William Rubio
CallTower
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The IT Leader's Checklist for Upgrading to Native UC Mobility (Without Expanding Your Risk Profile)
For organizations with both desk and deskless workers, native UC mobility has moved from a future roadmap item to an active deployment priority.
Kristian McCann · 17 Jun 2026
Beyond the App: How eSIM and Network-Level Spam Blocking Are Redefining Secure Communications
Why it matters: CallTower’s eSIM for Microsoft Teams Mobile and Webex Go adds network-level spam blocking and secure native dialling, published on UC Today.
Kristian McCann · 10 Jun 2026
The New Mobile Edge: Balancing Native UC Mobility with Next-Gen Voice Security
Native eSIM could replace risky OTT mobile UC as AI vishing and compliance pressures rise. Published on UC Today, with CallTower and The Collab Collective.
Kristian McCann · 3 Jun 2026
AI Risk Mitigation Due Diligence: The IT and CX Leader Checklist
The business tech space is currently awash with breathless promises around AI's possibilities.
Kieran Devlin · 5 May 2026
Responsible AI for UC and CX: A Governance Model That Survives Multi-Platform Reality
For most modern businesses, AI has evolved from a speculative frontier into an operational baseline.
Kieran Devlin · 27 Apr 2026
AI Risk in UC and Contact Centers: How to Reduce Sprawl and Stay Compliant Without Slowing Delivery
Join UC Today host Kieran Devlin as he sits down with William Rubio, Chief Revenue Officer at CallTower , and Elka Popova, Vice President and Senior…
Kieran Devlin · 20 Apr 2026
CallTower Elevates Mobility and Security With Microsoft Teams, Webex eSIM Access
CallTower enhances security and Microsoft Teams and Webex mobility with free eSIMs and Mutare-powered network-edge voice spam blocking.
Kieran Devlin · 10 Apr 2026
BIG UC Update: CallTower's William Rubio on Global Growth, Partner-Led Growth and the Next Phase of AI in UC
CallTower’s William Rubio explains why Microsoft, Cisco, Zoom, Genesys, Five9, WhatsApp for Teams, Dual eSIM and practical AI matter for
Kieran Devlin · 9 Mar 2026
From Fog to Focus: 10 Takeaways from Cloud Connections 2026
Cloud Connections 2026 shows why UCaaS and CCaaS buyers should care: AI, RAG, compliance, trust and UX now decide winners. Published on UC Today.
Marcus Law · 23 Jan 2026
Cloud Connections 2026: Your Complete Event Guide for Cloud Communications Leaders
Heading to Cloud Connections 2026? Get the complete guide to agenda highlights, AI strategies, and networking tips for cloud leaders in Delray Beach.
Marcus Law · 8 Jan 2026
CallTower, Tollring Expand Microsoft Teams Partnership to Elevate Business Intelligence
CallTower expands its partnership with Tollring to elevate AI-enabled conversation intelligence and compliance recording in Microsoft Teams.
Kieran Devlin · 8 Jan 2026
Preparing for the Future of Unified Communications in 2026 - UC Roundtable
Industry leaders from RingCentral, CallTower, Vonage, and Wildix discuss AI, security and the future of unified communications in 2026.
Christopher Carey · 29 Dec 2025
How a Florida Bank Achieved Seamless Migration and Full Adoption with Operator Connect by CallTower
Why UC migrations fail: CallTower helped a Florida bank move to Microsoft Teams Operator Connect with zero downtime, UC analytics and full adoption. Published o
Kieran Devlin · 15 Dec 2025
Operator Connect Done Right: What IT Leaders Need to Know Ahead of 2026
CallTower’s William Rubio explains why Operator Connect, Microsoft Teams and AI-ready UC matter for compliance, global rollouts and ROI.
Kieran Devlin · 8 Dec 2025
How Microsoft Teams Operator Connect Helps IT Leaders Take Back Control of UCaaS Provider Sprawl
Operator Connect can cut UCaaS sprawl and give IT one accountable path across Microsoft Teams, contact centre and compliance. Published on UC Today.
Kieran Devlin · 1 Dec 2025
CallTower Capitalizes on Services Opportunity with Inoria
CallTower’s Inoria buy boosts Genesys, Five9 and AI services, giving partners commissions on implementation and managed services. Published on UC Today.
David Dungay · 31 Mar 2025
CallTower and Five9 Partner to Unify CCaaS and UCaaS Solutions for Customers
CallTower and Five9 unite Operator Connect for Microsoft Teams with CCaaS and AI, giving buyers unified reporting and smoother customer service. Published on UC
Kristian McCann · 3 Feb 2025
CallTower To Elevate Insights With Analytics Collaboration for Microsoft Teams
CallTower Analytics Collaboration for Microsoft Teams gives buyers chat, meeting and wellbeing insights to improve productivity. Published on UC Today.
Kieran Devlin · 19 Dec 2024
CallTower's Operator Connect To Boost Global Comms With LATAM, APAC Expansion
CallTower’s Operator Connect expansion into LATAM and APAC brings Microsoft Teams PSTN calling to 27 countries. Published on UC Today.
