T-Systems Enterprise Services GmbH

Netzbetreiber
Citycarrier, Festnetz-Dienste, Mobilfunk-Dienste, Richtfunk-Lösungen, Tetra, Tetrapol

Serviceprovider
Application Service Provider (ASP), Fax-over-IP (FoIP), Festnetz-Serviceprovider (ISDN, xDSL), Internet-Serviceprovider, Mobilfunk (GMS-/UMTS-/LTE-Dienste), Online-Contentprovider, Satellitenkommunikation, Service-Rufnummern, Unified Messaging (UM)

Telematik
Flottenmanagement, Flottensteuerung, Global Positioning System (GPS), Not- und Pannenruf, Routenplanung

Computer Telephony Integration
Callcenter-Lösungen, Customer Relationship Management (CRM)

Unified Communications (UC)
VoIP-TK-Anlagen (hybrid,rein IP), Unified Communications