Asterisk is an open source pbx and telephony toolkit.

this channel driver (chan_ooh323c) provides support for the h.323 protocol for asterisk. this is an implementation by objective systems, inc. and does not use the openh323 library.

this is one of many h.323 channel implementations for asterisk with others being chan_h323 and chan_oh323, distributed by debian as asterisk-h323 and asterisk-oh323, respectively.

for more information about the asterisk pbx, have a look at the asterisk package.