ZL50110 ZARLINK [Zarlink Semiconductor Inc], ZL50110 Datasheet - Page 46

• Manufacturer Part Number: ZL50110
• Description: 128, 256 and 1024 Channel CESoP Processors
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

4.4
The remote concentrator application, shown in Figure 8, consists of a remote concentrators connected to the
Central Office (CO) by a dedicated fiber link running Gigabit Ethernet (GE) or Ethernet over SONET (EoS) rather
than by NxT1/E1 or DS3/E3. The remote concentrators provide both TDM service and native Ethernet service to
the MTU/MDU.
The ZL50110/11/14 is used to emulate TDM circuits over Ethernet by establishing CESoP connections between the
remote concentrator and the CO. The native IP or Ethernet traffic is multiplexed with the CESoP traffic inside the
remote concentrator and sent across the same GE connection to the CO. At the CO the native IP or Ethernet traffic
is split from the CESoP connections at sent towards the packet network. Multiple T1/E1 CESoP connections from
several remote concentrators are aggregated in the CO using a larger ZL50110/11/14 variant, converted back to
TDM circuits, and connected to the PSTN through a higher bandwidth TDM circuit such as OC-3 or STM-1.
The use of CESoP here allows the convergence of voice and data on a single access network based on Ethernet.
This convergence on Ethernet, a packet technology, rather than SONET/SDH, a switched circuit technology,
provides cost and operational savings.
4.5
The cell site backhaul application, shown in Figure 9, consists of 2G, 2.5G and 3G base stations, co-located at a
cell site, connected to their respective 2G, 2.5G base station controllers and 3G radio network controller. The
traditional leased T1/E1 lines between the cell site and the base station controllers is now replaced by a packet
network such as fixed wireless or Gigabit Ethernet (GE) fiber, that may be owned by the carrier or accessed
through a service provider.
The ZL50110/11/14 would sit in a box either external to the base stations, or integrated in them, and would
transparently carry multiple T1/E1s to the base station controllers using CESoP connections. At the base station
controller location another ZL50110/11/14 would terminate the CESoP connection and provide the T1/E1 line to the
controllers.
The use of the ZL50110/11/14 would allow for lower cost transport between the two locations, due to the
replacement of the leased T1/E1 line cost. The CESoP connection would allow the T1/E1 to meet the strict timing
Remote Concentrator
Cell Site Backhaul
Multi-Tenant / Multi-Dwelling Units
10/100 Mbps
10/100 Mbps
Ethernet
Ethernet
T1/E1
Links
T1/E1
Links
Figure 8 - Remote Concentrator using CESoP
Concentrator
Concentrator
Remote
Remote
Zarlink Semiconductor Inc.
ZL50110/11/14
GIGE Over
GIGE Over
Fiber Links
Dedicated
CESoP
Fiber
Fiber
46
(Aggregation)
Central
Office
STM1- 4
Nx GIGE
T1/E1
Links
PSTN
IP
Data Sheet