Quantum's ISDN PRI service is a digital telephone service that delivers crystal-clear voice conversations over a T-1 circuit. A PRI can handle up to 23 simultaneous voice conversations and is expandable to hundreds of conversations by adding additional T-1 circuits. ISDN PRI also enables Direct Inward Dialing, which will allow the assignment of unique telephone numbers to individuals within your organization to efficiently route calls directly to their destination without having to first go through a receptionist or auto attendant. Quantum's PRI service also includes Calling Number w/ Name.

Key Features:

  • Unlimited Local Calling
  • Competitive Long Distance and International Rates
  • Superior Voice Quality
  • Efficient Call Routing
  • Direct Inward Dialing
  • Calling Number w/Name
  • Available anywhere in the Baltimore area

Quantum has locations in Carroll County and Baltimore Maryland!










facebook logo


Use of Quantum's services, systems, servers, and facilities, constitutes the customer's agreement with Quantum's Rules and Regulations, and the Quantum Service Agreement, both of which are subject to change without notice.

┬ęCopyright 1995-2021 Quantum Internet Services, Inc., ┬ęCopyright 1995-2021 Quantum Telecommunications, Inc. All Rights Reserved.