Other Telephony Services

Business-grade telephony at competitive rates

Standard phone lines and ISDN circuits still have their uses for many businesses.

hSo’s traditional phone services offer great value, and make it easy to switch to VoIP when you’re ready.

Why choose hSo for telephony services?

Lower call charges

We use carrier pre-selection (CPS) to save you money on your calls.

Wide choice of phone numbers

Our range of geographic and non-geographic numbers includes 0845 and 03xx to aid your marketing

Reduce your line rental

Whether you have standard phone lines, an ISDN2 circuit or an ISDN30, we can cut their costs.

24/7 UK Support

Our totally UK-based telephony specialists are there for you at any moment.

Single bill

We can give you a single bill to all your sites. However, if you prefer, we can bill your various divisions separately.

Keep your numbers

Typically, we can port your existing numbers when you switch to hSo.

Additional Benefits

Telephony and infrastructure expertise

We’ve been providing phone services for more than 10 years. We can integrate other telephony services and network technologies into your communication solution.


With hSo, you get a single point of contact for all your sites and a single bill.

Triple reassurance

The processes used by hSo are regular checked by auditors for Quality (ISO 9001), Information Security (ISO 27001) and IT Service Management (ISO 20000).

hSo’s guide to Business Phone Systems

Our FREE guide provides...

  • An overview of Business Phone Systems
  • 6 major decisions you need to make
  • Tough questions savvy buyers ask
“hSo provide us with a PSTN line and ADSL fall-back service for the rare occasions our primary fibre is unavailable. The fail-over is automatic... As with our primary fibre, the PSTN has been a matter of ‘set it and forget it’, leaving me free to concentrate on other areas of the business.”
Roland Corbet,

Technical Manager, Cyber Media

Get in touch

 020 7847 4510


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Contact us

    • Head Office:
    • hSo, 50 Leman Street, London, E1 8HQ
    • Switchboard:
    • 020 7847 4500