Hi . Edit your gkdefault.cfg in notepad upgradecode:3,0x601,0x0400,0x0100,192.168.10.250,0x060817A, 0x070409a,CP7912080003SCCP070409A.binThen upload the new gkdefault.cfg in flash .Mount CP7912080003SCCP070409A.bin in TFTP .Restart telephony system R...

Hi Orlando . I have the same problem like you . You must stop udp:5060 and tcp:5060 whit ACL or : Router(config)#sip-uaRouter(config-sip-ua)#no transport udpRouter(config-sip-ua)#no transport tcpRouter(config-sip-ua)#endfor more info : http://www.cis...