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SIP
The Session Initiation Protocol (SIP) and its associated family of technologies provide the basis for a wide range of services for mobile handsets.
This lightweight, transport independent protocol provides the signalling for the start of a communication session it is typically the Real-time Transport Protocol that handles the actual carrying of the content. SIP is used in many capabilities such as VoIP, Instant Messaging and Presence.
The following section highlights some of EMCC’s experience relating to SIP.
Motorola
Push-To-Talk (PTT) is a half-duplex solution allowing the carriage of voice in one direction over an IP network to provide a “walkie-talkie” service for handsets. PTT provides services such as Push-To-X where the end contact is not a person but may be a service such as speech-to-text, push-to-email or a Dictaphone. EMCC has been involved in the development of Motorola’s PTT solutions, creating two versions, one written to be compatible with Motorola’s proprietary systems and another based on Open Mobile Association (OMA) Push-over-Cellular (PoC) standards. These extensive projects included the implementation of a SIP stack to handle session creation for the PTT solution. Other functionality such as Presence information and Push-To-View were implemented as part of the overall package. Push-To-View enables instant delivery of images and is often used during a PTT conversation.
To find out more about EMCC’s SIP experience please contact technology@emccsoft.com
