MD5
Posted: October 18, 2003 Quote from RFC 1321 The MD5 algorithm takes as input a message of arbitrary length and produces as output a 128-bit “fingerprint” or “message digest” of the input. It is conjectured that it is computationally infeasible to produce…
Read More »Asterisk readme.channels
Posted: October 18, 2003 Note: This page is work in progress README.channels Channels are named methods by which a leg of a call can be received or transmitted. Specifying a different channel name in a Dial statement allows one to transparently link…
Read More »SIP Compression
Posted: October 12, 2003 SIP and RTP signalling compression is defined in SIGCOMP, RFC 3320. Another, more minor, way of compression is the compact headers, defined in various RFC:s. About this in the SIP RFC 3261: 7.3.3 Compact Form SIP provides a…
Read More »SIGCOMP
Posted: October 12, 2003 From the introduction in RFC 3320: Many application protocols used for multimedia communications are text-based and engineered for bandwidth rich links. As a result the messages have not been optimized in terms of size. For example, typical SIP…
Read More »SIP security
Posted: October 9, 2003 SIP security is a vast and somewhat challenging field. Authentication: Can users steal other users identity? Integrity: Is the SIP message received the same as the one sent? Confidentiality: Is someone else listening on your SIP call setup?…
Read More »Vovida.org load balancer
Posted: October 6, 2003 This project has been taken over by CMSOFAZ.COM. I have updated the project to work with the newest version of asterisk (1.2.7.1), and added the following features. After updating the project I ran it in production for 3…
Read More »SIP method notify
Posted: October 5, 2003 From RFC 2848: During the subscription period, the Gateway may, from time to time, send a spontaneous NOTIFY request to the entity indicated in the Contact: header of the “opening” SUBSCRIBE request. Normally this will happen as a…
Read More »Asterisk libpri
Posted: September 22, 2003 libpri supports PRI, BRI and QSIG News As of libpri 1.4.4 this library now also supports BRI (basic rate interface, sometimes known as ISDN-2) next to PRI. WARNING for 1.4.4 libpri-1.4.4 includes a patch which shouldn’t ever have…
Read More »IEC
Posted: September 22, 2003 IEC (International Electroctechnical Commission) Examples of IEC standards: (quoted from the IEC website) IEC DICT (2002-10) Ed. 5.0 IEC Multilingual Dictionary on CD-ROM The edition 5 of its best selling Multilingual Dictionary on CD-ROM features all parts of…
Read More »SER example forking
Posted: September 19, 2003 SER Example: message forking Example script showing both types of forking; incoming message is forked in parallel to ‘nobody’ and ‘parallel’, if no positive reply appears with final_response timer, nonsense is retried (serial forking); than, destination ‘foo’ is…
Read More »SER example logging
Posted: September 19, 2003 SER logging example $Id: logging.cfg,v 1.1 2003/02/27 20:29:25 jiri Exp $ logging example —————— module loading ———————————- fork=no listen=192.168.2.16 log_stderror=yes debug=3 ————————- request routing logic ——————- main routing logic route{ for testing purposes, simply…
Read More »SER example exec
Posted: September 19, 2003 SER application integration this example shows use of ser as stateless redirect server which rewrites URIs using an exernal utility $Id: exec.cfg,v 1.7 2003/06/03 03:18:12 jiri Exp $ —————— module loading ———————————- loadmodule “modules/exec/exec.so” loadmodule “modules/sl/sl.so” ————————-…
Read More »SER example accounting
Posted: September 19, 2003 SIP Express Router example: accounting calls to numerical destinations $Id: acc.cfg,v 1.3 2003/06/03 03:18:12 jiri Exp $ —————— module loading ———————————- loadmodule “modules/tm/tm.so” loadmodule “modules/acc/acc.so” loadmodule “modules/sl/sl.so” loadmodule “modules/maxfwd/maxfwd.so” loadmodule “modules/rr/rr.so” —————– setting module-specific parameters —————…
Read More »Asterisk tips console
Posted: September 17, 2003 chan_oss tips Hardware phone connected to sound card How to use a modified chan_oss to operate an old POTS (or DECT) phone that is plugged into a sound cord on an Asterisk box See also Asterisk Siemens M20:…
Read More »SIP transports
Posted: September 15, 2003 From the SIP RFC 3261: All SIP elements MUST implement UDP and TCP. SIP elements MAY implement other protocols. Making TCP mandatory for the UA is a substantial change from RFC 2543. It has arisen out of the…
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