Hi NoFate,
Unfortunately I don't have an indoor station so I cannot help with this setup. What I can suggest is to make sure that all devices are on the same LAN - to exclude the NAT traversal problems that usually arise on VOIP systems, Currently I'm struggling with "one way audio" issue of SIP over VPN (wireguard). Also, I recommend to enable debug logging into Asterisk for pjsip module like described on Asterisk PJSIP Troubleshooting Guide (with "pjsip set logger on" you will get an extensive logging and I think can help you in troubleshooting your issue).
To answer your questions (these are my finding - no official documentation found):
1) I'm not sure if linked with a "Room No" or with a "No" (see my previous screenshot). For me both are the same.
2) yes
3) I don't know what you mean by "normal method". I guess (from the UI) you can map to the same "No" or "Room no" more than one SIP extension.
4) Did not tested - but on my todo list. If not work to configure on Hikvision product I expect to find a workaround on Asterisk extensions.conf file.
yeah, all devices are on local lan, testing it now on local lan, so no NAT/firewall are causing issues here
about question 3 : the indoor is linked to the outdoor , not sure now the link is created, probably with some internal SIP , so the outdoor is calling the indoor station by usage of internal sip or something like that...
so if i could configure that the outdoor is calling the indoor with hikvision method and at the same time calling other SIP numbers through our PBX server .... but i dont think its possible
anyway, since you dont have indoor station? you cant use HikConnect ?
i will make some log files now, where i test calling from
outdoor to indoor based on SIP => fails
outdoor to another SIP (linphone) => success
will post later, maybe you can see what the issue is?