Currently linphone in Extras uses a copy of the ortp library that shipped in the
linphone sources.  They also ship a standalone tarball here:

http://www.linphone.org/ortp/sources/
We need the linphone package split into ortp and linphone, so ortp can be
imported into FC5.  Peter Lawler informs me that gaim will use ortp for its
Googe Talk voice capability.

I will assist in Extras package review of ortp, just assign it to me when
someone has the package ready.