Chapter 2 - System Architecture
Confidential and Proprietary Information of ZTE CORPORATION 21
F
IGU R E
1
W
ORK ING
P
RI N C IP LE O F T HE
ZXMSG
5200
TDM
switching
Ethernet switching
POTS
xDSL
Voice
compressing
CNIC
( NAT module
)
IP
network
ICS
MPR
ICS upper sub-card
In Figure 1, the outmost frame stands for the system border, and dotted
line frames present board functions. The ZXMSG 5200 provides POTS and
xDSL access at the subscriber side and provides IP uplink at the network
side.
Narrowband services like POTS enter the TDM of ICS board for switching.
Voices are converted into IP packets through MPR’s voice compressing
functions. The packets are switched by the Ethernet switching chip and
sent to CNIC for network address conversion, and then switched again to
enter the IP network from the uplink interface.
xDSL services enter the Ethernet switching chip of ICS board and then is
sent to the IP network through the uplink interface.
To Next Page
Loading...
