How to configure Reliance Jio SIP trunk on asterisk
Reliance Jio provide SIP E1 trunks with DIDs . For old PBX they give you SIP to E1 converter which give you RJ45 connector to connect your E1 port.
Jio put a fiber cable and terminate on ONT from there they provide a network CAT 6 cable to put in to your network switch or directly to your IP PBX network interface not E1 interface .
Reliance jio provide SIP E1 trunk on there own IP address which will be configured on your asterisk server or Grandstream UCM or any IP IPBX .