Hello, currently I am using Linksys SPA3102 as FXO, but sometimes it does not perform satisfactory (echo, noise and distortions when both parties speaking simultaneously) and more, I am trying to make use of call waiting which I have on my PSTN and it looks like SPA does not support hook-flash command for PSTN line. So now I am looking for better solution - better quality FXO (I am considering Songoma at this point or Mediatrix 1204, but Mediatrix is SIP device and Asterisk, as far as I know, does not support Flash() command for anything else except zaptel - although it is unknown for me if mediatrix supports hook-flash as well) with hook-flash capability.
Can you advise me were should I look for top quality FXO which supported by Asterisk's Flash() command and will be really nice if it can decode visual call waiting signal. I prefer external devices, but open to anything what can serve my needs. Thanks in advance. Regards, Alex
