H323和SIP果然難于共存。Openh323原有的開發(fā)者也將分為兩大塊：

OPAL VOIP： 保留Opal現(xiàn)有H323功能，但重點明顯是要向兼容SIP方向發(fā)展；其網(wǎng)站介紹為：

OPAL implements the commonly used protocols used to send voice, video and fax data over IP networks. Originally part of the OpenH323 project, OpalVoip has grown to include SIP and IAX2.

h323plus：在原有OpenH323基礎(chǔ)上繼續(xù)完善ITU的H323系列的協(xié)議，其介紹為：

            The H.323 Plus project intends to do much more than simply provide a new home for open source H.323 developers. Developers have told us they intend to work to provide significant new enhancements to the very successful H.323 systems deployed worldwide. For example, NAT/FW traversal, instant messaging, presence, and many other enhancements are already in progress or being planned. Further, the open source community has expressed interest to us to enable more collaborative features to H.323, including such things as application sharing, whiteboarding, and other capabilities.（可惜，這些功能OPAL將不能用到了）

至于底層的pwlib（即ptlib）估計暫時還會保持一致。

分家后期郵件列表也將分開：

https://lists.sourceforge.net/lists/listinfo/opalvoip-devel

http://lists.packetizer.com/mailman/listinfo/h323plus

網(wǎng)站地址分別：

http://www.h323plus.org/

http://www.opalvoip.org/

對于我們可能會更關(guān)心OpenH323的主要開發(fā)者 Simon 的以下言論：  

The following projects are currently planned to be supported within H323plus.

OpenMCU (including remote conference controls) OpenAM  (upgraded to support VoiceMail support to GnuGk) MyPhone OhPhone

The Library is almost drop-in replacable with the existing OpenH323 and contains numerous enhancements including video plugins (compatible with

Opal) and large amount of new work not currently supported in Opal.

Some of the new work now available in h323plus H.230  Conference Controls (incl tunneling GCC (T.124))

H.239  Application Sharing

H.249  Extended user inputs

H.341  SNMP support

H.350  LDAP WhitePages

H.460  Numerous custom Extensibility features

        Text Messaging (working doc ITU),

        Follow Me,

        PDI (Personal Data Interchange)

H.460.9 RealTime QoS Measurements

Video Plugins (fully compatible with Opal)

H.235 Plugins (for external Biometric and smartcard authenticators) QoS Capability negotiation Conference Controls capability advertisement.

New work planned/proposed

H.460.presence

H.460.18/19 Nat Traversal

Video on Demand project (using H.239/H.249)

We can also provide full consulting service support for existing openH323 based projects as well as provide assistance in migration of these projects to h323plus.