NCH Software "Carousel Telephony Adapter, VoIP Base FXO Gateway Driver" - free gateway driver for Windows.
Voicent Gateway - free VoiceXML gateway driver.
sipgateFFX by sipgate- browser plugin for Firefox.
Open Phone Abstraction Library.
- OpenH323.
OpenH323 Gatekeeper - The GNU Gatekeeper, Deutsche Homepage des GNU Gatekeeper.
dignum Switchvox "Switchvox Fire Dialer Extension".
- Blog Interlink Blog, Inter-Networking Application Experts: "How to Make Phone Calls through Switchvox from Your Firefox Browser", with “Snom 320” phone.
Blog Chad Smith: "Google Voice Add-on for Firefox".
PhoneTray Free - “Identify callers and zap telemarketers with this FREE Caller ID software”.

Soft Phones

3CX VOIP Client - 3CX SIP Telephone for Windows - free softphone for Windows.
- 3CX Forum.
  - Thread "3CX Phone - how to control by TAPI or WSH/PowerShell ?" - calling of numbers by command line option, e.g. “3CXPhone.exe dial:05112347019”
  - Thread "Sip:number launch app and dial".
- 3CX Wiki.
- 3CX Blog.
- 3CX Features: Free edition vs Commercial editions.
  - The commercial edition of 3CX VOIP Client is shipped with a TAPI driver.
antisip softphone - free softphone for WinXP and MacOSX.
Ekiga ( formely: GnomeMeeting ) - free OpenSource softphone for Linux with GNOME desktop.
- Ekiga Wiki.
ENUM RTC Softphone - free softphone for Windows ( sourcecode + binaries ).
1&1 SoftPhone - free softphone for Windows.
- Wo kann ich 1&1 SoftPhone herunterladen?
- The 1&1 SoftPhone is shipped with a TAPI driver.
NCH Software "Express Talk VoIP Softphone" Free Edition - free softwphone for Windows.
Gizmo5 free softphone for Windows, MacOSX, Linux.
- Google Voice Blog: "Google welcomes Gizmo5" ( 2009-11-12 ) - “we will be suspending new signups for the time being, and existing users will no longer be able to sign up for a call-in number”.
- Call these numbers with your SIPphone. A useful reference of common SIP numbers.
- SIPphone Developer - the SIPphone technology community.
- Gizmo5 SDK, Gizmo5 Developer.
- Phonegaim ( Phonegaim, Phonegaim, Sourceforge "Phonegaim", Sourceforge "Phonegaim" ).
- SIPphone Windows Client.
- Tell Me Developer.
- Free calls to 1-800 telephone numbers of the US telephone grid.
KPhone ( KPhone, Sourceforge:KPhone, Sourceforge:KPhone ) - free softphone for Linux.
- KPhone SCTP: sip over sctp.
Linphone - free softphone for Linux with GNOME desktop.
Global IP Telecommunications Ltd..
- "Ninja Lite", free softphone for Windows.
Google Open Softphone - free Java softphone, running on Linux and Windows. “The phone is tailored to be used in a Callcenter environment based on asterisk. It currently lacks a few features which a home user would expect. Most importantly these are SRTP and NAT traversal”.
Open SourceSIP.
- OSSPhone - OpenSource SIP softphone.
Phoner by Heiko Sommerfeldt.
- PhonerLite - free VoIP/SIP softphone for Windows.
- Phoner - free softphone for Windows. Phoner supports VoIP/SIP, CAPI and TAPI modes.
QuteCom ( formely: WengoPhone ) - free OpenSource softphone for Windows, MacOSX, Linux.
- QuteCom Wiki.
- QuteCom Repositories List.
- WengoPhone - free softphone for Windows, MacOSX, Linux.
- WengoPhone Wiki.
- kvats.
  - kvats -Technical Data, table with a list of (planned) features
  - kvats Voice-Over-IP Multimessenger.
- EeeUser Forum: "Eee PC Default Xandros Linux / video calls work - openwengo ftw!".
- KDE-Forum.org: "KAddressBook with WengoPhone" - WengoPhone has a command line interface !
- Future plan: Integration of WebKit into the standard QuteCome version. WebKit comes with support for JavaScript.
