We use to sell the Avaya Partner ACS Phone System. This is an old digital / analog phone system that was very popular for small business. It was very dominate for small business that needed a simple reliable phone system. This system was great for customer that had simple analog phone lines, digital phones, analog phones, door phones, voicemail, and auto attendant. This system has been install in many business throughout the world. I don’t know whether or not it has been harder to find technician or telecom dealer that can service this system or not, we had quite a bit of end user calling us for support. If your business still have this phone system and needed services such has moving your phone system to a new location, adding a phone, changing the voicemail or auto attendant menu, give us a call, we can help.