Service Descriptions

EIS Service Offerings

  • Circuit-Switched Voice Service (CSVS)
  • Circuit-Switched Data Service (CSDS)
  • Toll Free Service (TFS)
The Capitol building
Mission-Critical Solutions 

Leading From The Front

Businesswoman using tablet and headset in the office.

Customer Support Service

Live customer support through Granite’s U.S. based call center to assist each and every customer. Our customers are important to us and your call is answered within 10 seconds by a live representative.