Freeware Listing: Sip
- ZOIPER Free IAX and SIP softphone
- License: Freeware

ZOIPER Free Version 2.0 is a new generation SIP and IAX softphone compatible with the Asterisk platform as any other SIP or IAX capable system. ZOIPER Free Edition features include: SIP + IAX/IAX 2 protocols, STUN support, STUN server per account, Echo cancellation, DTMF tones sending, Support for multiple audio devices, Automatic user registration, Call transfer, Hold function, Codecs: GSM, ulaw, alaw, speex, ilbc, Adaptive, Call history, Address book, Quick dial panel, Optional Automatic pop-up window for incoming call, Always on top, Call logs, Voice mail message information, Account password encryption, Upgrade notification, Jitter Buffer, Adjustment of audio device, Codecs priority, Portable storage compatibility, Multilanguage support; ZOIPER can also be re-branded.
- Publisher: Securax
- Date: 19-07-2007
- Size: 2084 KB
- Platform: Linux, Mac OS X, Win2000, Windows Server, Windows Vista, WinOther
- Symbian SIP Client
- License: Freeware

The symbian dialer is meant for service providers who can use this Softphone and get it integrated with their existing SIP servers. It works just like standard SIP Softphones i.e. it gets registered on the SIP server and then let the authentic caller makes calls. The biggest advantage that this symbian voip client provides is the huge base of potential customers who can now make calls using their standard mobile phones. The mobile phones need to be connected to the internet either through GPRS/EDGE/Wi-Fi/3G. Features * Customized with company name * Unlimited user license * SIP protocol support * Making and receiving calls * Codecs supported: g729,g711,GSM * Balance Display * Call Status Indicator * Save / Edit Username & Password * Work with all standard SIP SoftSwitches * Symbian (S60...
- Publisher: AdoreSoftphone
- Date: 10-02-2010
- Size: 49 KB
- Platform: Symbian
- PCBest Networks SIP PBX V
- License: Freeware

A Windows free SIP IP PBX software. It is very easy to use and deploy, with powerful features like:ACD, Auto Attendant, Call Park, Ring Group, Conference, Call Pickup Group, Auto Outbound Dialer, Database CDR report, Database PBX Status Report. It supports SIP extensions, SIP accounts, inbound and outbound calls, and customized dial plans. With new plugin feature, you can use C# or vb.NET to build customized auto-attendant for PBX, or develop your own IVR menu in just minutes. PCBest Networks SIP PBX v2..
- Publisher: PCBest Networks
- Date: 25-05-2011
- Size: 4139 KB
- Platform: Win2000, Windows Server, Windows Vista, WinOther
- PCBest Networks SIP PBX
- License: Freeware

A Windows free SIP IP PBX software. It is very easy to use and deploy, with powerful features like:ACD, Auto Attendant, Call Park, Ring Group, Conference, Call Pickup Group, Auto Outbound Dialer, Database CDR report, Database PBX Status Report. It supports SIP extensions, SIP accounts, inbound and outbound calls, and customized dial plans. With new plugin feature, you can use C# or vb.NET to build customized auto-attendant for PBX, or develop your own IVR menu in just minutes..
- Publisher: PCBest Networks
- Date: 26-11-2012
- Size: 4137 KB
- Platform: WinOther
- Firebox SIP
- License: Shareware

Firebox SIP is an easy to use application that allows you to make cost-effective phone calls. The program is a desktop SIP client for the Firebox service.
Using Firebox SIP, you can nake phone calls from your computer, thus saving money. You just have to sign in with your account details.
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- Publisher: FireBox Inc
- Date:
- Platform: WinOther
- ZoIPer Free SIP and IAX softphone
- License: Shareware

ZoIPer is a new generation SIP and IAX softphone compatible with the Asterisk platform as any other IAX or SIP capable VOIP system.
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- Publisher: ZoIPer.com
- Date:
- Platform: Win2000, Windows 7, WinOther, WinServer, WinVista
- SIP Inspector
- License: Freeware

SIP Inspector is a tool written in JAVA to simulate different SIP messages and scenarios. You can create your own SIP signaling scenarios, customize SIP messages and monitor incoming and outgoing messages. The tool can play RTP streams from a pcap file. for WindowsAll
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- Publisher: Zarko Coklin
- Date:
- Platform: WinOther
- ABTO VoIP SIP SDK
- License: Shareware

