ATEl Communicator - Better Than Skype

Call Features

  • Audio calls
  • Video Calls
  • Desktop streaming
  • Desktop Sharing
  • Audio conference calls
  • Audio level display
  • Call recording
  • Attended transfer
  • Blind transfer
  • Call encryption with SDES/SRTP and ZRTP
  • Mute
  • Hold
  • Wideband audio
  • Noise suppression
  • Echo cancellation


  • Encrypted password storage
  • Password protection with a master password
  • Encrypted Instant Messaging with Off-the-Record Messaging (OTRv4)
  • Chat authentication with the Socialist Millionaire Protocol over OTR
  • Call encryption with SRTP and ZRTP for XMPP and SIP
  • Call encryption with SRTP and SDES for XMPP and SIP
  • DNSSEC support
  • TLS support and certificate-based client authentication for SIP and XMPP Codecs
  • Audio: Opus, SILK, Speex, G.722, PCMU/PCMA (G.711),
  • iLBC, GSM, G.729 Annex C
  • Video: H.264, H263-1998 / H.263+
  • On-line contact list storage with XCAP

  • Secure signalling with TLS

  • DTMF (SIP INFO, RTP RFC 2833/4733, inband)

  • Message Waiting Indication (RFC 3842)

  • Certificate-based client authentication


  • On-line provisioning

  • Provisioning server discovery via DHCP and mDNS

  • IPv6 fully supported by SIP

  • Call history

  • Missed call notifications

  • Drag and drop support for file transfer

  • Cross protocol conference calls: call your contacts over different accounts and protocols and join them in a single conference call.

Instant Mesaging

  • Presence

  • One-to-one chats

  • Multi-user chats

  • File transfer

  • OTR encryption

XMPP Specific

DTMF (RTP RFC 2833/4733, inband)

Certificate-based client authentication

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