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Calling

Modern Cloud Calling for Connected, Productive Teams

Simplifying communication for modern teams

Fragmented PBX estates, inconsistent user experiences and manual number management create operational drag and risk. As hybrid work becomes standard, businesses need calling that is secure, resilient and integrated with day to day tools, and that can extend to Unified Comms (UC) where appropriate. 

Unify voice across your business with secure, scalable cloud calling that works wherever your people do. Node4 delivers a vendor-aligned approach across Microsoft and Cisco, underpinned by our SIPLink PSTN platform, so you can modernise at your pace and maximise existing investments. Optional Unified Communications (UC) features like messaging and presence keep teams in flow. 

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Top 1% of Microsoft Partners, globally.

We’re an end‑to‑end Microsoft partner, holding all six Solutions Partner designations, five consecutive years of Inner Circle status, 3,000 Microsoft certifications, and Direct CSP status – giving customers priority access, funding routes and expert support.

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  • MSC
  • SEC
  • MODWORK
  • BIZAPPS
  • DIZAPPS
  • DAIZ
  • IAZ
  • MS AE MSP

The problem we're solving

Why legacy telephony holds businesses back

Disconnected platforms slow collaboration and response
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Manual routing, upgrades and number changes increase overheads
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Inconsistent experiences across sites, devices and home workers
devices

Security, compliance and emergency services challenges
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Hard to scale for acquisitions, new sites and seasonal demand
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What this means for your business

Productivity
priority

Calling embedded in everyday apps; optional UC features reduce context switching and improve follow up

Managed Services 1-1

Agility
priority

Scale users, sites and features quickly without disruptive upgrades

Managed Services 1-1

Insight
priority

Call quality and usage analytics to right size spend and improve experience

Managed Services 1-1

Experience
priority

Consistent, high quality calling on any device, from anywhere

Managed Services 1-1

Resilience
priority

Built in continuity options and carrier grade PSTN connectivity

Managed Services 1-1

Node4’s approach to modern cloud calling

We scope, build and run cloud calling across Microsoft and Cisco ecosystems, focused on practical outcomes. Our experts guide you from discovery and migration to adoption and ongoing optimisation, so calling and optional UC become a natural part of work, not another system to manage. 

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  • priority
    priority

    Cloud calling

    integrated with Microsoft Teams and Cisco Webex

  • priority
    priority

    Number porting

    advanced routing and policy management

  • priority
    priority

    Phased migrations

    and coexistence with legacy PBX

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    priority

    Governed delivery

    user adoption and change management

  • priority
    priority

    24x7 managed service

    with proactive monitoring and reporting

What powers our solution

Microsoft Teams Phone (Teams Calling)
priority

Unified collaboration client with PSTN calling; call queues, auto attendants and policy based controls

Cisco Webex Calling
priority

Enterprise grade cloud PBX and devices; robust call control and proven multi site deployments

Node4 SIPLink
priority

UK regulated, carrier grade PSTN connectivity; number porting, bundles and analytics; foundation for Calling and Contact Centre

Node4 Managed Services
priority

Ongoing support, monitoring and optimisation to maintain quality and simplify operations

AI & Analytics
priority

Enable AI features where licensed, such as call summarisation and task capture in Microsoft 365, and audio intelligence in Webex, to reduce admin and improve follow up.

See what funding your business could access​

As a Microsoft Azure Expert MSP and Inner Circle Partner, we help customers access exclusive Microsoft funding to reduce cost, de‑risk decisions, and accelerate technology adoption.

Accreditation and certifications

  • priority
    End to end control
    Node4 owns and operates UK data centres and core network, enabling consistent quality and accountability
  • priority
    PSTN expertise
    SIPLink underpins our Calling and Contact Centre solutions and handles high volumes of calls
  • priority
    Proven delivery
    Experienced in migrating and supporting Microsoft and Cisco calling at scale across UK mid market and public sector
View case study arrow_right_alt

Stephensons

Transitioning to a scalable cloud contact centre with omnichannel customer connections.

Why Node4?

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Unified expertise
priority

Collaboration, UC, networks, cloud and security under one roof

Integration specialists
priority

Aligned with Microsoft and Cisco ecosystems, plus direct PSTN via SIPLink

Outcome focused
priority

Success measured on user experience, reliability and business impact

AI readiness
priority

Practical guidance on enabling AI features safely where licensing and policy permit

Lets talk Calling

Meet your users where they work.  

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