ABTO SIP SDK provides a solution to quickly build VoIP softphone that can dial and receive calls on your computer or add VoIP features into your software or web website.
The ABTO SIP SDK contains a high performance VoIP conferencing client capable of delivering crystal clear sound even for both low and high-bandwidth users and SIP compatible devices (hardware and software).
It enables a worldwide communication over the internet or intern networks either by speaking and/or by text messages and delivers superior voice quality by integrating advanced configurable digital voice processing features including auto gain controller, acoustic echo suppression, noise suppression, reverb suppression and mute microphone/speaker for each line.
- Publisher: conaito technologies
- Date:
- Platform: Win2000, Win7 x64, Windows 7, WinOther, WinServer, WinVista
- MediaGateway SIP Example
- License: Shareware

MediaGateway SIP Example is a demonstration program that intends to demonstrate the communication between two Silverlight clients by using the Ozeki VoIP SIP SDK . It can also be used to demonstrate the communication between a Silverlight client and a SIP softphone.
The point is that the SIP telephone or softphone also needs to be registered on the same SIP PBX or can be called with connection. The Silverlight clients that connected to the server will register to the SIP PBX specified on the server side with a SIP account selected by the server.
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- Publisher: Ozeki Informatics Ltd
- Date:
- Platform: Win7 x64, Windows 7, WinOther, WinVista, WinVista x64
- Ozeki VoIP SIP SDK
- License: Shareware

Ozeki VoIP SIP SDK is a software development kit for allowing voice and video call features to applications and webpages.
It can be included in any software developed in .Net. Its greatest advantages are that it uses managed code and it handles great numbers of simultaneous calls. Ozeki SIP SDK can be used to build softphone, webphone solutions, SIP based voice and video applications for call centers, CRM systems and IMS solutions.
SIP VoIP call services like IVR, autodialer or a voice conference room can also be created. It is compatible with most of the PBX systems like Cisco UCM, Asterisk PBX, 3CX Phone System, etc.
- Publisher: Ozeki Informatics Ltd
- Date:
- Platform: Windows 7, WinOther, WinVista
- SIP Digest Response Calculator
- License: Freeware

SIP Digest Response Calculator was developed as an easy-to-use and accessible piece of software that manages to calculate the response for SIP Digest Authentications.
All you have to do is launch the software, input all the required parameters and press the "Calculate" button.
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- Publisher: Michail Koreshkov
- Date:
- Platform: Windows 7, WinOther, WinVista
- Sie's HTTP/SIP MD5 Calculator
- License: Shareware

Sie's HTTP/SIP MD5 Calculator is a compact tool that allows you to learn more details about the MD5 authentication calculation. The calculator was developed to help the programmers that need to check their code in order to find the problems with the code.
The application allows you to enter the HTTP message details and to view the MD5 response. The detailed view also displays the calculation steps in order to check the response piece by piece.
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- Publisher: sieraybould
- Date:
- Platform: WinOther
- SIP Workbench
- License: Shareware

SIP Workbench is a protocol analyzer that can display and analyze multi-protocol interactions. Thus, users will be able to easily identify possible problems related to packet interactions, failed requests or timing inconsistencies.
The program can capture network traffic easily, displaying the missing or negative responses and the timing characteristics.
Correlating SIP messages, compare message flows and reading network captures are just a few of the advantages that SIP Workbench brings you.
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- Publisher: BreakPoint Software
- Date:
- Platform: Win2000, Win7 x64, Windows 7, WinOther, WinVista
- SIP Test Studio
- License: Shareware

SIP Test Studio is an easy to use performance testing tool for the SIP protocol..
- Publisher: Olivier Jacques
- Date:
- Size: 2734 KB
- Platform: WinOther
- Telepati SIP Phone Freeware
- License: Freeware

