    Contact: <sip:555222@Zoiper_IP:32346;transport=UDP></div><div>    To: <sip:555300@SBC_IP;user=phone>;tag=ff435000ff02ff10ff00000c2916ffff</div><div>    From: <sip:555222@Opensips_IP:Opensips_port;user=phone>;tag=fc281b10</div><div>    Call-ID: <a href="mailto:90425000ee02e5108000000c2916c1ef@sbc.site.com">90425000ee02e5108000000c2916c1ef@sbc.site.com</a></div><div>    CSeq: 2 BYE</div><div>    User-Agent: Z 5.1.7 rv2.8.51</div><div>    Content-Length: 0</div></div><div><br></div><div>Opensips send BYE to SBC.</div><div><br></div><div><div>    BYE sip:555300@SBC_IP;user=phone SIP/2.0</div><div>    Via: SIP/2.0/UDP Opensips_IP:Opensips_port;branch=z9hG4bK7931.161e4d25.0</div><div>    Max-Forwards: 69</div><div>    Contact: <sip:Opensips_IP:Opensips_port;did=363.27c9faa4></div><div>    To: <sip:555300@SBC_IP;user=phone>;tag=ff435000ff02ff10ff00000c2916ffff</div><div>    From: <sip:555222@Opensips_IP:Opensips_port;user=phone>;tag=fc281b10</div><div>    Call-ID: <a href="mailto:90425000ee02e5108000000c2916c1ef@sbc.site.com">90425000ee02e5108000000c2916c1ef@sbc.site.com</a></div><div>    CSeq: 2 BYE</div><div>    User-Agent: Z 5.1.7 rv2.8.51</div><div>    Content-Length: 0</div><div><br></div>SBC have not return 200 OK.</div><div><br></div><div>How to setup Opensips to improve this problem?</div><div><br></div><div>Best regards,</div><div>Dragomir</div><div> </div></div>