User Manual
U-SYS IAD208E(M) Integrated Access Device Chapter 1 System Overview
Huawei Technologies Proprietary
1-8
Module
Function
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
IAD208E(M), or different users in different
IAD208E(M)s.
VoIP service
processing module
It controls the interaction of user signaling
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.