SJ Labs SJphone - free softphone for Windows, WinCE, MacOSX, Linux.
SIP Communicator - the Java VoIP and Instant Messaging client - free softphone for Java.
- Hochschule Mannheim "GOSSIP project".
- EN.Wikipedia: "SIP Communicator".
Research-Lab Inc "Telepati Sip Phone Freeware" - free softphone for Windows.
Empathy - free softphone for Linux with GNOME desktop.
Twinkle - free softphone for Linux.
CounterPath Corporation.
- CounterPath Corporation "Xlite" - free softphone for Windows, MacOSX, Linux ( sipgate "XLite" ).
- Bria, Bria for Microsoft Outlook, Bria Professional, eyeBeam - commercial softphones for Windows.
- Commercial Software Development Kits ( C++ Edition, COM Edition, Active X - Web Edition ).
Zoiper IAX & SIP softphone (formerly: “Idefisk” ) - free softphone for Windows, Linux, MacOSX.
freenet iPhone 1.9.0 - discontinued free softphone for Windows ( - May 26, 2008 ).
- Netzwelt: "freenet iPhone".
Nero SIPPS - discontinued free softphone for Windows.
- Nero SIPPS has a TAPI interface !
- Download: NeroSipps-2.1.6.27.exe.
- Manual: Nero Sipps Manual.
- WEB.De FreePhone by Nero AG - discontinued free Softphone for Windows ( - 2006-12-22 ).
  - Golem: "Web.de stellt FreePhone ein" .
pulver.Communicator - discontinued free Softwphone for Windows.
- Softpedia: "pulver.Communicator 0.99.1".
“T-Online Internet-Telefon” - discontinued free softphone for WinXP.
- T-Online Internet-Telefon has a TAPI interface !
- Download ComputerBase "T-Online Internet-Telefon 6.07.2730".
- Einstellung des Tarifs DSL Telefonie und der Software Internet-Telefon ( - 2009-07-15 ).
Vovida Open Communications Applications Library (VOCAL) by Vovida Networks.
- Vovida Open Communication Application Library Polish (VOCAL-pl) ( Sourceforge "vovida", Sourceforge "vovida" ).
- EN.Wikipedia: "Vovida Networks".
- Archive Vovida.org.
- Vovida.org - a communications community site dedicated to providing a forum for open source software used in datacom and telecom environments.
- Book Luan Dang, Cullen Jennings, David G. Kelly: "Practical Voip Using Vocal".
- voip-info.org: "VOCAL - Vovida Open Communications Applications Library".
- Linux Journal: "VoIPv6 on Linux with VOVIDA".
Zultys Technologies "LIPZ4" by Zultys, Inc.- discontinued free softphone for RedHat 7.1 / 8.0 / 9.0 Linux with KDE.
- redOrbit: "Zultys Technologies Releases Free Linux Soft Phone": “As the product shares the functionality of the ZIP 4×4, complete documentation is available, including a 194 page User's Manual”.
- Zultys ZIP 4x4 Documentation.
- Zultys LIPZ4 Documentation.
- Zultys Datasheets - Phones (English).
- Look for “softphone-1.3.11-0.i386.rpm”, and please tell me if you find a newer release.
innovaphone AG - commercial softwphones for Windows.
- Interfaces: XML, TAPI of innovaphone PBX.
  - innovaphone Softwarephone (upto V6).
- Interfaces: Microsoft Office Communication Manager - OCS.
  - Bria for Windows, innovaphone Softwarephone (ab V7).
The commercial Samsung OfficeServ Softphone for Windows.
The commercial Tadiran Telecom "FlexIP Softphone".

Soft Phones Frameworks

Google Code "sipml5. The world's first HTML5 SIP client".
- Google Code "sipml5. The world's first HTML5 SIP client" Wiki "Public_SIP_Servers" - List of public SIP servers.

Soft Stacks

antiSIP, The eXtended osip library - free SIP stack “eXosip2”.
Microsoft Developer Network "RTC Client API" for Windows.

Open SourceSIP.
- OpenSBC - OpenSource SIP proxy and B2BUA ( Back to Back User Agent ).

Grandstream Networks.
Cisco.
Polycom.
ZyXel.
Cyberdata.
Counterpath.
Yealink.
Aastra DeTeWe.
DialAnywhere Phone.

