My name is Joe Lourenco and I work for C & C Technologies, currently on assignment in Brazil. My predecessor installed Elastix Asterisk, and did the config via the GUI. We are running a HP server with an E1 card. No other services run on this server. Our phone provider is Embratel, and my predecessor made an effort to move onto OI. TIM is also in Brazil, but I am not familiar with quality of any of them. FYI, unfortunately, phone and internet service in brazil is still precarious because, 1. still developing, and 2. people steal the copper cables, and other nonsense. Anyway , I am having huge problems with the Quality of Service in the phone calls (VoIP). International phone calls are dropping, and when they go through, ECHO begins with Buzzing that both parties can’t hear each other correctly at all. Restarting the server helps, but only temporarily.
We are currently working on rebuilding our systems to use full asterisk, without Elastix. However, for the time being, what could be causing the problem? The card? Any misconfiguration somewhere? Anyone experience this type of problem? Or is it the phone company? Any suggestions to begin with would be a great starting point.