User Manual
U-SYS IAD108 Integrated Access Device
Chapter 1 System Overview
1-5
Indicator Color
Name
Meaning
WAN Green
Indicator for
uplink
interface
When the unplink interface is
normal, it is on, and if no network
cable is inserted, it is off.
1–8 Green
Indicator for
telephone user
When the user on the
corresponding interface off-hooks, it
is lighted up.
The external interfaces provided by IAD108 are located on the
back panel as shown in Figure 1-3.
(1) Local power supply interface
(2) Upstream interface (3), (4) Data user interface
(5)–(12) POTS ports
(13) Local maintenance serial port
Figure 1-3
External interface of IAD108
1.3.2 Software Structure
The software system of IAD108 consists of the main CPU
software and DSP software of the CSP. As the core of IAD, the main
CPU software implements the call control of the whole system,
management and maintenance function and forwarding of media
flow. The DSP software mainly implements the coding and decoding
of voice, detection and generation of Dual-tone Multifrequency