The Department of Telecommunications (Telecom), formerly the Municipal Telephone Exchange (MTE) provides telephone services to all city agencies. Our services include managing Voice over Internet Protocol, or VoIP phone service, supplying mobile phones, providing technical support for various city call centers, and providing for the billing of these services with external vendors. Telecom installs and maintains all telecommunications equipment in the various Baltimore City call centers such as 311, Department of Public Works (DPW), and Revenue Collection.

The Department of Telecommunications runs the City Hall call center, the one-stop-shop to connect residents with City agencies and elected officials.