ZKTeco IO Expansion Board, Part# AMT-AHEB-0808 Telephony charger VSU 20TB 3U- RAID5 with

VSU 20TB 3U- RAID5 with 2TB Drives

it is a flagship HD conference phone with powerful voice conferencing features and easy control operation

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The quality NEC Electra Elite DTU-32D-2 (BK) TEL 770052 is a 32 Button Dual LED Speaker Display Telephone with 4 Soft keys

ZKTeco IO Expansion Board, Part# AMT-AHEB-0808 Telephony charger VSU 20TB 3U- RAID5 withThe quality ZKTeco AMT AHEB 0808 IO Expansion Board is an OSDP I O that has scalable, Supervised Inputs and 3rd Party Integration. Features: 1*RS 485 8*supervised input (AUX IN) 8*relay output (AUX OUT) 1* power Input (PWR IN) 1*power output (PWR OUT) 1*power detection (AC fail) 1* backup battery detection (BAT Fail) 1*tamper input (TMPR) Inputs: 4 state supervision, resistor values (5% tolerance), Outputs: 8 relays, 8* Form C with dry contacts RS485