
76
managIng the Pstn transformatIon
CPEAccess Aggregation and IP Core Service Layer
RSU
Host
SDH network
Transit Exchange
International
TDM
Carriers
Target network
Architecture
Voice
IMS
Video
IPTV
Data
Internet
Customer DB
DNS
IPTV platform
AAA
DWDM
POP RT
POP RT
POP RT
POP RT
POP RT
IP MPLS
CORE RT
CORE RT
Transport layer
MTAS
SDS BCS
TDM n
EPG Games
Facebook
IPTV/VOD
PDH network
PSTN/ISDN
PS
N
IP Phone
GPON-OLT
DSLAM
Fix network
infrastructure
HGW
STB
PC ONT
Business CPE
Figure 4.3 General overview of the evolution of the legacy PSTN network toward NGN and IMS.