Telephony Manager Servers and Other Applications Which Connect to The Nortel Pbx., Telephone System Upgrades, System Design, Nortel PBX Systems, Nortel PBX Support, Nortel PBX Installation and Maintenance., Option 11c Through 81c and Cs1000 Along With Callpilot Servers Release 2.02 Through Release 5.0, Nortel Legacy PBX Support, Installation, Consulting Services and Data Base Gathering.