SIP IP DECT Cordless and WiFi Phones Provider.
1. Hitachi.
2. Dlink.
3. Kirk Wireless.

Hardware

Cologne Chip - “HFC” ISDN controller chips

Communication Server

Office Communication Server

Microsoft Office Communication Server 2007 R2.
- Hardware Phones designed for “Microsoft Office Communication Server”, compatible to “Microsoft Office Communicator”
- Polycom.
- Aastra.
OfficeSIP ( OfficeSIP Server, OfficeSIP Messenger, OfficeSIP Alerter ) - free communications server and messenger.
Project Scupa by SINC GmbH - Systems Integration. Network. Consulting
- “Project SCUPA is about developing extensions and add-ons for Microsoft Communicator 2007 R2. SCUPA enables users to initiate calls via desktop IP phones by selecting contacts in the communicator menu. Except for the Nortel/Polycom Tanjay, phones cannot be directly accessed from the Communicator application, a user therefore cannot initiate a phone-based VoIP call to an OCS contact from within Office Communicator. In our view, this lack of functionality severely hampers the usability of all other phones in an OCS environment. We have therefore developed an extension for Office Communicator 2007 R2 that enables call initiation with IP phones from within the application. In the first version, the extension is designed exclusively for the SNOM brand of IP phones.
OCS Phone Guy.
Microsoft Forums, Jan Boguslawski: "SCUPA - a Remote Call Control for the none-certified OCS phones".
Software Ruminations: "Microsoft Tanjay-Polycom CX700 OCS 2007 Phone" - “Microsoft Tanjay” product range ( “Polycom CX700”, “LG-Nortel 8540” ).

Asterisk

Asterisk Resources

Asterisk.Org.
Das Asterisk Buch.
Ralf Lange, longsoft Dresden: VoIP Portal - “Aufbau einer VoIP Nebenstellenanlage”.
Voip-Info.org - “A Reference Guide to all Things VOIP”.
- Asterisk Bootable CDROM.
Business Case: VoIP-Gateway mit Asterisk by Frank Ochmann, Daniel Scheller.

Standard Asterisk Implementations

rowi.net it-services, Dipl.-Ing. Rolf Winterscheidt.
- VoIP on CD ( german, english website ).
- VMware Virtual Appliance Marketplace: VoIPonCD - an easy to configure Voice over IP PBX.
- Rolf Winterscheidt: Entwicklung eines einfach konfigurierbaren Telekommunikationssystems 'VoIP on CD'".
- Login by shell, call “ifconfig” to display the IP address of the Asterisk webserver, and its web interface.
  - Linux-login: login=root, password=voiponcd ( see Problem with VoIPonCD, VMware Virtual Appliance Marketplace: VoIPonCD - an easy to configure Voice over IP PBX ).
- Call the IP address by your web browser ( e.g. http://192.168.xxx.yyy/admin” ).
  - Web browser login=admin, password=rowi.net ( see VMware Virtual Appliance Marketplace: VoIPonCD - an easy to configure Voice over IP PBX ).
FreePBX.
AskoziaPBX.
pascom Netzwerktechnik GmbH & Co. KG "MobyDick".
- pascom Netzwerktechnik GmbH & Co. KG "MobyDick Community" - download of the free “MobyDick Community Version” for x86 virtual machines ( VMware, VirtualBox,..), with Windows & Mac clients.

SIP Router Project / SIP Express Router (SER ) / OpenSER

Some other Communication Servers

SIPfoundry sipXecs IP PBX - The Open Source SIP PBX for Your Enterprise .

|Open SourceSIP.
- OpenSBC - OpenSource SIP proxy and B2BUA (Back to Back User Agent ).

3CX Phone System for Windows Free Edition - free VoIP PBX / SIP server.
IPTAM PBX - with the free version, 5 users can be administrated.
TERAVoice Server 2004 Free Version.
Cisco Unified Communications Manager (CallManager) - commercial communications server.
innovaphone PBX - commercial communications server.
SwyxWare: SwyxWareCompact, SwyxWare Essential - commercial communication servers.
SKYSTONE, a commercial Skype Gateway.
Nero SIPPSTAR IP-PBX - discontinued commercial communication server ( - Okt 21, 2006 ).
Sangoma - Application Partners.

