Which of the following protocols does Cisco Unified Personal Communicator use to connect to UCM in softphone mode?
- IMAP over SSL
- IMAP over TLS
Cisco Unified Personal Communicator uses Session Initiation Protocol (SIP) to connect to Cisco Unified Communications Manager (UCM) in softphone mode. SIP is a call signaling protocol that is used by UCM to communicate with collaboration endpoints, such as Unified Personal Communicator and Cisco Jabber. Unified Personal Communicator is software that enables a user to connect to several different communication services from a single application. For example, you can use Unified Personal Communicator to place phone calls, download voice mails, and instant message (IM) another user.
SIP is an Internet Engineering Task Force (IETF)standard call signaling protocol. Although SIP is typically used as a peer-to-peer call signaling protocol, it can also operate in client/server mode. A softphone is software that behaves like a phone, enabling a user to have voice conversations over a typical workstation network connection. Softphone mode is an operational mode that Unified Personal Communicator uses to act as a softphone.
Unified Personal Communicator does not use Extensible Messaging and Presence Protocol (XMPP) to connect to UCM in softphone mode. XMPP is an open Extensible Markup Language (XML) IM and presence protocol. Unified Personal Communicator uses XMPP to establish IM sessions with Cisco Unified Presence (CUPS). CUPS is server software that centralizes network traffic from several different communications services so that it can all be transmitted over the same Cisco Voice over IP (VoIP) network. CUPS also uses XMPP to communicate with IM clients? it uses SIP and SIP for Instant Messaging and Presence Leveraging Extensions (SIMPLE) to integrate with third-party clients and applications.
Cisco Jabber, which also uses SIP and XMPP, is an application that is intended to integrate CUPS server services, such as user availability, with Microsoft Office. Cisco Jabber is also an IM client, a voice and video call client, and a desktop sharing client.
Unified Personal Communicator does not use Cisco Unified Communications Manager IP Phone (CCMCIP) service to connect to UCM in softphone mode. CCMCIP is used in desk phone mode. The difference between softphone mode and desk phone mode is that Unified Personal Communicator uses a physical IP phone as a proxy for voice conversations in desk phone mode. In softphone mode, Unified Personal Communicator handles the voice conversations itself.
Unified Personal Communicator does not use Secure Hypertext Transfer Protocol (HTTPS) to connect to UCM in softphone mode. Unified Personal Communicator uses HTTPS to establish encrypted connections to a conferencing server. In addition, Hypertext Transfer Protocol (HTTP) can be used to connect to a conferencing server without encryption.
Unified Personal Communicator does not use Internet Message Access Protocol (IMAP), IMAP over Secure Sockets Layer (SSL), or IMAP over Transport Layer Security (TLS) to connect to UCM in softphone mode. Unified Personal Communicator uses IMAP to communicate with a voice mail server. IMAP over SSL is used to encrypt communications between Unified Personal Communicator and the voice mail server. IMAP over TLS is used to encrypt voice mail transmissions specifically between Unified Personal Communicator and Cisco Unity Connection.