List of SIEL VoIP Customers
Polzela, 3313,
Slovenia
Since 2010, our global team of researchers has been studying SIEL VoIP customers around the world, aggregating massive amounts of data points that form the basis of our forecast assumptions and perhaps the rise and fall of certain vendors and their products on a quarterly basis.
Each quarter our research team identifies companies that have purchased SIEL VoIP for PBX, VoiP and Phone Systems from public (Press Releases, Customer References, Testimonials, Case Studies and Success Stories) and proprietary sources, including the customer size, industry, location, implementation status, partner involvement, LOB Key Stakeholders and related IT decision-makers contact details.
Companies using SIEL VoIP for PBX, VoiP and Phone Systems include: Telemach, a Slovenia based Communications organisation with 500 employees and revenues of $85.0 million, Terme Olimia Slovenia, a Slovenia based Leisure and Hospitality organisation with 343 employees and revenues of $40.0 million, Sonce.net Slovenia, a Slovenia based Professional Services organisation with 10 employees and revenues of $1.0 million and many others.
Contact us if you need a completed and verified list of companies using SIEL VoIP, including the breakdown by industry (21 Verticals), Geography (Region, Country, State, City), Company Size (Revenue, Employees, Asset) and related IT Decision Makers, Key Stakeholders, business and technology executives responsible for the software purchases.
The SIEL VoIP customer wins are being incorporated in our Enterprise Applications Buyer Insight and Technographics Customer Database which has over 100 data fields that detail company usage of software systems and their digital transformation initiatives. Apps Run The World wants to become your No. 1 technographic data source!
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| Logo | Customer | Industry | Empl. | Revenue | Country | Vendor | Application | Category | When | SI | Insight |
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Sonce.net Slovenia | Professional Services | 10 | $1M | Slovenia | SIEL | SIEL VoIP | PBX, VoiP and Phone Systems | 2018 | n/a |
In 2018, Sonce.net Slovenia implemented SIEL VoIP to centralize telephony for the Ljubljana-based digital agency. The deployment targeted PBX, VoiP and Phone Systems functionality, and SIEL is documented as the vendor providing hosting, DNS and communications services that supported the engagement.
Module usage for SIEL VoIP is inferred from SIEL reference material and Sonce.net's use of SIEL-managed nameservers, indicating a hosted PBX deployment with SIP registration, call routing, voicemail, and extension and user provisioning capabilities consistent with PBX, VoiP and Phone Systems. The engagement consolidated hosting and telephony under SIEL-managed infrastructure in the Slovenia region, centralizing provisioning and operational responsibility for DNS and telephony within the vendor-managed environment.
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Telemach | Communications | 500 | $85M | Slovenia | SIEL | SIEL VoIP | PBX, VoiP and Phone Systems | 2019 | n/a |
In 2019, Telemach engaged SIEL to deploy SIEL VoIP as a PBX, VoiP and Phone Systems solution to modernize telecommunications and unify voice services across its Slovenia operations. The engagement positioned SIEL VoIP as the primary telephony platform delivering hosted call control and centralized user management for Telemach.
Implementation scope included call control, SIP trunking, user provisioning and directory synchronization, voicemail and auto attendant capabilities, and softphone and desk phone provisioning consistent with PBX, VoiP and Phone Systems functionality. Configuration emphasized centralized dial plans, extension mapping, and policy-based call routing to support corporate communications and contact center workflows. Module usage is inferred from SIEL references and Telemach subdomain evidence rather than a dedicated public case study.
SIEL delivered related infrastructure including VPN and SSO to secure signaling and media and to centralize authentication, enabling SSO-based user access and secure SIP connectivity across sites. The deployment covered Telemach's Slovenia footprint and targeted IT, corporate communications and customer-facing telephony functions. Integrations focused on identity-aware provisioning and infrastructure-level security rather than broader enterprise application integration.
Operational governance introduced centralized provisioning workflows and IT-led configuration controls for number assignment and authentication, reducing distributed handset administration. The work improved centralized telephony and infrastructure integration for Telemach in Slovenia as stated by vendor references.
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Terme Olimia Slovenia | Leisure and Hospitality | 343 | $40M | Slovenia | SIEL | SIEL VoIP | PBX, VoiP and Phone Systems | 2020 | n/a |
In 2020, Terme Olimia Slovenia implemented SIEL VoIP to introduce hosted telephony as part of its PBX, VoiP and Phone Systems strategy, engaging vendor SIEL to provide hosted services for the property. The engagement focused on improving guest communications and call handling for this hospitality operator in Slovenia, and SIEL lists Terme Olimia on its references for that hosted VoIP work.
SIEL VoIP was implemented as a hosted PBX and telephony service with typical PBX capabilities configured to support hotel operations, including centralized call handling, queueing and routing for guest services, voicemail and remote accessibility for staff. The implementation reflects category-aligned functionality common to PBX, VoiP and Phone Systems, configured to prioritize guest-facing communications and internal call management workflows.
The deployment used a vendor-hosted architecture to deliver voice services across the Slovenia site footprint, targeting telecommunications and guest services teams such as front desk, reservations and guest relations. Operational coverage remained focused on on-site hospitality functions, with remote accessibility enabling staff to manage calls off-site when required.
Governance and rollout were executed as a vendor-provided hosted service engagement, with operational ownership shared between Terme Olimia telecommunications stakeholders and SIEL support teams. According to the vendor reference, the engagement delivered improved call management and remote accessibility for Terme Olimia, aligning the SIEL VoIP implementation to the organizations guest communication needs.
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