AP1820D is a VoIP gateway supporting dual DC power for high stability and fault tolerant service. AP1820D supports maximum 16 ports analog voice interface like as FXS, FXO, E&M and two ports digital E1/T1 voice interface. Analog and digital voice interface of AP1820D provide an optimized call scenario when it interoperates with conventional PBX and PSTN.
In the front side of AP1820D, there are two port fast Ethernet ports, RS232 console port and LEDs for indicating operational status, line status and LAN Interface status of gateway.
In the rear
side of AP1820D, it supports two VoIP module slots and dual DC power input.
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