Telepati SIP Phone Freeware allows you to make PC-PC phone-phone calls over the Internet. Developed using Research Labs VOIP SIP Phone SDK, this free soft phone brings SIP protocol support for ActiveX. With this phone once you set the gatekeeper proxy with the username and password from your providers, you can connect and start speaking with anyone on the internet. Now VOIP open source projects have made it easier to implement a customized VOIP Solution eliminating costly PSTN lines. Though this implementation might turn out fairly complex, our VOIP Implementation Team at Research-Lab will guide you remotely for the same.
- Publisher: Research Lab Inc
- Date: 05-02-2005
- Size: 1471 KB
- Platform: Handheld, Palm OS, Pocket PC, Symbian, Win2000, Windows CE, Windows Mobile, Windows Server, WinOther
- 3CX VOIP Phone for Windows
- License: Freeware

Free VOIP / SIP phone. Use your PC as a phone. Works with any SIP / VOIP provider/ phone service. Use instead of the soft phone provided by your VOIP provider which locks you into their VOIP phone service.
Easy to use interface includes dial pad and buttons to transfer or forward a call. Set-up conference calls with a few mouse-clicks. Includes call log, phone-book, call status & statistics and more. Available in English, German, Spanish, French & Portuguese. Free download from site
Features include:
* Integrated phone book (allows you to assign caller ID to a name)
* Supports several SIP profiles
* Displays caller ID
* Individual ring tones (per caller)
* Drag & drop handling
* Call log
* Incoming calls: identify,...
- Publisher: 3CX Ltd
- Date: 07-02-2006
- Size: 1103 KB
- Platform: Win2000, Windows Server, WinOther
- OfficeSIP Alerter
- License: Freeware

OfficeSIP Alerter is a simple, easy-to-use and free sip messenger. It was not designed for prolonged chat, it is handy when you need to send or receive single message. It is good replacement for old-fashioned Alerter Service. OfficeSIP Alerter has simple interface but it is based on Session Initiation Protocol, so you can exchange messages with users of Windows Messenger or other sip messenger..
- Publisher: OfficeSIP Communications
- Date: 12-02-2008
- Size: 661 KB
- Platform: Win2000, Windows Server, Windows Vista, WinOther
- 3CX FREE VOIP Phone for Windows
- License: Freeware

Free VOIP / SIP phone (softphone). Use your PC or laptop as a phone. Works with any SIP / VOIP provider/ phone service. Use instead of the soft phone provided by your VOIP provider which locks you into their VOIP phone service. Easy to use interface to transfer, forward calls or review history of calls. Call log, caller ID, integrates with MS Outlook. Available in many languages. Free download from http://www.3cx.com. Features include * Supports several SIP profiles * Displays caller ID * Shows personal call log/history * Incoming calls - identify, accept, reject or ignore * Put calls on hold (HOLD) * Transfer calls with the click of a button (ECT) * Diverts calls to voice mail * BLF - change status option * Shows extensions, lines and queues in one or multiple screens * Message Waiting Indication (MWI) *...
- Publisher: 3CX Ltd
- Date: 28-07-2008
- Size: 3395 KB
- Platform: Win2000, Windows Server, Windows Vista, WinOther
- 3CX Phone System for Windows Free
- License: Freeware

Eliminate PBX headaches with 3CX Phone System for Windows! Evolve your communications with 3CX Phone System for Windows - an office phone system/IP PBX that completely replaces your proprietary PBX, supports standard SIP soft/hard phones, VoIP services and traditional PSTN phone lines. 3CX Phone System is far less expensive than a traditional PBX and can reduce call costs substantially by using a VOIP service provider. Its web based administration makes phone system management easy. 3CX Phone System eliminates the phone wiring network and allows users to hot desk simply by taking their phone.
- Publisher: 3CX Ltd
- Date: 08-12-2008
- Size: 33243 KB
- Platform: Win2000, Windows Server, Windows Vista, WinOther
- Free Softphone Software
- License: Freeware

We believe that our customers deserve nothing short of best. To cater the varied communication needs of our clients and deliver superior solutions and services in Softphone. Our first model is Adoresoftphone Lite 2.0, which is the basic model of SIP Softphone especially designed to give you a soothing communication experience. Every model of SIP Softphone is crafted out while keeping the various requirements of our clients. This Softphone comes with the following set of featuresFeatures: * VPN Support (Additional Cost) * Customized skin interfaces * Call timer * Last Number Redial * Local signaling (Dial tone, busy, ring back, etc.
- Publisher: Adore Infotech
- Date: 09-10-2009
- Size: 2457 KB
- Platform: Win2000, WinOther
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