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Please see the link from Microsoft below, it describes how to configure appropriate security via TLS<br />
<br />
<a href="http://go.microsoft.com/fwlink/p/?LinkId=221459" rel="ugc">http://go.microsoft.com/fwlink/p/?LinkId=221459</a>
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Please see the link from Microsoft below, it describes how to configure appropriate security via TLS

http://go.microsoft.com/fwlink/p/?LinkId=221459 [http://go.microsoft.com/fwlink/p/?LinkId=221459]

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Page 22<br />
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Set SIP Trunk Security Profile Information<br />
In the SIP Trunk Security Profile Information section, specify the following settings as shown in figure 15: <br />
• &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set Device Security Mode to Encrypted. This ensures that CUCM uses TLS to communicate with the Mediation Server. <br />
• &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set Incoming Transport Type to TLS.<br />
• &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set Outgoing Transport Type to TLS.<br />
• &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set Incoming Port to 5061.
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Page 22

Set SIP Trunk Security Profile Information
In the SIP Trunk Security Profile Information section, specify the following settings as shown in figure 15:
•      Set Device Security Mode to Encrypted. This ensures that CUCM uses TLS to communicate with the Mediation Server.
•      Set Incoming Transport Type to TLS.
•      Set Outgoing Transport Type to TLS.
•      Set Incoming Port to 5061.

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thanks, but what i do in Lync side?
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This dodo keeps asking stupid questions and never marks an answer as an accepted solution. Please do not waste your time on him.
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This dodo keeps asking stupid questions and never marks an answer as an accepted solution. Please do not waste your time on him.

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Dear All,<br />
<br />
I need to create a new TLS trunk between Lync 2013 and Cisco Call Manager, i would like to ask about the requirements, usually when i do TCP trunk, nothing required, only the same port in Lync and Call Manager, but using TLS is it the same? <br />
<br />
Please Help
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Dear All,

I need to create a new TLS trunk between Lync 2013 and Cisco Call Manager, i would like to ask about the requirements, usually when i do TCP trunk, nothing required, only the same port in Lync and Call Manager, but using TLS is it the same? 

Please Help

what's required to create encrypted trunk with Cisco call manager

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

Instant messaging (IM) is a type of online chat that offers real-time text transmission over the Internet. A LAN messenger operates in a similar way over a local area network. More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat. Non-IM types of chat include multicast transmission, usually referred to as "chat rooms". Depending on the IM protocol, the technical architecture can be peer-to-peer (direct point-to-point transmission) or client-server (a central server retransmits messages from the sender to the communication device).

Chat / IM

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.