I am CCIE Voice/Collaboration Expert with more than 20+ years of experience. I have extensive knowledge in: CUCM CUCXN CUPS or IM&P Jabber Expressway Integration between Cisco and Microsoft Lync Integration between Cisco Phone and non Cisco PBX 3rd party vendor phone registering with Cisco ISDN PRI Gateways Analog Gateway Dial-plan Design TLS and Secure RTP using Certificate TDOS Attack prevention Secure Telephony UCS Server and VMWARE with UC Extensive Knowledge in SIP, H323 suit protocols, and MGCP Protocols