User Manual
U-SYS IAD108 Integrated Access Device
Chapter 1 System Overview
1-6
(DTMF)/ Frequency Shift Keying (FSK), Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG).
In terms of software structure, IAD108 consists of the following
functionality modules.
z
Management, maintenance and operation system module
z
Service access module
z
SPC service processing module
z
VoIP service processing module
z
Protocol processing module
z
Bottom layer drive module
The relations among the modules are shown in Figure 1-4.
Service
access
module
SPC processing module
TDM/DSP
TDM/DSP
VoIP service processing module
Protocol processing module
MGCP/H248
Bottom layer drive module
POTS
Management, maintenance and operation module
Figure 1-4
Functionality modules of IAD108
The functions of these modules are listed in Table 1-3.