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URN etd-0823112-152224 Statistics This thesis had been viewed 2097 times. Download 1674 times. Author Chun-Jen Chen Author's Email Address No Public. Department Communication Engineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 90 Title Implementation of IP-PBX Echo Cancellation on Embedded Blackfin Platform Keyword IP-PBX asterisk blackfin echo cancellation echo cancellation blackfin asterisk IP-PBX Abstract The technology trend of private branch exchange (PBX) for telephony communication has gradually shifted from the traditional time-division multiplexing (TDM) technology toward session initiation protocol (SIP) voice protocol by the network transmission on internet. The advantages of internet voice PBX is not only in the huge cost saving of international communication, but also the reduction of spending in hardware network and remote control investment.
In this thesis, we use the Blackfin series chip BF533 platform provided by the Analog Device to build the Asterisk open source software for internet voice PBX and apply the SiliconLABs FXO/FXS chip solution to construct a complete set of IP-PBX system. The research of this thesis focuses on the simulation and analysis of the echo cancellation effect on the Asterisk IP-PBX in the public switched telephone network (PSTN).
Advisor Committee Ching-Kuen Lee - advisor
Ching-Kuen Lee - co-chair
Shuenn-Shyang Wang - co-chair
Yuan Tzu Ting - co-chair
Files Date of Defense 2012-07-25 Date of Submission 2012-08-23