Primary Rate Interface (PRI)

Primary Rate Interface is a 30 Channel ISDN (Integrated Services Digital Network) link for voice communication with 2 channels for data. Primary Rate Interface (PRI) provides virtually unlimited number of ‘pairs’ at customer’s office for growth of their business.

The service uses the public telephone network to carry an all-digital signal that can satisfy your voice and data communication needs in the most efficient and flexible way possible. This gives you 30-40% greater efficiency than traditional analog service. Fewer connections are required and call connection is rapid, thus saving customers time and money.

PTCL’s PRI service is ideal for Carrier grade customers that require simultaneous transmission of voice, data & video as well as cost efficiency.


  • A combination of voice and data communications with scalability
  • Re-allocation of capacity at any time


  • Cost Effective
  • Dual Communication (Data & Voice)
  • Good option for backup connectivity