Technical Specification

Model: LF-7702A

Network Interface: Standard RJ45 input

Support Protocol: TCP/IP,UDP,IGMP (Multicast)

Audio Format: MP3

Sampling Rate: 8K~48KHz

Transmission rate: 100Mbps

Audio Mode: 16 bit  CD quality

Display Size: 7-inch

Screen Resolution: 800 x 480 Pixel

Screen Type: 65K Color DGUS Screen

Keyboard Type: virtual QWERTY Keyboard

Keyboard Input Type: Touch screen

Inscribed speaker impedance and power rating: 4Ω,2W

THD: ≤1%

Frequency response: 80Hz~16KHz  +1dB/-3dB

Weight: 1.2Kg

SNR: >65dB

PHONE OUT output impedance and power rating: 16Ω,2mW

LINE OUT Output Level: 1000mV Industry standard wire terminals

LINE OUT Output Impedance: 470Ω

LINE IN Input Sensitivity: 350mV, Industry standard wire terminals

MIC Input Sensitivity(Unbalance): 10mV

Short-circuit input: Dry contact input

Short-circuit output: Max 1A/30VDC Dry contact input

Working Temperature: 5℃~40℃

Working Moisture: 20%~80%Relative humidity, without condensation

Working Consumption: ≤6W

Power Input: ~190-240V 50-60Hz (power adapter); DC24V / 2A

Size: 200×158×163 mm


It is applied to a variety of call centers, alarm centers, duty room, leadership offices, meeting rooms and so on, to fulfill one way paging (point to point, to a single zone, or all zones)to a variety of network terminals, two-way intercom and monitoring.




*  With desktop design, it’s built-in 7 inch resistance touch screen by 800 × 480 dot matrix K600 + kernel 65K color, to fulfill clear display and sensitive touch. It will enter into sleeping and low-consumption states if no operation, with user-friendly man-machine interface.

*  With numeric and function keys interface. Support paging to single or multiple zones, all zones.  Support direct page or intercom with terminal, support environmental monitoring to any terminal, with distance up to 5 meters.

*  With embedded computer technology and DSP audio processing technology, high-speed industrial-grade chips, to ensure the start-up time less than 1 second.

*  Built in 1 channel network hardware audio decoding module that supports TCP / IP, UDP, IGMP (multicast) protocol to achieve 16-bit stereo CD quality network audio signal transmission.

*  It is compatible with routers, switches, bridges, gateways, Modem, Internet, 2G, 3G, 4G, multicast, unicast and other arbitrary network structures.

*  Support remote on-demand, support 1000 user defined audios for mute control (supports multiple signal amplification, mixing, three priority levels, tone control).

*  Support full-duplex two-way intercom function, built-in network echo cancellation module. Support two-way intercom between the terminals, with network delay less than 100ms, and suppress the network echo howling completely.

*  Support hints of asking for help signal ringing and flashing lights  , one key to accept the call, intercom, hands-free calls and receive broadcast, to achieve quick links.

*  Support multiple paging modes, including paging waiting, paging forwarding, no answer reminding.

*  Support for answering automatically, manual answering, and support for custom answer tone.

*  Support user-defined setting of time for call forwarding , no answer,call waiting.

*  Built-in 2W full-frequency hi-fi speaker, to fulfill two-way conversation and network monitoring.

*  One φ3.5 headphone jack and one φ3.5 MIC input socket, matching with 95% headphones and a portable microphone in the market.

*  With one  line output for external amplifier expansion, one line input for more audio sources transmission.

*  one way alarm output for short circuit trigger ,to cascade expansion alarm device; one way short circuit input,  to trigger preset voice prompts (or alarm).

*  The digital products is more convenient for extension, no limit by the geographical position, no need increase management equipment on control center, sharing network to save cabling, simple installation.

*  It supports remotely update to the hardware terminal, no need go to upgrade locally , to reduce maintenance burdens and make more simple operation.