H323Phone DLL

VOIP H323DLL Soft Phone SDK brings H.323 protocol support for ActiveX. With this SDK one can create a simple program to connect and start speaking with anyone with a direct IP Address or use the Gateway or the Gatekeeper to connect to /or from PSTN lines. 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.


If you have a good quality Internet connection you can get your phone service delivered to you through your Internet connection instead of from your local phone company. We apply only one time nominal $399 charge for the latest version and Implementation Guidelines all for a download, see the sample below. Please note, this includes a PowerPoint Presentation for the best of H323 Soft Phone Implementation for your home or office.

SDK Features:

IP-Address based direct local connectivity within LAN
Gateway Specification with/without Login
Gatekeeper Specification with/without Login
Proxy/Firewall support for Version 2.0 [i.e. for Registered Users]
Voice/Ring Volume Adjustment [i.e. for Registered Users]
Save a conversation to a wave file [i.e. for Registered Users]
Create a Answering Machine
Create a Interactive Voice Response
Create a Professional Call Center

VOIP using an IP Phone [registered users only]

H323DLL SDK based IP Phone ----- Ethernet ----- Router ---- Internet ---- VOIP Service Provider


VOIP connecting directly [demo available]
It is also possible to bypass a VOIP Service Provider and directly connect to another VOIP user. (NAT Implementation essential)

H323DLL SDK based IP Phone ----- Ethernet ----- Router ---- Internet ---- Router ---- Ethernet ---- H323DLL SDK based IP Phone