A room that will have two sip phones and two analog phones (via fxs gateway) with the same extension number to be able to be called by another extension so that these 4 phones will ring simultaniously with the same number but to also show outside as the same extension number.
Yes you can. Just configure the same extension information on all four phones. If it’s a PJSIP extension you’ll need to make sure that the Max Contacts field on the Advanced tab for the extension is set to at least 4.