VOIPNOX

Our services

Everything your voice platform needs

Seven services that cover the whole chain — the routes that carry your calls, the numbers people dial, the PBX that answers, and the security that keeps all of it yours.

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Pay As You Go

UK Tier-1 Voice Routes

Direct Tier-1 UK termination for landline and mobile destinations, carried on premium routes chosen for answer-seizure ratio and audio quality rather than lowest cost. You top up a prepaid balance, send traffic, and pay only for what you actually use — there is no monthly commitment to sign and nothing to cancel if your volumes change.

Trunks are delivered as standard SIP, so they drop straight into Asterisk, FreePBX, 3CX, Issabel or any softswitch you already run. Authentication is by IP or credentials, whichever suits your network.

  • Per-second billing, no rounding surprises
  • CLI passthrough support
  • IP or credential authentication
  • Volume tiers as you grow

Connectivity

UK SIP Trunking

The line into your phone system, carried over the internet connection you already pay for instead of dedicated copper. Your handsets, extensions and numbers stay exactly as they are — what changes is that capacity becomes something you set rather than something you order.

Channels can be resized between months, and with Pay As You Go billing you are charged for the calls you make rather than for capacity sitting idle. Most systems installed in the last fifteen years already speak SIP; we confirm yours before you spend anything.

  • Channels you can change any month
  • Keep your existing numbers
  • Spend caps and fraud alerting
  • Failover destination per number

Migration

ISDN & PSTN Switch-Off Migration

Copper voice lines are being retired across the UK. We inventory every line the building pays for — including the lift phone and the alarm dialler nobody thinks of as a phone — then size the replacement, run it in parallel with the old one, and port the numbers last.

The work itself is not hard; the timing is. As regional stop-sell dates arrive, installers get busier and porting queues get longer, and a job that takes a fortnight planned takes a month rushed.

  • Full audit of every line on site
  • Your PBX checked before anything is bought
  • Old and new running in parallel
  • Numbers ported, never released

Numbering

UK DIDs — Landline & Mobile

Give your business a local presence anywhere in the UK. We supply geographic numbers across all major area codes as well as UK mobile DIDs, delivered over SIP straight into your PBX with routing you control.

Numbers can point at extensions, ring groups, queues or an IVR, with separate out-of-hours and failover destinations so a dropped connection never means a missed call. Bulk allocation is available for contact centres and resellers.

  • Geographic & mobile ranges
  • Failover & out-of-hours routing
  • Bulk allocation for contact centres
  • Porting of existing numbers

On-Premises & Cloud

Asterisk PBX Installation

Full Asterisk deployment on your own hardware or in the cloud, whichever fits your business. We handle the install, dial plan design, extensions, ring groups, queues, voicemail, call recording and reporting — then tune it against real calls rather than leaving you with a default configuration.

Every build is documented and handed over properly, with a walkthrough for whoever will run it day to day. If you would rather we kept managing it, we can do that too.

  • On-prem, VPS or cloud install
  • Dial plan & queue engineering
  • Voicemail, recording & reporting
  • Handover docs and training

Call flow design

IVR Solutions

Menus that get callers where they need to be instead of trapping them. We design and build multi-level IVR, time conditions, holiday routing, announcements, skills-based distribution and voicemail-to-email around how your business actually answers the phone.

If you have professionally recorded prompts we will integrate them; if not, we will help you script and source them so the whole flow sounds deliberate.

  • Multi-level menus & time conditions
  • Professional prompt integration
  • Queue, ring group & overflow logic
  • Voicemail-to-email

Network security

Firewall Installation & ACL Configuration

VoIP systems get scanned within minutes of going live — that is not an exaggeration, it is what the logs show. We install and configure firewalls with tight access control lists, SIP-aware rules and brute-force protection so only your traffic ever reaches your PBX.

Alongside the perimeter work we set destination restrictions and balance-based spend limits, so even in a worst case an incident cannot run away with your credit overnight.

  • ACL & port hardening
  • Brute-force & toll-fraud mitigation
  • SIP-aware rule sets
  • Ongoing rule review

Digital

Web Development

Fast, responsive, search-friendly websites and business portals — built to load quickly, rank well and turn visitors into enquiries. The same team that runs your voice platform handles the hosting and maintenance, so there is nobody to pass the blame to.

Brochure sites, landing pages and customer portals, all built on clean, standards-based code rather than a pile of plugins.

  • Business sites & landing pages
  • Performance & SEO focused
  • Fully responsive builds
  • Hosting & ongoing maintenance

How it works

Live on UK routes in four steps

  1. 01

    Tell us your setup

    Share your PBX, expected volumes and destinations. A quick call is usually enough to scope it.

  2. 02

    Account & trunk

    We provision your account, issue trunk credentials or authorise your IP, and allocate any DIDs you need.

  3. 03

    Top up & test

    Add credit, place test calls with our engineers on the line, and confirm audio, CLI and routing behave.

  4. 04

    Scale as you go

    Send live traffic. Increase channels, add numbers or expand the platform whenever you're ready.

FAQ

Questions about our services

Yes. Our trunks are standard SIP, so they connect to Asterisk, FreePBX, 3CX, Issabel and most softswitches. If you would rather we built and managed the PBX for you, we do that too — on your own hardware or in the cloud.

In most cases yes. Tell us which numbers you hold and who currently provides them, and we will confirm what can be ported and how long it is likely to take before you commit to anything.

Layered: IP authentication on the trunk, firewall ACLs limiting who can reach your PBX at all, brute-force protection on SIP registration, destination restrictions and balance-based spend limits so an incident cannot run away with your credit overnight.

Absolutely. Plenty of customers start with routes alone, or ask us purely for a firewall review. Nothing is bundled by force — take what is useful and add the rest later if it makes sense.

Not sure which pieces you need?

Tell us what your setup looks like today and we will map out the fastest route to clean, reliable UK calling — no obligation.

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