Departmental Telephone and Messaging Systems, Voice Alarms, and Wireless Communications https://www.international.gc.ca/transparency-transparence/information-privacy-information-protection/assessment-evaluation/telephone_telephonie.aspx?lang=eng
DFAIT represents Canada worldwide through a network of embassies, consulates and diplomatic offices.
voice traffic is also sent “in the clear” and is not encrypted through an Internet Protocol Security tunnel