ETERNITY GENX12SAC Max. Universal Slots: 12 Max. IP Trunks: 99 (License-free) Max. IP Users: 999 Max. VOCODER Channels: 128 Max. VMS Channels: 64 Mounting: 19 inch 4U enclosure Note: VOCODER and VOICEMAIL hardware modules are not included. All ETERNITY GENX 12SAC/12SDC/12SPSBB with SARVAM UCS SME (FACTORY LOADED)