NML12S1 is aluminum alloy material with cast aluminum back plate, it makes sure that this model support waterproof, dustproof function and IP65 protection; We also use build-in tamper-proof detector to prevent external destroy.
• One or two call button version
• With voice and video recording output
• offers two inputs and two outputs for external equipment connections
• Active external speaker output interface: Support HD voice (G.722) and background music streaming
• Compatible with the main platforms: Aterisk, Broadsoft, 3CX, Metaswitch, Elastix, Avaya etc.