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https://origsvn.digium.com/svn/libpri/branches/1.4 ........ r1923 | rmudgett | 2010-08-30 14:31:46 -0500 (Mon, 30 Aug 2010) | 18 lines Q.921 improvements from comparing Q.921 SDL diagrams with implementation. * Handle sending and receiving DM response frames as needed. * Added handling of received FRMR frames. * Completed implementation of Q921_AWAITING_RELEASE state. (State is currently unreachable since we have no API to initiate sending the DISC message.) * Better NT PTMP TEI allocation. * Reduced more ERROR level severity messages so users will stop panicking when they see ERROR. This is especially true for the Q.921 MDL-ERROR messages. * Added better Q.921 visibility when normal debug message level is enabled. ........ r1928 | rmudgett | 2010-08-30 15:30:59 -0500 (Mon, 30 Aug 2010) | 9 lines Q.921/Q.931 message debug output improvements. The Q.931 message decode debug output now will follow the correct Q.921 header decode if Q.921 message dumping is enabled. Also the Q.931 message decode will happen when the message actually goes out on the line instead of when Q.931 passes the message to Q.921. Q.921 may have to request a TEI, bring the connection up, or retransmit previous frames before it can actually send the new message. ........ r1929 | rmudgett | 2010-08-30 15:49:11 -0500 (Mon, 30 Aug 2010) | 2 lines Reduced fake MDL-ERROR (Z) message severity to be visible only when debugging enabled. ........ git-svn-id: https://origsvn.digium.com/svn/libpri/tags/1.4.11.4@1949 2fbb986a-6c06-0410-b554-c9c1f0a7f128
libpri: An implementation of Primary Rate ISDN Written by Mark Spencer <markster@digium.com> What is libpri? =============== libpri is a C implementation of the Primary Rate ISDN specification. It was based on the Bellcore specification SR-NWT-002343 for National ISDN. As of May 12, 2001, it has been tested work with NI-2, Nortel DMS-100, and Lucent 5E Custom protocols on switches from Nortel and Lucent. What is the license for libpri? =============================== libpri is distributed under the terms of the GNU General Public License, which permit its use and linking with other GPL'd software only. The GNU GPL is included in the file LICENSE in this directory. As a special exception, libpri may also be linked to the OpenH323 library, so long as the entirity of the derivative work (as defined within the GPL) is licensed either under the MPL of the OpenH323 license or the GPL of libpri. If you wish to use libpri in an application for which the GPL is not appropriate (e.g. a proprietary embedded system), licenses for libpri under more flexible terms can be readily obtained through Digium, Inc. at reasonable cost. How do I report bugs or contribute? =================================== For now, contact the author directly. In the future if there is sufficient interest, we will setup a mailing list. Does anything use this library so far? ====================================== Yes, the Asterisk Open Source PBX does. http://www.asterisk.org Also, the Zapata library has hooks for it. http://www.zapatatelephony.org Special thanks ============== Special thanks to Jim Dixon <jim@lambdatel.com> for his help in testing and fixing the implementation.