If you hope to connect the VC2400A to your sip server, here we assume you use VC2400A-24FXO, and sip server is elastix, many points are very important:
1. before you plug the card, you need to power off the sip server firstly, after you plug the card, you can power on it;
2. the card has 6 ports in total, if you have the splitter, you can plug it to the RJ45 port, then connect the PSTN line to port, and the sequence of the line is like this:
3. when you login the web page of sip server, you can click the hardware detect like this, after that, the card will dispaly as below.
if you plug the PSTN line to the port of splitter, the corresponding FXO will be green.
By the way, if you use Vc2400A-16s/8o, and you donot know which RJ11 port is used to connect the PSTN line or analog phone, you can check the module number beside the module firstly, then find the corresponding RJ45 port.
If the RJ45 port have the FXS modul and FXO module at the same time, you can try to connect the analog phone to the RJ11 port, after that, you can login the web page of elastix, and check if the port is detected.
If the RJ45 port just has the FXS module, you just need to plug the analog phone to the splitter, after that, you can check if the elastix detects it.
If the RJ45 port just has the FXO module, you just need to plug the PSTN line to the splitter, after that, you can check if the elastix detects it.
If you have the splitter from our company, you can refer to the below method: