| Mirial Softphone | MCS | ClearSea | |
| Product Features | |||
| Architecture | |||
| Standalone Client |  |
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| Client-Server Solution | |
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| Licensing | |||
| Per seat licensing | |
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| Per account licensing | |
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| Per port licensing | |
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| Target | |||
| Small Enterprises | |
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| Small/medium/large enterprises, educational institutions, healthcare | |
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| Service providers, Carriers | |
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| Client-specific features* | |||
| Operating System Support | |||
| Android | |
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| iOS | |
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| Windows | |
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| Mac OS X | |
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| Telephony Features | |||
| SIP | |
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| H.323 | |
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| H.239 | |
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| VideoSharing | |
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| 2 independent lines | |
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| Call Transfer | |
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| 3-party continuous presence multiconference without external equipment | |
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| Far End Camera Control (H.224 + H.281) | |
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| Local Address Book | |
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| Server Side Address Book | |
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| Media Features - Video | |||
| H.261/H.263,H.263+/H.264 | |
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| 1080p/720p/4CIF/CIF/QCIF resolutions | |
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| HD 720p encoding + decoding | |
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| Full-HD 1080p encoding + decoding | |
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| Embedded transcoding MCU capabilities | |
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| SIP encryption | |
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| H.323 encryption | coming soon | coming soon | coming soon |
| Call recording, playback and export in Windows Media Video (WMV) or QuickTime (MOV) format, including H.239/presentation | |
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| Framerate: up to 30fps | |
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| Automatic "quality vs. CPU load" dynamic adjustment | |
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| In-band dynamic video format changes | |
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| Support for standard webcams | |
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| Support for High-Definition webcams and HDMI capture boards at resolutions up to 1920x1080 | |
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| Support for PAL/NTSC DV cameras over Firewire IEEE-1394 (on Windows XP or better only) | |
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| Media Features - Audio | |||
| G.711 μ-law, A-law | |
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| G.722.1 Annex-C (Polycom® Siren14™) | |
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| Full duplex Acoustic Echo Canceller | |
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| Full duplex Audio Denoise Filter | |
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| VAD | |
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| Send in-band or out-of-band DTMF | |
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| Network | |||
| Automatic bandwidth control, adaptive to actual network condition | |
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| Support asymmetric input/output bandwidths (e.g. ADSL) | |
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| Configurable port ranges for signaling and media protocols | |
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| Static NAT support | |
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| Systems with multiple IP are supported | |
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| Configurable DIFFSERV code | |
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| Branding | |||
| Multiple language support | |
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| Customer Logo in GUI | |
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| Fully customizable GUI | |
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| Server-specific Features | |||
| Form Factory | |||
| Physical Appliance | does not apply | |
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| Virtual Appliance (VMware) | does not apply | |
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| Telephony Features | |||
| SIP | does not apply | |
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| H.323 | does not apply | |
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| Endpoint Agnostic | does not apply | |
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| H.239 data collaboration | does not apply | |
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| Acts as Session Border Controller | does not apply | |
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| User Groups management | does not apply | |
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| Centralized Contacts Directory | does not apply | |
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| 1080p/720p/4CIF/CIF/QCIF resolutions; up to 2Mbps | does not apply | |
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| H.224 (FECC) | does not apply | |
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| Advanced Call Routing Engine | does not apply | |
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| LDAP integration | does not apply | |
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| H.323/SIP endpoint autodiscovery on local LAN | does not apply | |
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| Embedded Video IVR for dialing extensions | does not apply | |
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* some features may not be available on Android or iOS. For more information please refer to each product's datasheet.