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ISDN PRI voice connection

ISDN PRI

A dedicated digital voice connection between your PBX and the Public Switched Telephone Network (PSTN), delivered over our fiber network.

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Salient Features of our ISDN PRI

  • Flexibility in DID range and with reserve capacity for future.
  • Compatible with wide range of PBX systems.
  • 24x7x365 customer care with online tracking of the user queries
  • Cost effective solution with reliability of last mile fiber.
  • Intelligent Call handling.
  • Crystal clear voice communication.

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Have a question or ready to get started? Share your details and our team will get back to you with the right solution for your business.

ISDN PRI services in Pakistan

Vision Telecom’s ISDN PRI service provides up to 30 simultaneous two-way voice channels between your PBX and the public network over a single connection — a reliable, high-capacity solution for businesses with significant call volumes, delivered over our fiber infrastructure.

Key benefits

  • Up to 30 concurrent channels on one connection.
  • Reliable, high-quality voice for busy operations.
  • Works with your existing PBX.
  • Backed by our fiber network and 24x7x365 support.

Handle high call volumes reliably. Ask about ISDN PRI.

Service specifications

FeatureDetails
Channels30 simultaneous two-way voice channels per PRI
ConnectionBetween your PBX and the public telephone network (PSTN)
NumberingFlexible DID (direct inward dialling) range, with reserve capacity for growth
CompatibilityWorks with a wide range of PBX systems
Last mileDelivered over fiber
Support24x7x365 customer care with online tracking of queries

ISDN PRI or SIP trunk?

ISDN PRISIP trunk
Best forPBXs with ISDN interfaces and steady, high call volumesIP PBXs and businesses that want to scale channels flexibly
Capacity30 channels per circuitFrom 1 to hundreds of channels
DeliveryDedicated digital circuit over fiberOver a data connection

How we deliver ISDN PRI

  1. Requirements — call volumes, DID range and PBX model.
  2. Provisioning — fiber last mile and PRI configuration.
  3. Integration — connection to your PBX and number setup.
  4. Testing — all channels and DIDs tested.
  5. Support — 24x7x365 with online query tracking.

More questions about this service

How many calls can one PRI carry?

Up to 30 simultaneous calls in each direction combined.

Can I get more than 30 channels?

Yes — additional PRIs can be added, or SIP trunking can extend capacity.

Will it work with my current PBX?

PRI is compatible with a wide range of PBX systems; we confirm compatibility during setup.

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