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Business Telephone Services

Cost-effective and scalable
the only multiple communication channel solution your business needs.

Scalable telephone services with Maxis ISDN PRI

Increasing available lines to handle large call volumes can be costly, especially for a business that’s expanding.

With Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI), you can enjoy a circuit of 2Mbps bandwidth
with 30 voice channels to handle a higher number of calls at any time.

Highly scalable and affordable, this digital network seamlessly connects your Private Branch Exchange (PABX),
Media Gateway and video conferencing equipment to a public switch telephone or IDD network with just one line.

Seek for help from our representatives today and give your business the competitive edge without paying a fortune.

Excellent connection

Excellent connection

Always providing a fast, flexible, highly reliable and clear digital connection.

Increased call capacity

Increased call capacity

More calls answered means better customer satisfaction; effectively enhancing your business growth.

Highly scalable

Highly scalable

Choose how many trunks you require; the ISDN PRI can be tailored to match your every need.

Cost saving

Cost saving

Cheaper than subscribing to direct single lines or pilot hunting lines; set up to 100 physical telephone lines at affordable rates.


Multi-line Hunt Group

Multi-line Hunt Group
You don’t have to wait for a line to use. Your calls are connected to your extension via the first available channel line.

Direct Inward Dialing

Direct Inward Dialing
Using the last four digits as the extension number, callers can reach anyone directly without going through a telephone operator.


Choose your preferred Default Pilot Number from the block of numbers that you have subscribed to. Use it as a primary number and for billing purposes.

How it works

The Primary Rate Interface (PRI) is a service standard for larger companies within the Integrated Services Digital Network (ISDN)
set of specifications. ISDN PRI uses circuit-switched access technology to deliver high-quality voice, data and video services over
a high-bandwidth network. Maxis Switch and Network are connected with ISDN PRI via modem to customer's PABX.



Let's talk business

Got an enquiry on any of our Business Solution? Contact our representatives at 1800-82-1919 or leave your contact details with us and we'll call you.

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Frequently Asked Questions

How is ISDN PRI delivered?

ISDN PRI is delivered over a single physical trunk with the digital interface of a 2Mbps circuit with 30 voice channels that is connected to a Maxis modem via the RJ45 copper wire.

How are telephone numbers provided for ISDN PRI service?
Telephone numbers for ISDN PRI service come in blocks of 100 numbers. We provide up to 200 telephone numbers per ISDN PRI trunk.

How will ISDN PRI service be billed?
ISDN PRI service is billed by the pilot number (only one telephone number) whether the service has one trunk or multiple trunks attached to this number.

How does ISDN PRI connect calls to customer's PABX?
Incoming calls are connected based on the 1st available channel and directly to the telephone number (which may be an extension) (bypass reception) being called.

What are ISDN PRI value-added features or supplementary services?

  • The ISDN PRI features include a FREE Clip-on Extension (full extension telephone shown to caller) OR a Clip on Pilot Number (only pilot number shown to caller).
  • Supplementary services such as the Domestic Toll-Free (Freefone 1800 or Localfone 1300) and International or Universal Freefone service can also be added.
  • For business contingency or redundancy purposes, trunk redirection service can be subscribed in advance to divert incoming calls to an alternative service when your ISDN PRI service or PABX is not functioning.

What does Maxis provide at the customer's premises?
ISDN PRI is connected to the Maxis network via modem using RJ45 cable. It does not include customer equipment (PABX, telephone). Customers must purchase their own PABX with installed ISDN PRI card in their PABX and PABX extension phones for their staff or call centre agents.