nolram Posted January 6, 2006 Report Share Posted January 6, 2006 hello everyone! i need to search for any pbx/pabx projects in the web, but i could hardly find any...i need ur help, pls help me find web links to projects that i can try...thanks. :D Quote Link to comment Share on other sites More sharing options...
gogo2520 Posted January 7, 2006 Report Share Posted January 7, 2006 Sorry I can't help you I don't even know what pbx/pabx is. What are they? gogo Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 7, 2006 Report Share Posted January 7, 2006 Hi Nolram,I installed, programmed and fixed pbx and key telephone systems.The very old ones used stepper switches and were simple. The last key systems I worked on in the '80's used a processor in each phone, on each card then an overall processor.Customers' offices were used as beta test sites for new models and they frequently messed-up.One new model had an intermittent system reset, dropping all connections. I discovered that it occured when an incoming call rang a line at exactly the same time someone used that line to call out. The Japanese engineers couldn't reproduce the problem in Japan, so came over here to see how I do it! They still couldn't get the timing syncronised like me.Those systems were 20 years ago and were very sophistocated. Modern systems are even more integrated, using ICs designed for them. I don't think a single person could design one, it would take a team of emgineers.In the '90's I installed, programmed and fixed tele-conferencing systems, working for a manufacturer. Some systems used thousands of telephone lines and were controlled by pc's. The systems were also extremely complicated and used custom-made parts and dsp.Even simple little full-duplex speakerphones and boardroom tele-conferencing systems had custom-made parts and a program for their dsp. Defective ones weren't repaired, they were thrown away. ;D Quote Link to comment Share on other sites More sharing options...
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