Brand: Etross or OEM brand
Model no.: Etross-MX801
Product name: Ringing SLIC MODULE

Features:
Single supply voltage: +3.3V to +5.0V

Integral high efficiency DC/DC converter

Transformerless 2-wire to 4-wire conversion

Integral ringing generator

Constant current feed

Constant current feed

On-hook transmission 

On-hook transmission

Easy to use, Low external component count

Simplified protection in “on-premise” applications

Applications:

Voice Over Internet Protocol (VoIP)

Cable Modems

Key Telephone System

IP Gateway system

Wireless Desktop Phone

Set-top Box System

Voice Over DSL (VoDSL)

Short Loop Access Platforms

Remote Subscriber Units

Other Terminal Adapters