Ressources

ITWissen - das große Online-Lexikon für Informationstechnologie: "Kommunikationsserver. communication server".

SIP Service Provider

SIP Service Provider with free Basic Account ( 2022 )

Sipgate.
- Sipgate - Einrichtung.
- Sipgate - Snom320.

fonial GmbH - “Ein Unternehmen der EnBW”.
- fonial GmbH "Ihr SIP Provider aus der Cloud" - “Ein Unternehmen der EnBW”.
- Tarif “fonial FREE”.
  - “Bei ausgehenden Telefonaten fallen folgende Verbindungsentgelte pro Minute an”.
  - “Neue Rufnummern bestellen”.
    - “SEPA-Lastschriftverfahren”.
    - “Adressnachweis” - It is necessary to upload documents. No sending of a paper letter to the postal address.
  - “Einrichtungsassistent”.
    - “IP-Endgerät anlegen” .
      1. Anderer Hersteller.
      2. snom D305, D315, D335, D345, D375, D385, 710, 715, 720, 760, D710, D712, D713, D715, D717, D725, D735, D745, D765, D785, C520, 820, 821, 870, 360, 370.
      3. Gigaset C500HX, C570HX, CL660HX, C430A Go, S650H PRO, S850A GO, SL750H PRO, E630 HX, R650 H PRO, S650 IP PRO, PRO Maxwell, PRO Maxwell 2, PRO Maxwell 3.
      4. Yealink T21P, T31P, T41P, T42G, T42U, T46G, T46U, T48G, T48U, T41S, T42S, T46S, T48S, T49G, T57W, T58A, T56A, T55A, CP920, CP960, T53W, T54W, T29G, VP59.
      5. Mitel 6755i, 6863i, 6865i, 6867i, 6869i, 6873i.
      6. Softphone.
    - “Interne Durchwahl” - “Die Nebenstelle muss mindestens 1, maximal 999 sein”.

Some other SIP Service Providers ( 2008 )

antiSIP.
e164.org.
Ekiga.
Nero.
reventix GmbH - SIPbase.
- reventix GmbH - SIPbase "virtuelle Telefonanlage".
- Blog Im Internet Telefonieren.
”IP49.de Kostenlos Telefonieren”, ”0tarif.de Kostenlos Telefonieren”.
- dns.IP49.de.
- RegioABC - “VOIP Telefon - u. Branchenbuch mit > 30Mio. Einträgen”.
VoIPtalk, UK.
VoIP User.
WengoPhone.
Voiceglo
Stanaphone

Resources

Express Talk SIP Service Providers. PC-to-PC and PC-to-Phone SIP Providers.

SIP Criticism

There is no status display, whether a person is willing to accept calls, which is a standard feature for Unified Messaging systems ( “Availability” / “Kommunikationsbereitschaftsanzeige” ).
There is no way to encrypt communications on ISO Layer 2, where it would be useful. On the other hand, Microsoft with its properitary protocols encrypt communications on ISO Layer 3 ?! There are 3 different ways to encrypt communications, Microsoft choose one of it.

Ressources

Global IP Telecommunications: Sipgate Konfiguration for X-Lite.

Appropriate OpenDirectory Directory Pages

en/sip.html.txt · Last modified: 2025/07/06 08:16 (external edit) · []

[Hemmerling] Telephony by the "Session Initiation Protocol" ( SIP )

The "Session Initiation Protocol" ( SIP )

SIP Telephones

Ressources

Software Tools

Soft Phones

Soft Phones Frameworks

Soft Stacks

SDKs, Frameworks, Developer Toolkits

Hardware Phones

Some other Hardware Phones

Hardware

Communication Server

Office Communication Server

Asterisk

Asterisk Resources

Standard Asterisk Implementations

SIP Router Project / SIP Express Router (SER ) / OpenSER

Some other Communication Servers

Ressources

SIP Service Provider

SIP Service Provider with free Basic Account ( 2022 )

Some other SIP Service Providers ( 2008 )

Resources

SIP Criticism

Ressources

Appropriate OpenDirectory Directory Pages