DEEP is the B2B telecom, cloud and ICT services brand of POST Luxembourg. For businesses looking for POST's current Cloud PBX, managed communications or enterprise telephony services, DEEP is now the relevant brand.
Its telephony portfolio spans managed unified communications, hosted Cloud PBX and bundled connectivity services, positioning DEEP differently from standalone Cloud PBX platforms and self-managed PBX software.
This profile focuses on DEEP as a current business telephony provider: what it offers, the types of organisations it targets, and how its approach compares with other Luxembourg operators and phone-system platforms.
⏱ 6 min read · 🇱🇺 Local provider · 📅 Updated April 2026 · 🔗 deep.eu
<aside>
🧭 On this page
⚖️ Quick compare with two local rivals
🔎 Other providers worth considering
</aside>
DEEP is not a new company. It is a rebrand. In 2024, POST Luxembourg unified its B2B portfolio under the DEEP name to bring together telecom, IT services, cloud infrastructure, and cybersecurity in one offer.
POST has operated Luxembourg's primary fixed and mobile network for decades. With roughly 4,500 employees across the group and the largest network infrastructure in the country, DEEP is the incumbent operator: the default choice for large organisations and public institutions.
For small and medium businesses, DEEP offers ConnectedOffice: a bundled package that combines professional internet, WiFi, telephony, and security into one managed connection.
DEEP's telephony portfolio has three tiers plus an SME bundle. Features are not equal across tiers, so it matters which one you land in.
The premium tier. The telephone exchange runs on the customer's own IT infrastructure or in a dedicated DEEP data centre environment. Uses Cisco technology (Jabber, Webex). Call recording, contact centre features, and Microsoft Teams Direct Routing are included. SLA of 99.8%.
The mid-range cloud option. Hosted in DEEP's private cloud. Includes auto-attendant, call queues, voicemail, softphone via Cisco Webex, and fixed-mobile convergence via LuxZone. Call recording is not available on this tier.
Sits between Managed UC and CloudPBX. Hosted in public cloud and advertises flexibility. Fewer public details are available on this option.