Gatekeeper is very stable. It is being used commercially by many organizations to provide VOIP or conferencing services.
we provide executables for Linux, Windows, MacOS X, Solaris, FreeBSD, OpenBSD and NetBSD
can run as a Windows service
accounting and call authorization via SQL database, Radius, file or external application
database drivers for ODBC, MySQL, PostgreSQL, SQLite and Firebird
flexible call routing
number rewriting (calling and called)
support for NAT traversal (H.460.18/H.460.19, H.460.23/H.460.24 or own method)
full H.323 proxy
TCP interface to applications
CTI functions (eg. VOIP call-center, call transfers)
gatekeeper clustering support (neighbors, parent/child, alternates)
H.235 security
graphical user interface