MCLEAN, Va., May 29, 2008 – Global Telecom & Technology, Inc. (“GTT”), (OTCBB: GTLT), a leading global Multi-Network Operator (“MNO”), today announced that Muzicall, the London-based telephone Ring Back Tone service provider, has signed an agreement to extend its GTT-provided network infrastructure throughout Europe.

As a leading provider of music-based ring tone services to operators and media companies across Europe and around the world, Muzicall chose GTT to help expand their network reach to new markets in continental Europe.  GTT will extend and interlock Muzicall’s European network with the local phone providers to provide innovative enhancements to traditional voice dial tone service. Muzicall currently relies on GTT to manage and interconnect their VPN-based network to sites in Amsterdam, Portugal and India.

In addition, GTT will provide Muzicall with a fully managed network service solution, including VPN network deployment, co-location, IT engineering, and ongoing network consulting support. These services are in addition to the Network Operations Center support that GTT provides to Muzicall under its current contract.

The breadth of the support we are providing to Muzicall shows our true value as a Multi-Network Operator,” said Richard D. Calder, Jr., GTT’s president and CEO.  “GTT’s multi-carrier, multi-technology approach enables us to deliver tailored network solutions to our customers in ways that no individual facilities-based carrier can.”

About GTT

GTT is a global network integrator that provides its clients with a broad portfolio of wide-area network and wireless mobility services. With over 800 worldwide supplier relationships, GTT combines multiple networks and technologies to deliver cost-effective solutions specifically designed for each client's unique requirements. GTT enhances client performance through our proprietary systems, comprehensive project management and 24x7 operations support. Headquartered just outside Washington, D.C. in McLean, Virginia with offices in London and Dusseldorf, GTT provides service to more than 300 enterprise, government, and carrier clients in over 70 countries, worldwide. For more information visit the GTT website at www.gt-t.net