ZL50120 Zarlink, ZL50120 Datasheet - Page 46

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

5.5
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.
Digital Loop Carrier
T1/E1
POTS
Broadband
Carrier
Digital
Loop
DLC
Figure 12 - Digital Loop Carrier using CESoP
Fiber Links
Dedicated
GIGE Over
GIGE Over
CESoP
Fiber
Fiber
ZL50115/16/17/18/19/20
Zarlink Semiconductor Inc.
Central
Office
46
N x T1/E1
N x GIGE
Switching Platform
IP Edge Router or
Switch (Class 5)
Central Office
Multi-Service
PSTN
IP
Data Sheet