Multi-Site Telephony Consolidation: The Real Numbers Behind 4 UK and Ireland Rollouts

Key Takeaways

• Four UK and Ireland businesses, Norwich Theatre, Dental Tech, Seths Estate Agents and IPS Fire & Security, consolidated multi-site telephony onto cloud platforms, and each case study is a useful example of what actually changes operationally, and worth reading with a genuinely critical eye rather than taking every stated number at face value.
• Norwich Theatre’s case study frames its migration as racing “the UK’s ISDN switch-off deadline approaching by the end of 2025.” That date is outdated: Openreach delayed the national PSTN switch-off from December 2025 to 31 January 2027 back in 2023, and has since stated that date is final. Worth correcting rather than repeating.
• Dental Tech is described as “a leading Irish dental technology provider,” which matters for how its story should be read alongside the other three: Ireland’s switch-off, run by Open Eir under ComReg, follows a phased, exchange-by-exchange rollout tied to fibre availability rather than the UK’s single fixed national deadline, so Dental Tech was never actually racing the same clock as the other three companies here.
• Seths Estate Agents’ own case study contains an internal inconsistency worth flagging plainly: it states the agency “operates from two sites” in one sentence, then describes “full fibre broadband across all three sites” a few sentences later, alongside “12 staff and 19 users,” another mismatch worth a reader noticing rather than smoothing over.
• Seths Estate Agents’ new system delivers “99.9 percent uptime,” a real and meaningful figure, but worth translating precisely: 99.9% uptime permits roughly 8.76 hours of downtime a year, about 43.8 minutes a month, a genuinely different picture from “always on,” and useful context for any board about to sign a similar SLA.

Multi-site telephony consolidation case studies tend to get read the same way: company had a problem, company fixed it, company reports a good number. That’s a reasonable first pass, but four real examples here reward a closer read, because between them they contain an outdated regulatory deadline, a geography mismatch, an internal numbers inconsistency, and a strong statistic worth translating into what it actually means. None of that undermines the underlying value of what any of these four businesses did. It’s exactly the kind of detail a UK C-suite should be checking before treating any single case study, including a strong one, as a template to copy.

Norwich Theatre: real result, outdated deadline

Norwich Theatre, which operates three venues, Theatre Royal, Norwich Playhouse and Stage Two, presenting a wide range of performances across multiple departments, was running an ageing telecommunications system plagued by reliability and functionality issues, with the UK’s ISDN switch-off deadline approaching by the end of 2025, according to the case study. VoiceHost deployed a cloud-based Hosted PBX system, removing the need for on-site hardware entirely, and added a desktop application, wallboards, IVR and conference calling, backed by 24/7 support and Snom D120 and D713 handsets. “Updating our telecommunications system has led to a host of benefits, all at a cost-effective rate,” said Matthew Johnston, Head of IT at Norwich Theatre. The new system has improved uptime and redundancy, moved the theatre onto a simplified per-user, per-month pricing model for easier budgeting, and freed the IT team to focus on strategic work rather than maintaining ageing on-site hardware.

The one correction worth making plainly: the “by the end of 2025” framing reflects Openreach’s original PSTN switch-off target, which the company delayed back in 2023, moving the UK-wide date to 31 January 2027, a date Openreach has since described as final. That doesn’t change anything about the value of Norwich Theatre’s migration, moving off ageing on-premises hardware onto a modern hosted system was worth doing regardless of the exact regulatory date. But a reader using this case study to gauge their own urgency should work from the current 2027 date, not the superseded 2025 one, particularly given how much runway that difference actually represents for a multi-venue rollout.

Dental Tech: a genuinely strong result, in a different regulatory race entirely

Dental Tech, a leading Irish dental technology provider with 35 employees across four clinics and one laboratory facility, was running a VoiceStack phone system integrated with its CareStack CRM, but the setup delivered poor call quality, missed calls, inconsistent routing between sites, and difficulty directing callers to the right department, all while costing more than the business wanted to pay. The VoIP Shop deployed a fully managed Yeastar Cloud Phone System across all five locations, with advanced call routing and flow design, call recording and live wallboards, Irish SIP trunks for inbound and outbound calling, reuse of Dental Tech’s existing handsets, and number porting completed the next working day with zero downtime. “We loved the new phone system trial in our first clinic and quickly made the decision to roll it out across all our other sites. The migration was seamless, and the system simply works,” said Olga Popova, Head of Marketing and Sales at Dental Tech. The switch cut Dental Tech’s monthly telephony costs by 75% compared with VoiceStack, eliminated the routing and transfer issues that had frustrated callers, and consolidated management of all five sites onto a single platform.

