Good day to you all! I'm quite new to 3CX and I'm trying it out for our group. I've got all things working except for the gateway part. I have a linksys SPA3102 as a gateway PSTN. I hooked it to our company's trunkline. I can see the voltage is around -24v and loop current is 0. When I'm doing outbound calls i get an 503 Service unavailable error. In my mind I got 3 suspects. First is the dial plan. (S0<:995>) this is what I placed knowing the the authentication ID is 995. I'm not sure if I understood the config right. Second is the Line in use voltage. I'm not sure how to determine this as well as the Operational loop current. My third suspect is whether there's a problem with the actual line. I would really appreciate all your help. Thanks in advance.