I setup CME and unity connection for a retirement community. At the time of the setup, this was only for the "business entity", not the residents that live in the community. The phone system the residents use is an old digital system that is on its last legs and they can't get parts for it anymore. They asked if I can put them on the Cisco system. They want to continue to use their 2 wire phones, no Cisco IP Phones for the residents. There would be about 50 analog phones for me to connect. They do not have CAT5 ran to all the resident rooms, just standard wires for a regular phone, which all run to a dmarc. At the Dmarc could I install an analog gateway to attach these 50 phones, and then assign them their same DID number once I port all the numbers from their old phone system to the Cisco?