I am sure most people did not yet know that there was a bruja de SIP,
let alone a bruja de SIP del GNU...
SIP Witch is an official package of the GNU Project as of August 10th
2007. GNU SIP Witch is also part of GNU Telephony & the GNU Telecom
subsystem.
GNU SIP Witch is a call and registration server for the SIP protocol. As
a call server it services call registration for SIP devices and
destination routing through SIP gateways. GNU SIP Witch does not
perform codec operations or media proxying and thereby enables SIP
endpoints to directly peer negotiate call setting and process peer to
peer media streaming even when when multiple SIP Witch call nodes at
multiple locations are involved. This means GNU SIP Witch operates
without introducing additional media latency or offering a central point
for media capture.
GNU SIP Witch is designed to support network scaling of telephony
services, rather than the heavily compute-bound solutions we find in use
today. This means a call node has a local authentication/registration
database, and this will be mirrored, so that any active call node in a
cluster will be able to accept and service a call. This allows for the
possibility of live failover support in the future as well.
GNU SIP Witch is not a SIP "router", and does not try to address the
same things as a project like iptel "Ser". GNU SIP Witch is being
designed to create on-premise SIP telephone systems, telecenter servers,
and Internet hosted SIP telephone systems. One important feature will
include use of URI routing to support direct peer to peer calls between
service domains over the public internet without needing mediation of an
intermediary "service provider" so that people can publish and call sip:
uri's unconstrained. GNU SIP Witch is about freedom to communicate and
the removal of artifical barriers and constraints whether imposed by
monopoly service providers or by governments.
Resources for supporting GNU SIP Witch will be consolidated and handled
principally through Savannah using the existing GNU Telecom subsystem
project found there (https://savannah.gnu.org/projects/gnucomm) as a
central point of contact. This sub-project is being reorganized for this
purpose.
GNU SIP Witch depends on the UCommon library, which may merge with and
become GNU Common C++ 2.0 early next year. CVS for and new
distributions of UCommon will be found in the GNU Telecom project on an
interim basis until then. GNU SIP Witch also uses libeXosip2 and GNU
oSIP, and these may be found at their respective sites. GNU SIP Witch
is licensed under the GNU General Public License V3 or later.
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