ZL50120 Zarlink, ZL50120 Datasheet - Page 44

• Manufacturer Part Number: ZL50120
• Description: 32 / 64 / 128 Channel CESoP Processors
• Manufacturer: Zarlink

5.3
The Fiber to the Premise (FTTP) application, shown in Figure 10, consists of an Ethernet Passive Optical Network
(EPON) deployed in the Wide Area Network (WAN). The Optical Network Units (ONU) sit at the curb while the
Optical Line Terminals (OLT) are located at the Central Office (CO). The ONUs are traditionally equipped with
Ethernet interfaces to provide video and data service to the customer premise.
The ONU includes a ZL5011x which enables the box to provide T1/E1 service to the customer. The ZL5011x is
used to establish CESoP connections between the ONU and the OLT to transparently carry TDM circuits across the
EPON. The ONU would use a smaller variant of the ZL5011x and the OLT would use a larger variant to aggregate
CESoP traffic from many ONUs and connect them at the CO to the PSTN. The native IP or Ethernet traffic from the
ONU would be split off at the OLT and connected to the packet network.
FTTP
Customer Premises
Ethernet
Ethernet
Ethernet
T1/E1
T1/E1
T1/E1
ONU
ONU
ONU
ZL50115/16/17/18/19/20
Figure 10 - EPON using CESoP
Fiber Links
Zarlink Semiconductor Inc.
CESoP
Splitter
Optical
44
GIGE Over
Fiber
OLT
Ethernet
T1/E1
PSTN
IP
Data Sheet