This section contains information to help solve some common problems experienced by SDK users.

Where can I go for more help?
Send an e-mail to us: support@portsip.com or contact our support MSN: portsip@hotmail.com

How can I obtain a evaluation version of PortSIP VOIP SDK?
You can always download the latest evaluation version of PortSIP VOIP SDK on the download page(http://www.portsip.com/downoads.htm).

How can I purchase PortSIP VOIP SDK?
You can view the support page(http://www.portsip.com/support.htm) to got the details.

Does it support video call?
Yes, it's supports the video call: H263, H263-1998 and H264 codecs.

Does it support record phone conversation ?
Yes, phone conversation recording feature is supported, it can be recording the audio conference conversation too.

What functional limitations does the evaluation version of PortSIP VOIP SDK have?
The evaluation version allows only two minutes for conversations, which will be cut off automatically after two minutes

Does it support DTMF?
Yes, REC2833 and SIP INFO method are supported.

What codecs does it support?
G711 A-Law, G711 U-Law, iLBC, G723.1, G729 and GSM 6.10 are supported.

Can you customize your software specifically for our needs ?
Yes, We provide customization of our SDK, Whether you need pretty GUI and private labeling other private & specified functionalities of the softphone, we offer services to meet your needs, such as DNS SRV, Auto provision, account balance displaying on the skin, call history  and contacts management. Please send us your requirements and one of our sales people will contact you soon(sales@portsip.com).

Can I use Microsoft Visual Basic with the SDK?
Yes. Microsoft Visual Basic 2005 and Visual Basic 2008 are supported. You can download the sample at http://www.portsip.com/downloads.htm

Can I use Microsoft Visual Studio 6.0 with the SDK?
Yes, PortSIP VOIP SDK V3.0 supported Visual C++ 6.0.

Can I use Borland Delphi with the SDK?
Yes. PortSIP VOIP SDK V3.0 supports Borland Delphi 6.0/7.0 .

Can I use CodeGear Delphi/C++ builder with the SDK?
Yes. PortSIP VOIP SDK V4.0 supports CodeGear Delphi 2007 and C++ builder 2007.

Can I use Microsoft Visual Studio .NET with the SDK?
Yes, Microsoft Visual Studio 2005(VC++ 8.0), Visual Stuido 2008(VC++ 9.0) are supported.


How to get the best voice quality?
Most of mobile computers have an embedded microphone and speaker. Make sure that your microphone is good enough by trying to record your speech. In order to get better audio quality and avoid echo, you may use headset, Blue Tooth, and wired headset etc;
We strongly recommend you to install the latest version of operating system, sound and network drivers, and DirectX (check with dxdiag.exe, it should be 9.0 or higher).
Check your Internet connectivity by pinging your party's IP address. A proper response time is below 100 ms unless the party you are calling is from Down Under. If the ping time seems too large, you Internet connection is too busy now. Try to stop any other activity. If the problem persists, ask your Internet provider or system administrator to fix it.
For the best voice quality, use the G.711 codec on broadband, on dialup try the G729, iLBC, or other codecs;