Kieran Devlin · 18 Nov 2024
Customer Engagement With Microsoft Teams - UC Round Table
This Round Table shows why Microsoft Teams, Teams Phone, Operator Connect, Copilot and contact centre integrations now matter for CX.
Kieran Devlin · 6 Nov 2024
Are You Prepared for the Next Microsoft Outage? Ensure Uninterrupted Business Operations
Plan for Microsoft outages with CallTower infrastructure strategies to keep business communications continuous. Published on UC Today.
Susie Harrison · 4 Nov 2024
Microsoft Copilot: The Opportunities and Challenges
Why Microsoft Copilot matters for hybrid work: UC Today and CallTower’s William Rubio assess benefits, risks, secure use and industry use cases.
Susie Harrison · 8 Oct 2024
CallTower, Nuvias UC To Distribute Advanced Cloud Comms Across EMEA
CallTower and Nuvias UC will expand cloud communications across EMEA, giving channels global voice on Microsoft Teams, Cisco Webex and Zoom. Published on UC Tod
Kieran Devlin · 12 Sept 2024
CallTower, Phonism Unveil Advanced Device Management Solution
CallTower and Phonism add multi-vendor device management for Webex Calling, speeding migration, security and UCaaS onboarding.
Kieran Devlin · 27 Aug 2024
CallTower Partners with Tollring on Analytics 365 for Microsoft Teams
CallTower and Tollring bring Analytics 365 to Microsoft Teams, adding call analytics, AI recording and wallboards to improve customer experience. Published on U
James Stephen · 30 Jul 2024
CallTower Continues Global Operator Connect Expansion
CallTower expands Operator Connect globally as demand shifts from Direct Routing, with William Rubio on differentiation.
Tom Wright · 29 Jul 2024
UC All-Stars: Leaders Choose Their Business Heroes
UC All-Stars shows why Richard Branson, Steve Jobs and Satya Nadella still shape UC and workplace tech thinking. Published on UC Today.
Tom Wright · 18 Jul 2024
UC All-Stars: Leaders Name Their Biggest Challenges of 2024
UC All-Stars from Avaya, CallTower, GoTo and Wildix explain 2024 challenges, from AI and innovation to growth.
Tom Wright · 11 Jul 2024
CallTower Expands Operator Connect Offering
CallTower is expanding Microsoft Operator Connect into APAC, helping Teams buyers simplify PSTN voice, compliance and analytics. Published on UC Today.
Gabriel Avner · 9 Jul 2024
CallTower Continues EMEA Expansion With Major Leadership Hires
Why it matters: CallTower is deepening EMEA growth with new Sales Directors and Sales Ops leadership for Microsoft Teams, Zoom and Cisco. Published on UC Today.
Kieran Devlin · 20 Jun 2024
How MSPs can Bill the Future of Microsoft Services
Watch on YouTube UC Today's David Dungay speaks to William Rubio, CRO, CallTower and Dave Michels, Founder, TalkingPointz about the opportunity for MSPs…
David Dungay · 7 Jun 2024
CallTower Announces Rebiller Program for Microsoft Teams
CallTower’s rebiller program helps MSPs, VARs and resellers add native Microsoft Teams voice via Operator Connect and automated billing.
Gabriel Avner · 6 Jun 2024
CallTower Launches Landmark GTx for Microsoft Teams Operator Connect
CallTower’s GTx could simplify Microsoft Teams Operator Connect rebilling for MSPs and resellers, streamlining ops and growth. Published on UC Today.
Kieran Devlin · 29 May 2024
The Porting Playbook: Solving Porting Challenges for Mixed Environments
Porting challenges in mixed environments matter for UC buyers spanning geographies. Published on UC Today with CallTower, William Rubio and Irwin Lazar.
David Dungay · 16 May 2024
CallTower Upgrades Webex Calling With MMS and SMS Capabilities
CallTower adds MMS and SMS to Cisco Webex Calling with CT Text, bringing translation, tracking and secure texting in one platform.
Kieran Devlin · 3 Apr 2024
Elevating UCaaS CX with Microsoft Copilot
Why UCaaS buyers should care: Microsoft Copilot could automate Teams, PowerPoint and SharePoint workflows, with CallTower, Cisco Webex and Zoom insights. Publis
Gabriel Avner · 20 Mar 2024
CallTower Expands Operator Connect Telephony Across EMEA
CallTower expands Operator Connect for Microsoft Teams across EMEA, adding PSTN voice, Direct Routing and telephony for Teams.
Kieran Devlin · 6 Mar 2024
Big UC Update: CallTower
CallTower shares its 12-month product roadmap and customer trends, helping UC buyers plan ahead. Published on UC Today.
David Dungay · 22 Jan 2024
Building the Right Approach to Enable Voice for Microsoft Teams
Looking forward to 2024, one of the biggest themes that organizations are talking about is how to leverage their technology investments to do more with…
Gabriel Avner · 28 Nov 2023
Enhancing Collaboration: Bridging the Gaps in Microsoft Teams
The world of business communications has changed drastically in recent years. As hybrid and remote work continue to change the landscape, and new methods…
Rebekah Carter · 18 Oct 2023
Native Microsoft Teams: Marketing Jargon or Reality?
