I'm starting a project of VoIP using a SPA9000 as the PBX, with SPA400 for voice mail and for gateway to PSTN line to my carrier
I will probably use after that the WAN connectivity of the SPA9000 in order to have some call via internet
more of this I will have at the end of the project around 13 ip phone SPA942
Is it possible bby using a analog port on the SPA9000 to connect to it a SIM box for mobile phone calls?
With this installation, I want to have capability of call transfert, call on hold, call conference between one external number and a lot of inside extension, internal call ( maybee with directory usage ). call restriction for some extension is a nice to have feature.
Is it also possible to add on this architecture a video system in order to see who is coming to the door when pushing the ringing button of the buidling?
Thanks in advance for your feedback about each question?