A diagrammatic layout of the nodes , interwokring among them and involvment of SIP in the different planes of IMS architecture .
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Telecom R & D- RealTime Transport protocol (RTP) and RTP control protocol (RTCP ) February 25, 2019In a VOIP system, where SIP is a signaling protocol , a SIP proxy never participates in the media flow, thus it is media agnostic. SDP packets describing a session with codecs , open ports , media formats etc are … Continue reading →altanai
- Kamailio DNS and NAT February 2, 2019DNS sub-system in Kamailio To resolve hostname into ips it can do either of below use libresolv and a combination of the locally configured DNS server /etc/hosts and the local Network Information Service (NIS/YP a.s.o) or cache the query results … Continue reading →altanai
- Surajdroid ( Ramudroid v7 Solar Powered ) December 9, 2018Ramudroid is an ingeniously build robot to clean outdoors and alleys inspired by Bharat Swachhata Abhiyaan . Read more Prototype in Development Frame and wheel Algorithm Enhancements Obstruction Detection Stop Operation on Tray Weight reaching threshold Pause operation and take … Continue reading →altanai
- Asterisk December 1, 2018Asterisk is a framework or toolkit designed for VOIP systems . It can support Enterprise communication systems like PBXs, call distributors, VoIP gateways , conference bridges etc . It is open source and free to use . It is developed … Continue reading →altanai
- Opensips Modules July 19, 2018Dispatcher Module This modules implements a dispatcher for destination addresses. It computes hashes over parts of the request and selects an address from a destination set. The selected address is used then as outbound proxy. The module can be used … Continue reading →altanai
- Kamailio Transaction management June 12, 2018Kamailio is basically only a transaction stateful proxy, without any dialog support build in. Here the TM module enables stateful processing of SIP transactions. State is a requirement for many complex logic such as accounting, forking , DNS resolution . … Continue reading →altanai
- Opensips June 6, 2018It is an multi-functional, multi-purpose SIP server especially used in VoIP landscape as standalone SIP server or SBC ( Session Border Controller ) for inbound and outbound traffic by carriers, telecoms backend layers or ITSPs for call routing and trunking … Continue reading →altanai
- Lua Scripts for kamailio Routing May 8, 2018Kamailio uses a native scripting laguage for its configuration file kamailio.cfg . This components of this file are : global parameters loading modules module parameters routing blocks like request_route {…}, reply_route {…}, branch_route {…} etc These parameters including initialization event … Continue reading →altanai
- VOIP Call Metric Monitoring April 17, 2018Metrics for monitoring a VOIP call can be obtained from any node in media path of the call flow . Essentially used for analysis via calculation and aggregation , and sometimes used for realtime performance tracking and rectification too . Rating Factor (R-Factor) and Mean Opinion Score (MOS) are two commonly-used measurements of overall VoIP call quality. R- […]altanai
- Secure Communication with RTP, SRTP , ZRTP and DTLS March 16, 2018With advent of Voice over IP , the real time streaming of data/audio/video also became critically important to be protected from eavesdropping or modification over the open internet. While Secure Real-time Transport Protocol (SRTP) is a profile of the Real-time … Continue reading →altanai
- RealTime Transport protocol (RTP) and RTP control protocol (RTCP ) February 25, 2019
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