SJphone – Free Softphone
January 22, 2010 VOIP Reviews, VOIP Software
SJphone® is a VOIP softphone that allows you to speak with any other softphone running on a PC/ PDA, any stand-alone IP-phone, or using VOIP service provider with any traditional wired or mobile phone. It supports both SIP and H.323 standards and is fully inter-operable with most major VOIP vendors and Service Providers.
Having SJphone installed is not enough to talk except over your local network. You have to obtain an account with any ITSP like Vonage or Free World Dialup, or install your own VoIP server.
New features:
1. Audio Wizard enabling the user to fine tune Audio options
2. New Interface tab in Options enabling the user to select SJphone Interface language.
3. Improved interoperability for a number of SIP softswitch vendors
4. Protection against DoS attacks. The SJphone now consumes only limited resources, and in case of overload SJphone answers with the “503 Service unavailable” message.
Requirement:
A wideband internet connection like DSL, 802.11a/b/g/n wireless, or an old good wired Ethernet or E1/T1. Dial-up users are welcomed too, but a GSM or iLBC codec must be used.
- You can use any today x86 PC running MS Windows ME/2K/XP, MAC OS, Linux. Also you can use a PDA running PocketPC 2003; choose and download your version of SJphone from our website. Ask us about other technologies.
- Full-duplex sound is a must. To check it, run a recorder and player at the same time. If the both work properly, you have a full-duplex soundcard, that’s OK.
Services and profiles:
- You can make direct free calls to your party’s IP-address using “PC-to-PC” services.
- For internet calls and for calls to / from regular telephones, you may obtain a VOIP service provider. You can sign up to several different services and easily switch between them. Install a new service profile, initialize it with your login and password, and enjoy!
- Experienced users may build their own IP-telephony network; they can create new service profiles themselves.
- Our software works with with most ip-PBX, SIP-proxy and H.323 gatekeepers, and gateways just by adding a new service profile.
- How to use the services behind firewalls, see part 3.
How to get best quality:
- Most notebooks and PDAs have embedded microphone and speakers. To get better audio quality and to avoid echo you may use any USBphone (download an appropriate driver from our website), BlueTooth or a simple wired headset;
- We recommend you to install the latest updates of Operating System, sound and network drivers, and DirectX (check with dxdiag.exe, it should be 7.0 or higher). Get updates from the vendor website or just run MS Windows update.
– Please make sure that your microphone and speaker provide a good enough sound quality;
- You may have problems with old consumer PDAs that weren’t designed for VOIP. Most of latest devices have embedded wireless, good CPU and sound system now, and work perfectly;
- Check Internet connectivity: Try to ping your party’s IP address. A good response time is under 100 ms unless the party you are calling to is from down under. If the ping time seems too large, you Internet connection is too busy now. Try to stop any other Internet activity. If the problem persists, ask your Internet provider or system administrator to fix it.
- For the best voice quality use G.711 codec on broadbands, for dial-ups try GSM, iLBC, or other codes;
- Normally you should hear Voice over IP much better than using old plain or mobile telephony. Sound delays, echo, voice outage, and distortions are network or hardware problems;
Download SJphone
SJphone for PC (stable):
SJphone for MS Windows XPsp2, v.1.65.377a, 20.03.07 (NEW!)
SJphone for MS Windows XPsp2/2000sp4, v.1.60.289a, 06.19.05
SJphone Linux, v.1.60.299, 09.24.05
SJphone MAC, v.1.60.299, 09.24.05
SJphone for WLAN-PDA with Windows CE(stable):
SJphone CE .cab for Pocket PC 2003 v.1.60.303c, 10.26.05
SJphone CE .exe for Pocket PC 2003, v.1.60.303c, 10.26.05
SJphone CE .cab for Pocket PC 2003SE, v.1.60.303c, 10.26.05
SJphone CE .exe for Pocket PC 2003SE, v.1.60.303c, 10.26.05