We are trying to find out what options/features need to be enabled on an S8500 with Com Mgr. 3 to have NFAS with backup (meaning if the primary d-ch goes down a second own takes over).
Expertise in Avaya, Rolm/Siemens, Mitel, Nortel, NEC, Alcatel, Toshiba, Aspect, Ericsson, Executone, Panasonic PBXs & KSUs