ZL50119 Datasheet, PDF (46/95 Pages) Zarlink Semiconductor Inc – 32, 64 and 128 Channel CESoP Processors

ZL50115/16/17/18/19/20
Data Sheet
5.5 Digital Loop Carrier
The Broadband Digital Loop Carrier (BBDLC) application, shown in Figure 12, consists of a BBDLC connected to
the Central Office (CO) by a dedicated fiber link running Gigabit Ethernet (GE) rather than by NxT1/E1 or DS3/E3.
The ZL5011x is used to emulate TDM circuits over Ethernet by establishing CESoP connections between the
BBDLC and 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 BBDLC are aggregated in the CO using a
larger ZL5011x variant, converted back to TDM circuits, and connected to a class 5 switch destined towards the
PSTN.
In this configuration T3/E3 services can also be provided. Using CESoP allows voice and data traffic to be
converged onto a single link.
POTS
T1/E1
Digital
Loop
Carrier
GIGE Over
Fiber
Dedicated
Fiber Links
GIGE Over
Broadband _Fiber
DLC
N x GIGE
IP Edge Router or
Multi-Service
Switching Platform
IP
Central
Office
N x T1/E1
Central Office
Switch (Class 5)
PSTN
CESoP
Figure 12 - Digital Loop Carrier using CESoP
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Zarlink Semiconductor Inc.