I have a client that is looking to have 50 users local to the LAN and those same 50 users have an 881 router at their home office with VPN back to main office. They want to use the FXS port for a cordless device and have the same extension as their desk phone at Corp. Is this possible for either solution utilizing hardware VPN and the FXS ports in the 881 series router at a home office? I got different answers whether or not this would exceed the 20 remote site locations but I do not believe so since this is a hardware VPN connection? I already thought of Single Number Reach so that my remote office rings at the same time?
I am looking for the best and easiest solution on this.