ELTEX TAU-8.IP - Product Design and Operating Principle

12 VoIP Subscriber Gateways
Figure 1 shows application diagram of the equipment via TAU-8.IP-W example.
Fig. 1 – TAU-8.IP-W Functional diagram
1.4 Product design and operating principle
TAU-4.IP/TAU-8.IP/TAU-8.IP-W subscriber terminal consists of the following subsystems:
- Controller featuring:
 Mindspeed digital signal processor;
 flash memory – 32MВ;
 SDRAM – 256МВ;
- SLIC subscriber unit module (4 or 8 FXS ports);
- Ethernet-module RJ-45 10/100/1000BASE-T WAN;
- Wi-Fi adapter (only for TAU-8.IP-W);
- USB-module.
Fig. 2 shows the device architecture diagram.
TAU-4.IP and TAU-8.IP architecture diagrams differ by the number of ports and presence of Wi-
Fi module in the TAU-8.IP-W.
The device runs under Linux operating system. Mindspeed digital signal processor performs
basic control functions. It enables IP-packets routing, IP-telephony operation, group traffic proxying
etc.