Optional additional package for all communication systems of type ES 5xx up / ES 54x / ES 6xx / ES 7xx [all from system firmware 1.7] and ES PURE-IP. Scope of services: enables the activation of 3 additional channels/profiles for the audio information system, which can be freely allocated via call distribution and used in parallel. System expansion to up to 4 (ES 5xx up, ES 54x and ES 6xx, ES PURE-IP) / 7 (ES 7xx) AIS channels/profiles possible! Including complex settings for the process behavior.