Previous internships have included: the Prime Minister's Office (which hosts one intern each semester), foreign embassies, offices of Members of Parliament and Senators, the Ministry of Foreign Affairs, Mitel, World Vision, Make Poverty History, the National Arts Centre, RBC Capital Markets, the Ottawa Citizen newspaper, and a variety of others.
Mitel Corporation designed it in the 1980s as a signaling protocol for its proprietary digital TDM telephone sets.
Point to point SX2000 automated telephone exchanges were installed in ROC headquarters and old fashioned telegraph equipment was replaced with modern computerised message switching equipment.
CounterPath's customers include some of the world's largest telecommunications service providers and network equipment providers including Alcatel-Lucent, AT&T, Verizon, BT (British Telecommunications PLC), Mobilkom Austria, Rogers, SaskTel, Avaya, BroadSoft, Cisco Systems, Metaswitch Networks, GENBAND, Mitel, NTT and NEC.
DPNSS was an active (and successful) collaboration between PBX manufacturers and BT which started relatively slowly (BT & Plessey) but quickly snowballed with MITEL, GEC, Ericsson, Philips and eventually Nortel all joining to create a powerful and feature rich protocol.