Telephony that doesn't require a server room.
Cloud-hosted PBX, SIP trunking, contact-centre tooling, and Microsoft Teams direct routing - all on the Boundless network so voice quality is engineered end to end, not handed off three times before it reaches you.
On-prem PBX is end-of-life. So is the team that knew how to run it.
ISDN switch-off, ticking
Your last ISDN30 retires in months. The retail telco wants to upsell you their calling plan at 4× the SIP rate. Your hand is being forced.
Microsoft's calling plans
Teams is great. Microsoft's telephony pricing is not. Per-user per-month for outbound calls you used to pay pennies for.
Voice quality nobody owns
Your call breaks up. Whose fault - the laptop, the WiFi, the SBC, or the carrier? Three vendors, three shrugs.
Voice as one product, on one network, on one bill.
01Direct routing into Teams (or any softphone)
Keep Teams as the front end. Bypass Microsoft's calling plan with SIP rates that are an order of magnitude cheaper.
02Engineered end-to-end on our network
Voice prioritised at the access layer, on our SIP backbone, into your PBX or contact centre. Quality nobody can fingerpoint away.
03Numbers, queues, and IVRs in days
Port-in, hunt groups, contact-centre queues, wallboards, and call recording - provisioned from a console, not a procurement cycle.
What we'll commit to in writing.
Every line below appears in the contract, the SLA, or the SoW. Nothing on this page is marketing-only.
Cloud-hosted PBX
Full-featured PBX with auto-attendants, hunt groups, voicemail-to-email, and call recording.
SIP trunking
Resilient SIP trunks with geo-redundant routing and instant DDI provisioning.
Teams direct routing
Native PSTN calling inside Microsoft Teams without renting Microsoft's calling plans.
Contact-centre tooling
Queues, IVRs, skills-based routing, wallboards, and live + historical reporting.
Number portability
Port in your existing geographic and non-geographic numbers - UK, EU, and international.
Carrier-grade voice quality
Voice prioritised across the network; QoS enforced on the access side too.
From first conversation to running estate.
Discover
We map your number ranges, call flows, contact-centre queues, and any existing PBX or Teams estate.
Design
Hunt-group, IVR, and direct-routing design; failover SIP trunks; QoS marking strategy across access circuits.
Deliver
Bulk number port-in with zero ring-down. Cutover rehearsed in pre-prod before going live.
Run
Live call-quality dashboards, monthly minute-usage reporting, and a named voice engineer on every account.
Numbers we'll show you on month one.
"We kept Teams. Boundless quietly replaced Microsoft underneath. The CFO noticed the bill, the users noticed nothing."
What 'real' looks like for hosted voice.
Three things we can put on the table in a first conversation. No NDAs required to see the numbers - only to name the customer.
Professional services firm, 2,400-seat migration
Teams Direct Routing certifiedReplaced an end-of-life on-prem PBX and Microsoft Calling Plans estate. Kept Teams as the front end. CFO saw a 65% drop, users saw nothing.
MOS 4.4, end-to-end measured
Carrier-grade voiceMean Opinion Score across the customer base sits at 4.4 - measured continuously from handset to PSTN, not a one-off lab number.
ISDN-switch-off ready
Ofcom-regulated portingPre-baked migration playbook for every UK ISDN30 / PSTN cut-off date. Number ports complete in <5 working days, no ring-down.
Used in production by teams who can't afford a leak.
Distributed teams
One number plan across home workers, branches, and contact centres.
Microsoft shops
Keep Teams as the front end, swap out expensive Microsoft calling plans for ours.
Customer service ops
Spin up a contact centre in days with reporting your QA team will actually use.
A 24-month rolling term, and one promise about price.
Business engagements run on a 24-month commercial term that auto-renews for another 24 months at the end of each cycle, unless you give 90 days' notice before the renewal date. Within each term the only price movement you'll see is a once-a-year adjustment strictly capped at the published UK CPI inflation rate - no margin added on top, ever.
24-month rolling term
Standard B2B engagement length, with longer multi-year terms available for larger estates. The contract auto-renews for another 24 months at the end of each term unless you give 90 days' notice before the renewal date.
Index-linked, never inflated
A single annual adjustment on your contract anniversary, capped at the published UK CPI inflation rate. We don't add a margin on top - the index is the absolute ceiling, in writing.
No surprise charges
Flat unit pricing for the term. Out-of-bundle events get a heads-up before they hit a bill - never a footnote you discover at month-end.
Terms summarised in plain English - full clauses live in the Master Services Agreement and the per-service Statement of Work.
See hosted voice & unified communications on your own estate.
Tell us a little about your setup. We'll confirm a 25-minute walkthrough within one business day - and our CRM will draft a tailored follow-up so the conversation starts where you left it.
See Hosted Voice & Unified Communications on your own estate.
Tell us a little about your setup. We'll set up a 25-minute walkthrough on the part of hosted voice & unified communications that matters to you most - and you'll be talking to someone properly senior, not an SDR.
- Reply within one business day
- Tailored to your sector and scale
- No pre-call qualification gauntlet
The questions every buyer asks.
Don't see yours? Ask us directly - we answer technical questions with technical people.
Ask a specific questionPairs well with the rest of the Boundless stack.
Beat the ISDN switch-off and the Microsoft bill.
Tell us your number ranges and Teams footprint. We'll design Direct Routing, port your numbers in under 5 days, and cut your voice spend ~65% - with MOS 4.4 measured.