CryptoPhone Group Manager by GSMK is a centralized management software solution for secure contacts and call groups in CryptoPhone devices. It enables administrators to organize private infrastructure and establish closed user groups by setting individual signaling permissions according to an organization's communication structures. CryptoPhone Group Manager operates as an optional software solution with a browser-based frontend, running on private CryptoPhone infrastructure servers. It provides complete control over user access to the organization's CryptoPhone communication system.