Synology America DS411slim 4-bay NAS Part#DS411slim IP Wall Speaker This provides a robust PTT

This provides a robust PTT (push to talk) switch with selectable locking/non-locking operational modes

which could be used for lines

Desk/wall or ceiling subs available

Supports loop-start and ground-start and captures Caller ID name/number using FSK

Synology America DS411slim 4-bay NAS Part#DS411slim IP Wall Speaker This provides a robust PTTProduct features Synology DiskStation DS411slim is designed to provide users with a compact yet feature laden solution for easy file sharing and backup. Snap in 2. 5" hard drives design brings low power consumption, quiet operation, reliability and easy disk replacement in a compact size.