【實用生產應用app】Dial91 VoIP|最夯免費app-綠色工廠好玩App

This App is made exclusively for serious Dial91 users that make frequent calls and demand the best quality VoIP app.You must make at least one call per month to keep this app in active status.In case your app is deactivated due to non-use, you can contact Dial91 Support any time to reactivate it.The Dial91 iPhone Edition is an award-winning, SIP-based softphone for the iPhone and iPod touch and allows you to make and receive voice calls over a Wi-Fi or 3G connection via an easy-to use and intuitive interface.Dial91 iPhone Edition includes premium G.729 low bandwidth audio codec. Dial91 App Features • iOS 4.0+ Background Support • Three-Way Conference Calling • Low bandwidth audio codec G.729 included • Call display and voicemail indicator • Speakerphone, mute and hold • Call history – list of received, missed and dialed calls • Contact List and Contact Favorites - leveraging the iPhone Contacts • Ringtones and contact avatars • Custom wallpaper • Multiple call support - swap between two active calls; merge and split calls; transfer calls • Call recording • Call forwarding • Dial plan support • Support for DTMF: the ability to enter numbers to use an auto attendant via RFC 2833, SIP INFO and in-band • VPN Support • High resolution images for iPhone 4 and 4S Advanced Features • Network Traversal - Application Managed, Server Managed or User Specified; Global IP Support; STUN & ICE • Media Efficiency and Quality - Noise Reduction, Echo Cancellation, and VAD (Voice Activity Detection) • QoS (Quality of Service) - ToS Marking and DSCP (Differentiated Services Code Point) • Security and Encryption via TLS and SRTP • DNS SRV record lookups • Call quality statistics Accessories The following accessories are supported: • Headset with microphone (including Bluetooth): Dial91 uses the ear-piece and microphone on the headset. • Headphones (no microphone): Dial91 uses the ear-piece on the headphone and the built-in microphone on the iPhone.