Why native Microsoft Teams direct routing matters for UCaaS buyers: fewer portals, better Microsoft support and failover. Published on UC Today.
Gabriel Avner · 26 Sept 2023
License to Thrill: Empowering Microsoft Teams Users with AI for Outstanding Customer Experience
Why it matters: Teams, Five9 and CallTower are bringing generative AI to UCaaS and CCaaS, helping staff deliver better customer experience. Published on UC Toda
Rob Scott · 15 Aug 2023
Inside CallTower's European Expansion
CallTower’s European expansion shows why provider choice matters in crowded UCaaS and voice markets. Published on UC Today.
Tom Wright · 3 Aug 2023
Solgari is the First Application to Live Within Teams
Teams-native Solgari in Microsoft Teams could simplify UCaaS and CCaaS for agents, with Azure deployment, Open API and CRM links. Published on UC Today.
Gabriel Avner · 19 Jul 2023
Big UC News from Microsoft, Zoom, Theta Lake, CallTower and 8x8
Why workplace buyers should care: Microsoft Inspire, Theta Lake-Zoom Contact Centre security, CallTower Solgari for Teams and 8x8 partner ecosystem updates. Pub
Kieran Devlin · 14 Jul 2023
CallTower Launches Teams-Integrated Contact Centre Solgari
CallTower launches Solgari for Teams, a Microsoft-certified contact centre for Operator Connect and Direct Routing, with UCaaS, CCaaS and
Kieran Devlin · 12 Jul 2023
3 Reasons to Love Zoom Phone with CallTower
Why Zoom Phone matters for UC buyers: CallTower adds BYOC voice, global support and Zoom familiarity alongside Microsoft Teams and Cisco.
Gabriel Avner · 25 May 2023
Microsoft vs Cisco vs Zoom - Leaders Share their Market Winning Insights at Channel Partners Conference
Microsoft Teams, Cisco Webex and Zoom outline how hybrid work, AI, contact centre and Teams Phone can help channel partners win.
Rob Scott · 3 May 2023
CallTower Bringing Zoom BYOC Offering to EMEA
CallTower expands Zoom BYOC in EMEA, letting UCaaS buyers keep numbers and carriers with Zoom Phone Provider Exchange. Published on UC Today.
Kieran Devlin · 2 May 2023
CallTower Adds Zoom Phone to Enhance its UCaaS Portfolio
CallTower adds Zoom Phone to its UCaaS portfolio, helping buyers unify voice, conferencing, video and messaging across one cloud platform.
Kieran Devlin · 13 Apr 2023
UC Round Table: Fusing UCaaS with CCaaS
UCaaS and CCaaS are converging, with Vonage, Zoom, Avaya, GoTo, AudioCodes and CallTower boosting CX, EX and hybrid work. Published on UC Today.
Jonny Wills · 13 Mar 2023
Navigating Rocky Workforce Changes Ahead
Layoffs and hiring swings are making UCaaS and CCaaS planning harder, as CallTower helps buyers flex Microsoft, Cisco, Zoom and Teams.
Gabriel Avner · 13 Feb 2023
#BIGUCUPDATE with CallTower - UC Summit 2023
CallTower’s 2023 roadmap and digital communications trends show what customers can expect, with UC Today’s #BIGUCUPDATE at UC Summit 2023.
David Dungay · 21 Jan 2023
CallTower Adds a BYOC Experience to Zoom with its Latest App
CallTower adds BYOC for Zoom with the CallTower App, linking Zoom Phone, PSTN and geo-redundant global voice for UCaaS buyers. Published on UC Today.
Ryan Smith · 6 Jan 2023
Who are the UCaaS Leaders for 2023?
The race to the top of the UCaaS market is heating up. Over the nearly past two years, we have witnessed significant shifts in the field of unified…
Gabriel Avner · 21 Dec 2022
CallTower Expands its Channel Partnership Team
CallTower adds Chuck Ward to its channel partnership team, boosting OEM alliances across Microsoft Cloud Partner Program and Cisco Webex RTM. Published on UC To
Ryan Smith · 16 Nov 2022
CallTower Designated Microsoft Certified Solutions Partner
CallTower’s Microsoft Certified Solutions Partner status boosts Microsoft 365, Teams voice and hybrid work support for buyers.
James Stephen · 31 Oct 2022
Delivering Teams Voice to GCC High Users
CallTower brings Teams Voice to Microsoft 365 GCC High, giving government users compliant Direct Routing and VoIP.
Rebekah Carter · 14 Oct 2022
5 Crucial Steps to Combining UCaaS with CCaaS
Combining UCaaS and CCaaS can cut costs and improve service; Published on UC Today, CallTower’s William Rubio explains 5 steps, APIs and CRM integration.
Rebekah Carter · 7 Oct 2022
CallTower Brings Native SMS and MMS to Teams
CallTower adds native SMS and MMS to Microsoft Teams via CT Text, improving workflows, security and multilingual calling.
Ryan Smith · 29 Sept 2022