User Manual
U-SYS IAD108 Integrated Access Device
Chapter 1 System Overview
1-7
Table 1-3
Functions of modules in IAD108
Module Function
Management, maintenance
and operation module
It is responsible for maintenance, operation and
management of the whole IAD108 system.
Service access module
It implements the selection, summary and report of
analog user and digital user information, and
transmits the messages issued by the service
module.
SPC service processing
module
It establishes and maintains the SPCs between the
different users in the same IAD108, or different
users in different IAD108s.
VoIP service processing
module
It controls the interaction of user signalings and the
Time Division Multiplexing (TDM)/ Digital Signal
Processing (DSP) user module, and implements
the interconnection with the Media Gateway
Controller (MGC).
Protocol processing
module
It implements the processing of MGCP/H248
protocol stack and the adaptation of protocols.
Bottom layer drive module
It drives various function chips on the CSP.