SessionTalk SIP Softphone vs Castel SIP

Your business number. Your iPhone. Your way to stay in touch. SessionTalk SIP Softphone brings your compatible SIP account to iPhone and iPad, with a clear dialler, quick access to contacts and calling tools for working from anywhere. Start with SIP voice calling. Unlock the optional one-time Business upgrade for push notifications, video calling, messaging and XMPP, presence, multiple SIP accounts, call transfers, conference merging, call recording and ZRTP audio encryption. The messaging screenshots show features available with this upgrade. CALL WITH CONFIDENCE • Make and receive SIP calls over Wi-Fi and mobile data. • Find people quickly with contacts, favourites and call history. • Use Bluetooth, speakerphone, mute, hold and voicemail notifications. • Enjoy clear audio with Opus, G.722 and G.711 support. MORE WAYS TO KEEP IN TOUCH • Share messages with XMPP chat and compatible SIP messaging services. • Keep conversations organised with contact avatars and group chat rooms. • Share images and files in supported messaging conversations. • Stay reachable with incoming-call push notifications and background XMPP message delivery. TOOLS FOR YOUR WORKDAY • Manage multiple SIP accounts in one app. • Transfer calls, bring people together in conferences and record calls. • Use video calling with a compatible provider. • Support for TLS and SRTP when enabled by your service. • ZRTP audio encryption requires the Business upgrade. Purchase or restore it in Premium Features. • Compare the on-screen security code with the other caller to verify a ZRTP call. • See your call encryption type and ZRTP verification status during calls. • ZRTP requires a compatible peer and media path and supports audio only. Video is unavailable while ZRTP is enabled. BRING YOUR OWN SERVICE SessionTalk is a softphone, not a phone service. A compatible SIP account or PBX is required for calling. XMPP messaging requires a compatible XMPP account. SIP messaging, video, push and other features depend on your provider and configuration. Provider calling charges and mobile data charges may apply. Need help? Contact support@sessiontalk.co.uk.

Castel SIP App is a SIP intercom softphone. The easy-to-use and intuitive application, allows you to make and receive audio and video calls from IP intercom stations (XELLIP, CAPIP...) on your iPhone or iPad. With Castel SIP App, you can communicate and open the door, anywhere. It works with the Castel Cloud SIP server through Wi-Fi and 3G/4G/5G. Main features: - Audio and video calls with advanced functionalities (Loudspeaker, transfer calls, hold...) - Address book with favorites - Call history - Remote commands during calls and DTMF - Support landscape and portrait mode for all smartphone and tablet designs (camera notch...) Note: Please, check your cellular operator's terms of agreement to make sure they allow SIP calls on their network before using Castel SIP App.