Iphone VOIP SIP softphone

Creation of a softfone SIP VOIP Iphone application, features needed: •Full SIP Compliance - enabling use of any SIP-compliant server •Single Account Support. •Pre-defined locked single VoIP Provider (locked to our server) •Multitasking capabilities – for use with the Apple iOS 4.1 operating system on the following supported devices: iPhone 4S, iPhone 4, iPhone 3GS, and the third-generation iPod touch (32GB and 64GB models from late 2009) •Call display, destination per minute cost display (once send clicked) , real time cost display (when call connected) •Speakerphone, Mute and Hold •Call history – list of received, missed and dialed calls (with call cost) •Call recording •Contact List and Contact Favorites – leveraging the iPhone Contacts •Audio codecs include G.711, G.722, G.729, iLBC, GSM and SILK •Support for DTMF: the ability to enter numbers to use an auto attendant Via RFC 2833, SIP INFO and Inband •VPN Support •Language: English •Network traversal o Application Managed, Server Managed or User Specified o Global IP Support o STUN & ICE • Media Efficiency and Quality o Noise Reduction o VAD (Voice Activation Detection) • QoS (Quality of Service) o ToS Marking o DSCP (Differentiated Services Code Point) • Security and Encryption o TLS and SRTP (Secure call signaling and audio encryption) • DNS SRV record lookups • In-App Purchases: connects to our server to get offers