Nortel Meridian is a private branch exchange telephone switching system.
It provides advanced voice features, data connectivity, LAN communications, computer telephony integration (CTI), and information services for communication applications ranging from 60 to 80,000 lines. Nortel's Meridian PBX telephone system had 43 million installed users globally, making it the most widely used telephone PBXs in the world.
AllVoice provides full maintenance support for Nortel Networks Meridian 1 and CS 1000 phone systems. Despite the discontinuation of manufacturer support for these high end reliable phone systems, AllVoice continues to provide maintenance support for Meridian 1 and CS 1K equipment in following version: Nortel Meridian Option 11C Mini/Chassis and 11C Cabinet, Nortel Meridian Option 51, 61 and 81.