Castel SIP vs VoxCon

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.

VoxCon is a FREE softphone application which allows users to make and receive voice/video calls and Instant Messages through OpenVox IPPBX system or other SIP servers via either cellular data or WiFi from anywhere in the world. Key Features & Technical Specifications: • SIP-based softphone • VoxCon facilitates easy and effective communication management with an intuitive interface which accommodates multiple calls. • Can be used over cellular data connection or WiFi • Call functionality includes the ability to switch between two calls, merge and split calls and perform attended and unattended transfers. • It incorporates advanced security settings which allows for secure call signaling and audio encryption. • Supports up to 1080P video call with H.264 and VP8 codec, and supports HD audio call. • Codecs offered includes: G.279, G.711a/u, Opus, AMR, AMR-WB, G.722.1, iLBC, GSM, SPEEX-WB. • Powerful NAT traversal options including automatic NAT discovery, STUN and UPnP • Users can view info of Incoming & Outgoing calls and missed calls in call history