Free sip softphone software for windows

Minipax SIP Softphone 2.8.5 is an advanced product of Vidosystem Softphone which had successfully recode sip engine to produce more robust, small application, better nat traversal sip softphone. Minipax NOW support SIP tunneling. SIP tunneling works where clients firewall blocked or on a country where voip is blocked. SIP tunneling also give more security to voip

Minipax support hold function, mute function, mic/spk volume control, transfer call, forward call, call recording, auto login to web billing CDR, call history, address book, balance display, fully skinable look n feel, available for private label and logo. Minipax able to capture credit or balance from sip messages (tested with porta billing/porta switch). Minipax is designed for ITSP which need customized sip softphone.

Major Features:

1. Customized editable skin interfaces*
2. SIP tunneling supported*
3. Support Audio codec : g729*, g723.1*, speex, gsm, g711
4. QoS - Quality of Service
5. Transfer call
6. Forward call
7. Capture credit/balance on sip message
8. Call timer
9. Countdown call timer
10. Display Balance and CDR
11. Last Number Redial
12. Local signaling (busy, ring back, etc.)
13. Early media for Ringback tone
14. Send DTMF as RFC2833, as inband and SIP INFO
15. Address Book
16. Work with any full-duplex sound card
17. Embedded to USB stick phone or other mass storage
18. Native NAT/Firewall traversal with STUN and UPNP
19. Uses NEW RFC 3261 compliant stack
20. DNS support
21. Smaller application size (approx. only 1 MB)
22. Not using any .NET and Java Runtime Library

Sipek Softphone 0.3.136.108 lends you convenience of using a SIP phone and messaging client based on SipekSdk engine which is powered by pjsip.org SIP stack.

Combining voice calls, Instant Messaging and presence in an intuitive user interface, Sipek takes you into the world of Voice over IP. The Sipek Softphone simple software design enables efficient development, easy upgrading and user interface customizations.

Requirements:

• Microsoft .NET Framework 2.0
  

Support USB phone
PC to PC, PC to Phone, Phone to PC
H323 compliant
Touch-tones [DTMF]
Dial/ Redial/Hangup
Dynamic CODEC Selection
Caller ID
Call Timer
Backspace/Clear/Delete
Microphone & Speakers Levels
Last Caller-IDs
Recent Calls Dialed
Recent Calls Received
Sound Device Selection
New Familiar-looking Menu
Phonebook
Speed Dial
Benefits:
Easy to install
Intuitive user interface & Menu.
Easy to navigate and configure.
G.723/729/GSM codecs included
NAT/Firewall support
Multiple gatekeeper selection
Customised skin can be provided by Author

Belkin SoftPhone is a free computer software which allows you to make free calls over your broadband Internet connection Belkin SoftPhone is a free computer software which allows you to make free calls over your broadband Internet connection to other VOIP customers around the world. You can make calls to every phone number in the world.

Xtenn iBeam Softphone supports VoIP, Video and Instant Messaging Xtenns Video SIP Softphone software supports VoIP, Video and Instant Messaging
Main features:
- Easy user Install
- Intuitive user interface
- Configurable ?skins? for user interface
- Easy access to video and contacts via sliders
- Supports Windows 95/98/ME/NT4/2000/XP
- Standard PC hardware support
- Auto-Configuration of settings for easy deployment
Here are some other features of "Xtenn iBeam Softphone":
- 10 party conferencing[IP & PSTN]
- Do Not Disturb
- Auto Conferencing
- Inbound Call Ignore
- Advanced Codec Settings
- Inbound Call Go to Voicemail
- Voice Activity
- Detection Line Hold
- Call Forwarding
- URI/URL Line Transfer
- Voicemail URL
- Auto-answer
- Audio Recording
- Caller ID [SIP ID]
- Echo Cancellation [EC]
- Call Timer
- Message Waiting Indicator
- Silence Threshold
- Audio Tuning Wizard
- Dial/Redial/Hang up
- Touch-tones
- IP to IP Calling