Here are some key features highlighted for a audio intercom product:

• High Definition Audio - Provides clear, natural sound quality.
• Wall Mounting - Allows flexible installation on walls or surfaces.
• Dual-button Call - Enables quick, convenient calling operation.
• Metal Housing, IP65, IK10 - Rugged construction withstands weather and impacts.
• Unlock Door with DTMF - Remotely open door via DTMF keypad codes.

Product Details

Key Features

•    HD Audio

•    Wall mounting 

•    Two call buttons

•    Metal housing, IP65, IK10 

•    Unlock door with DTMF

Product Features

Interfaces

•    1 100M/10M Ethernet, POE

•    1 IP camera interface 

•    2 relay output

•    1 sensor short circuit input

•    2 exit buttons

•    1 recording output

•    1 8Ω speaker

•    1 analog audio output 

•    1 external audio input 

•    1 MIC

•    1 tamper proof detection

•    1 external Wiegand card reader 

•    1 RS232

•    1 DSS key

Audio Features

•    HD voice

•    Two-way audio stream

•    Wideband codec: G.722

•    Narrowband codec: PCMA, PCMU, G.729, G723_53, G723_63, G726_32

•    Echo cancellation with G.168 

•    Voice activity detection (VAD) 

•    Comfort noise generator (CNG) 

•    Built-in Micro and speaker

•    Acoustic echo cancellation audio output

Protocols & Network

•    SIP v1 (RFC2543), v2 (RFC3261) 

•    SIP over TLS, SRTP

•    Onvif 

•    TCP/IPv4/UDP

•    RTP/RTCP, RFC2198, 1889

•    HTTP/HTTPS/FTP/TFTP

•    ARP/RARP/ICMP/NTP

•    DNS SRV/ A Query/NATPR Query 

•    Primary /Secondary DNS

•    STUN, Session timer

•    802.1p/q, DSCP,802.1x

•    DHCP/Static/PPPoE

•    DTMF Mode:

•    In-Band, RFC2833 and SIP INFO

Access Control

•    Dual SIP line, Dual SIP servers 

•    Door Access: DTMF tones 

•    Door Phone features:

Full-duplex

Default auto answer

Action URL/Active

Other specifications

•    2 call buttons

•    Aluminum surface, Metal bottom shell 

•    Power Supply: DC 12V1A or 802.3af PoE 

•    Power Requirements: 802.3af PoE class 3 

•    1* RJ45 10/100M Ethernet jack

•    Wall-mounted installation

•    Dimensions: 200*120*38 mm

•    Operating Temperature:-20~65 ℃ 

•    Storage Temperature: -40~70 ℃ 

•    Relative Humidity: 10~90%