01 / 07
Case file
Enterprise voice — IP-PBX, SIP trunking, hosted UC and hospitality PMS integrations — Grandstream, NEC, Cisco and Yeastar.
/ The discipline, in detail
How we approach epabx & ip-pbx.
Voice infrastructure is rarely glamorous and never optional. We design extension plans, hunt groups, IVR menus, voicemail-to-email flows and PMS check-in/check-out triggers per the property's actual operating model. SIP trunks are sized to peak concurrent calls, not the brochure number. Hosted UC is offered where it lowers TCO; on-prem stays where data residency or call-volume economics warrant it.
On record
Every epabx & ip-pbx engagement is documented end-to-end — design, programming, commissioning, calibration — and handed over with the files our successors would need if we were never to return.
/ Where we deploy this
Active across 4 sectors.
EPABX & IP-PBX is rarely a standalone brief — it sits inside a wider sector practice with its own codes, expectations and operating rhythm.
/ Sister services
The rest of it.
A serious brief usually crosses two or three of these. Read across the discipline — we deliver them as one contract.
- 02
IT & Networking
Wires the building's nervous system.
Structured cabling, Wi-Fi 7, switching, SD-WAN and data-centre networking — Cisco, HPE Aruba, Juniper, Netgear, CommScope.0 - 03
Structured Cabling
Backbones rated for the next quarter-century.
Cat6A, OS2 and OM4/OM5 structured cabling — designed to TIA-568, terminated to manufacturer warranty and labelled to a documented patch schedule.1 - 04
Enterprise Wi-Fi
Coverage you can measure, not just claim.
Wi-Fi 7 and Wi-Fi 6E enterprise wireless — Cisco, Aruba, Juniper Mist, Netgear — site-surveyed to the building's actual cell-edge SNR.2 - 05
Network Security
Segmentation. Visibility. Recoverable backups.
Next-generation firewalls, segmentation, NAC, EDR, SIEM and backup — Fortinet, Palo Alto, Sophos, Check Point — designed to how breaches actually unfold, not how vendors describe them.3 - 06
Servers, Storage & Data Centre
On-prem, hybrid and edge — sized for actual workload.
Server and storage architecture — Dell, HPE, Lenovo, Pure, NetApp — for on-prem and hybrid workloads, including precision cooling, rack design and DR.4 - 07
Video Conferencing Infrastructure
Reliability beats features.
Cloud, on-prem and hybrid VC — Microsoft Teams, Zoom, Google Meet, Cisco Webex — with bridges, gateways, recording and transcription infrastructure.5
/ Where this system has been deployed
EPABX & IP-PBX on the ground.
The reference projects below carry a epabx & ip-pbx layer engineered as part of an integrated stack. Each case study walks through the engineering challenges that were solved, the standards the work was held to, and the operational outcome on the day-two team.
/ Frequently asked
EPABX & IP-PBX — what buyers ask first.
On-prem PBX or cloud PBX in 2026?
Cloud PBX is the default for new deployments under 200 extensions; on-prem stays sensible above 500 extensions, in regulated sectors or with intermittent internet. Cloud is the default for new deployments under 200 extensions. On-prem stays sensible above 500 extensions, in regulated sectors with data-residency rules, or in properties with intermittent internet (where the call must continue through the outage).
EPABX or IP-PBX — which should we deploy?
IP-PBX is the right answer for any new install in 2026. SIP trunks have replaced ISDN for nearly all enterprises; the cost-per-extension is lower; integration with video conferencing, mobile clients and recording is built-in. We retain EPABX hardware only where existing extensions and analogue lines are too embedded to migrate.
How many extensions can a typical IP-PBX support?
Grandstream UCM630x supports 3,000 extensions and 450 concurrent calls — sufficient for most hospitals and hotels. Alcatel-Lucent OXO Connect scales similarly. Above that scale we deploy distributed clusters; below that scale we deploy a single appliance with redundant power.
Do IP phones need PoE switches?
Yes — modern IP phones (Grandstream, Alcatel, Yealink) all draw power from the network port. We design the network with sufficient PoE budget on day one — a typical 24-port PoE+ switch handles 24 phones plus 8 access points. Sizing for year-three growth is part of the design.
Can the PBX integrate with our CRM?
Yes — modern IP-PBX platforms expose APIs and SIP-based call-event hooks that integrate with Salesforce, HubSpot, Zoho CRM and most internal CRMs. Caller-ID lookup against the customer record, call logging and click-to-dial are standard features we configure on most enterprise deployments.
What's the lifecycle of an IP-PBX deployment?
Hardware lasts 7–10 years; firmware refresh cycle is 2–3 years. We track firmware and configuration baselines offline so a hardware refresh is a same-day cutover rather than a multi-week rebuild. End-of-life on a major version is signalled 18 months in advance through our AMC programme.
· Begin
Begin a
epabx & ip-pbx
brief.
Tell us about the building, the timeline, and what success looks like a year after handover. We will reply within two working days with a written response, not a sales pitch.