SpanDSP is a library of DSP functions for telephony, in the 8000 sample
per second world of E1s, T1s, and higher order PCM channels. It contains
low level functions, such as basic filters. It also contains higher
level functions, such as cadenced supervisory tone detection, and a
complete software FAX machine. The software has been designed to avoid
intellectual property issues, using mature techniques where all relevant
patents have expired. See the file DueDiligence for important
information about these intellectual property issues.
from Brad; tested with his work-in-progress CallWeaver.
IAXmodem is a software modem written in C that uses an IAX channel
(commonly provided by an Asterisk PBX system) instead of a traditional
phone line and uses a DSP library instead of DSP hardware chipsets.
IAXmodem was originally conceived to function as a fax modem usable
with HylaFAX, and it does that well. However IAXmodem also has been
known to function with mgetty+sendfax and efax.
.. much cleanup from my earlier verisions, thanks brad@
in RTP codec payload type handling) and AST-2008-003 (SIP channel
can make a call into the context specified in the general section
of sip.conf). Affects all Asterisk users with SIP enabled.
This is a security update only, no changes other than these fixes.
pjsua is an open source command line SIP user agent that is used as
the reference implementation for PJSIP and PJMEDIA. It has many
features, such as:
* Mutiple identities/account registrations
* Concurrent calls and conference (unlimited number, but only up
to 254 sources can be mixed to a single destination)
* Call features: call hold, call transfer (attended or unattended,
with or without refersub).
* SIP Presence/SIMPLE with PIDF and XPIDF support. PUBLISH support.
* Instant messaging and message composing indication
* DTMF digits transmission/receipt (RFC 2833)
* WAV file playing, streaming, and recording.
* Accoustic echo cancellation (AEC).
* Auto-answer, auto-play file, auto-loop RTP
* Support SIP UDP, TCP, and TLS transports. Support for DNS SRV
resolution.
* NAT traversal with rport and STUN.
* Tone generation.
* Codecs: PCMA, PCMU, GSM, Speex (including wideband/16KHz and
ultra-wideband/32KHz), L16 (8-48KHz, mono or stereo), and iLBC.
* Adaptive jitter buffer, adaptive silence detection, and packet
lost concealment audio features.
With lots of testing and help from todd@, sthen@, jakemsr@, jolan@ and
Benny Prijono.
ok todd@ sthen@
fixes an overflow in IMAP voicemail storage reachable by anyone who can
send email to a VM box accessed from the phone. AST-2007-022, found by
sprintf audit.
ok ian@
Net::SIP consists of packages for handling SIP packets, for transport
of packets, for processing packets and on top of all that a simplified
layer for common tasks.
ok sturm@
Ohphone is a fully functional H.323 endpoint command line application
that can be used to listen for incoming H.323 calls, or to initiate a
call to a remote host. It includes a simple menu that allows
interactive control of functions, as well as allowing control of most
dialing and answer functions via a phone handset.
ok kili@
