2U standard 19-inch rack structure, black aluminum oxide wire drawing panel, humanized handle, advanced titanium gold polishing process, full of high-end temperament;
The operation is simple, no manual setting is required, and the connection to the server is automatically completed after networking;
1 channel audio signal auxiliary output, convenient to expand external power amplifier; 1 channel USB audio source input;
Support to get tracks from the server and from the U disk;
Automatically complete the synchronization of the timing program with the server, the server program changes, and the network is automatically synchronized;
Compatible with standard SIP (RFC3261) protocol, can access mainstream IP PBX/IMS platform
Support VOIP phone access.
Built-in 2×50W stereo digital constant resistance power amplifier;
★ Two working modes, online and offline, can still perform timing tasks in the event of a network failure;
★ Support remote upgrade of the firmware version of this machine.
Support remote fixed-point broadcasting, remote sub-multicast broadcasting and whole area broadcasting;
The equipment is designed with embedded linux technology and DSP audio processing technology; adopts high-speed industrial-grade chips;
It has the function of collecting and broadcasting, one external audio source input or MIC input, and the collected audio files are sent to the designated terminal for playback;
★ 1 power output, used to connect power amplifier equipment; and has an intelligent power management function, when there is no audio signal input for 3 to 5 minutes, the power amplifier power is automatically turned off, and the power amplifier power is automatically turned on when there is a signal;
Standby power is less than 3W, meeting the national environmental protection and energy saving certification standards;
Support cross-virtual local area network or three-layer routing.
★With remote Internet playback function.
With the function of restoring factory settings
All-in-one rack-mounted design, integrating network audio decoding, digital power amplifier and audio source input
★Linked with IP camera video, real-time monitoring of on-site conditions during broadcasting
Online remote adjustment of output volume through software
Support IP address broadcast
File playback: the delay is less than 50ms;
Real-time speech: Delay is less than 150ms;
The network delay is less than 50MS;
Short circuit, overheating, and overload automatic detection and protection functions;
Interface rate: 10M/100M/1000M adaptive;
Support all audio formats supported by WINDOWS;
★ The products have passed ISO9001, ISO14001 and OHSAS18001 system certification
★ The product has passed 3C certification;
★ IP network broadcasting has obtained a number of invention patents.
★ The manufacturer is a national high-tech enterprise.

Network characteristics:
Support SIP 2.0, TCP/IP, UDP, DHCP
Support primary DNS and secondary DNS server
Support VLAN
Support SNTP client
Support VPN L2TP / PPTP
Support SRTP
Support webpage HTTP/HTTPS
Support Qos: 802.1p/q, DSCP
Support MD5 authentication
DHCP / static / PPPoE
STUN
Configuration and management:
Auto-Provisioning via FTP/TFTP/HTTP/HTTPS/DHCP OPT66/SIP PNP/TR069
Web management interface
Web-based Packet-dump
Configuration export/import
software upgrade
System Log (Syslog)
Audio characteristics:
Narrowband speech coding: G.711a/u, G.723.1, G.726-32K, G.729AB
Wideband speech coding: G.722
Voice activation detection/silence suppression
DTMF: In-band, Out-of-band (RFC2833) / SIPINFO

Physical specifications
Interface: 1 RJ45
1 USB
1 3.5mm audio input
4 way lotus head audio output
1 way DC24V test power supply
3 channels AC220V power output
2 LED signal indicators
Power supply: AC2200V 50HZ
Rear panel buttons: volume +, volume -, reset
Linear input: 500mV
Sex to noise ratio S/N: ≥97dB
Local broadcast audio frequency: 120-16000Hz
Output audio response: 40-18000Hz
Total harmonic distortion: ≤0.1%
Size: 484*415*88mm
Weight: 4.5Kg