Enhanced Trunking Core
Highlights
Convergence with the narrowband network to achieve unified platform, management, and services
Supports trunking service including private, group, and emergency call, message, location report, SN solution, and E2E encrypiton
Safety, load sharing multi-level redundant architecture, and two-way authentication AIE, VPN, Ipsec, and unified E2E encryption
Smooth evolution from MSO to eTC, from LTE to MC-LTE

Hytera LTE-PMR Convergence Solution Introduction
It is good that data services from commercial LTE carriers can support the data requirements for daily routine scenarios. But it's a totally different picture if you want to swap your private PMR network with LTE service. So why not unify the narrowband PMR and broadband LTE networks?