A Secondary Gatekeeper can be set up, usually in a separate network, to provide full Gatekeeper services when and only when its primary Gatekeeper fails. Each Gatekeeper itself can be configured with dual/multiple redundancies of CPUs, hard disks and power supplies. Secondary Gatekeeper option adds one more level of service backup for any potential network failures. WoIP’s Server products have been designed to generate a complete CDR (Call Detail Record) for each call received or made. The package's CDR Server collects and prepares these CDRs to be fully integrating with a third-party billing system for both post-paid and pre-paid applications. User-friendly web GUIs powered by a secure web server and Java technology supports the configuration, management and service operations of the whole package. At various user privilege levels, ITSP operators are enabled to perform their duties simply through a standard web browser from anywhere.