Details for creating a VoIP presence

Requirements

Primary

• Talk to Windows users
• Video chat
• Presence notification
• Portable VoIP address

Secondary

• Talk to gTalk users
• Secure Authentication
• Encryption
• IPv6?

Protocols

Call Control

• SIP
• Jingle

Presence

• SIMPLE
  • No federation?
• Jabber/XMPP

Encryption

Articles

• http://blog.tekelec.com/blog/?Tag=Encryption
• http://lwn.net/Articles/354827/

Protocols

• SIPS - control channel encryption
• zRTP
• SRTP

Clients

Comparison

Nokia

• Native - working
• Supports SRTP (?)

Linux

• Ekiga - SIP,SIMPLE
  • contacts list is in CVS
  • XMPP support pending?
  • No bluetooth headset support
• Gizmo - x86 only - SIP,Jabber
• Empathy/Telepathy
• WengoPhone? - SIP,Jabber
  • QT
  • no video??
• Twinkle
  • QT
  • Just doesn't fucking work
  • SRTP and zRTP support
• SIP Communicator
  • Java

Windows

• Gizmo - SIP,Jabber
• Xten - SIP,SIMPLE
• GTalk? - Jingle,Jabber
  • no video?

Addressing

Incoming

• Want to have sip:mark_AT_markferry_DOT_net point to sip:gnomeza1_AT_ekiga_DOT_net
• Need a "SIP registrar proxy"?
• Free SIP address forwarding service?
• DNS SRV record will point users to SIP address forwarding service
• http://www.voip-info.org/wiki/view/DNS+SRV

Redirection

• Installed sip-redirect
• Configured SIP SRV for udp 5060

Verification

• Support signed-by header?

Services

• Gizmo
• Ekiga
• VoIPfone.co.uk
  • Doesn't support redirects
  • Requires personal details

Servers

Comparison

• Kamailio
• OpenSIPS
• Asterisk
• FreeSwitch

Solutions

Talk to Windows Users, Video Chat

• SIP
• Ekiga (Linux), Gizmo (Windows), XTen? (Windows)

Presence

• Jabber/XMPP
• Gizmo (Windows)

Conclusion

There is no solution for cross-platform open-protocol VoIP video-conferencing