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.
• One-button Call - Enables quick, convenient calling operation.
• Metal Housing- Rugged construction withstands weather and impacts.
• Unlock Door with DTMF - Remotely open door via DTMF keypad codes.

Product Details

Basic Features

•    One call button, 2 SIP lines

•    Duplex speaker phone (HF)

•    Intelligent DSS Keys (Speed dial)

•    Wall-mount installation

•    1 embedded short circuit input interface

•    1 embedded short circuit output interface

•    Multicast

•    Local 3-way Conference

Product Features

Interfaces

•    1*10/100Mbps ethernet, RJ45

•    Passive Switch: NO and NC

•    Speaker: 3W/40

•    Cables: CAT5 above

•    Power Supply: DC12V/1 A or PoE 802.3af

•    Shell Material: aluminum alloy

Audio Features

•    Narrowband Codec: G.711 a/u, G.723.1, G.726-32K, G.729AB

•    Wideband Codec: G.722

•    Duplex intercom with Acoustic Echo Canceller (AEC)-Hands-free mode, 96ms tail-length

•    Voice Activity Detection (VAD)

•    Comfort Noise Generation (CNG)

•    Background Noise Estimation (BNE)

•    Packet Loss Concealment (PLC)

•    Dynamic Adaptive jitter Buffer up to 300ms

•    DTMF: In-band, Out-of-Band - DTMF-Relay (RFC2833) / SIP INFO

Protocols

•    SIPv2.0, RFC3261, UDP/TCP/TLS/

•    RTP/RTCP/SRTP

•    IPv4/UDP/TCP, Static IP/ DHCP/ PPPoE

•    802.1x, LLDP, VLAN 802.1p/q

•    STUN, RFC4028

•    SNTP/ FTP/TFTP/ HTTP/HTTPS

•    TR-069

•    L2TP/OpenVPN

Intercom

•    Call log (900 entries, in/out/missed)

•    Programmable DSS/Soft keys

•    Network Time Synchronization

•    Action URL/ Active URI

Other Specifications

•    1 call buttons

•    Power Supply: DC12V/1 A or PoE 802.3af

•    Shell Material: aluminum alloy

•    Working Temperature: -20- 50°C

•    Storage Temperature: -20-50°C

•    Working Humidity: 10-90%

•    Dimensions: 160x105x40mm (L x W x H)