I am trying to use my old SPA3000 to connect PSTN line and voip line. It works ok with the following dialplan:
But there is a problem: the dialout (e.g. 501) for voip takes 15 seconds to reach out the voip proxy server, even putting # after the number not working, while the gw0 (pstn) can go out without delay. It seems that S0 or # after dialed number is not effective for voip calls. Can anyone know what is the cause for the delay of voip calls while no problem for pstn calls? Anyway to solve this problem? Thanks a lot in advance.