This is a genuinely strong, well-documented result, and it’s worth reading in its correct context rather than folding it into a UK ISDN-deadline narrative alongside the other three companies here. Ireland’s own network transition, run by Open Eir and regulated by ComReg, doesn’t follow a single fixed national cutoff the way the UK’s Openreach-led process does; it moves exchange by exchange as fibre becomes available locally, with affected businesses given 12 to 18 months’ notice once their specific exchange’s countdown starts. Dental Tech’s motivation, poor call quality and high cost, was entirely sufficient reason to migrate on its own. It just wasn’t the same regulatory clock the other three UK businesses in this piece were racing, and a board reading this case study for ISDN-deadline urgency specifically should know that distinction.

Seths Estate Agents: strong numbers, one to double-check and one worth translating

Seths Estate Agents, a family-run estate and letting agency in Leicester with more than 50 years in the local property market, operates from two sites with 12 staff and 19 users, but its legacy analogue phone system couldn’t route calls between offices, leaving customer enquiries missed whenever one site got busy. Per-call billing also made monthly costs unpredictable, and field staff had no way to work remotely. The VoIP Shop replaced the analogue setup with a Cloud PBX system featuring an IVR menu with automatic call overflow between sites, Busy Lamp Field visibility of staff availability, full fibre broadband across all three sites with managed routers, Polycom IP handsets for all 19 users, mobile app access for field staff, and number porting that preserved the agency’s existing phone numbers. “Since moving to The VoIP Shop, we’ve had a much more reliable phone system across our sites. Calls no longer get missed even when one office is busy, and it’s reassuring to know our costs are fixed each month,” said Anish Popat, Director of Seths Estate Agents. The new system delivers 99.9% uptime, fixed monthly costs in place of unpredictable per-call billing, and significantly fewer missed calls thanks to inter-site overflow routing.

Two things worth flagging plainly, in the spirit of not repeating a source’s numbers uncritically. First, the case study itself is internally inconsistent about how many sites are actually involved, “operates from two sites” in one place, “full fibre broadband across all three sites” a few sentences later, alongside a 12-staff, 19-user headcount that doesn’t resolve the discrepancy either way. That’s not necessarily wrong, a growing agency might genuinely have added a site between the start of the relationship and the fibre rollout, but the case study as written doesn’t explain it, and a reader shouldn’t quietly assume it away. Second, and more useful for any board reading this as a benchmark: 99.9% uptime is a real, meaningful commitment, and it’s worth translating into what it actually permits rather than treating it as shorthand for “always on.” Standard “three nines” math puts 99.9% uptime at roughly 8.76 hours of permitted downtime a year, around 43.8 minutes a month. That’s a genuinely strong SLA figure for a small multi-site business, and also a specific, finite number worth knowing before assuming a cloud telephony system will never go down.

IPS Fire & Security: the cleanest of the four

IPS Fire & Security had outgrown its legacy PSTN-based PBX system. The setup couldn’t separate call destinations properly, wouldn’t support the kind of complex IVR routing a growing security business needed, made it awkward to transfer calls between staff, and failed to display the correct outbound number to customers. TTNC moved IPS Fire & Security off the old PSTN setup and onto a Cloud PBX platform running over VoIP, including Yealink IP desk phones pre-configured for plug-and-play deployment, CRM integration and porting of the company’s existing numbers. “Can’t rate these guys highly enough. We have been using them for many years now and honestly can’t think of any faults or any issues we have had with them,” said Noah Searle, IT Manager at IPS Security. With the new system in place, IPS now displays its main office number on every outbound call, routes incoming calls through IVR to the right department automatically, and tracks communications in real time, with the old handset and line restrictions gone and predictable monthly costs in place of upgrade and maintenance fees.

Of the four case studies here, this is the one with the fewest loose threads: no outdated deadline framing, no geography mismatch, no internal inconsistency. It’s also, notably, a company whose own business is fire and security, where call routing reliability, the right outbound number displaying correctly, IVR getting a customer to the right person, carries a slightly sharper edge than it would for most businesses. That context is worth keeping in mind when comparing the four: the same technical fix means something different depending on how much an organisation’s core function depends on the phone actually working correctly the first time.

What a UK C-suite should actually take from reading four of these side by side

None of the four companies profiled here did anything wrong, and every one of them achieved a real, worthwhile result. What this comparison actually demonstrates is a discipline worth applying to any telephony case study, or any vendor case study at all: check whether the regulatory deadline cited is still current, Norwich Theatre’s isn’t; check whether the geography actually matches the regulatory pressure being invoked, Dental Tech’s doesn’t quite; check the case study’s own numbers against each other for internal consistency, Seths Estate Agents’ don’t fully resolve; and translate any headline percentage, uptime, cost reduction, into what it concretely means before treating it as a benchmark. Applied consistently, that discipline doesn’t make any of these four stories less useful. It makes them useful for the right reasons, rather than for whichever number happens to be in the headline.