ZL50120 Zarlink, ZL50120 Datasheet - Page 47

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

5.6
The Integrated Access Device (IAD) application consists of an IAD located at the curb or customer premise with an
Ethernet connection to an TDM aggregation box sitting in the access area of the network.
The ZL5011x in the IAD modem packetizes the T1/E1 or fractional T1/E1 TDM circuit into Ethernet CESoP packets.
The CESoP traffic is multiplexed with the native Ethernet data traffic from the IAD’s Ethernet ports onto the Ethernet
link to the aggregation equipment. The aggregator will split off the native Ethernet traffic from multiple IADs and
send the traffic on to packet network. The aggregator will contain a larger ZL5011x that will terminate multiple
CESoP connections from multiple IADs and send the TDM circuits to the PSTN, perhaps over a higher bandwidth
TDM pipe such as DS3.
The use of CESoP in this application allows the IAD to support both native Ethernet service as well as T1/E1
service in the same box, while converging both types of traffic onto a single Ethernet connection back towards the
provider.
6.0
The ZL5011x family provides the data-plane processing to enable constant bit rate TDM services to be carried over
a packet switched network, such as an Ethernet, IP or MPLS network. The device segments the TDM data into
user-defined packets, and passes it transparently over the packet network to be reconstructed at the far end. This
has a number of applications, including emulation of TDM circuits and packet backplanes for TDM-based
equipment.
Integrated Access Device
Functional Description
equipment
TDM
business
business
Small
Small
Ethernet
Ethernet
T1/E1
T1/E1
constant bit rate
TDM link
IAD
IAD
Figure 14 - ZL50115/16/17/18/19/20 Family Operation
Figure 13 - Integrated Access Device Using CESoP
TDM-Packet
conversion
interworking
CESoP
Transparent data flow between TDM equipment
function
Ethernet link
Ethernet link
CESoP
ZL50115/16/17/18/19/20
Zarlink Semiconductor Inc.
packet switched
Aggregation
network
TDM
47
TDM-Packet
conversion
interworking
N x T1/E1
CESoP
N x GIGE
function
Switching Platform
IP Edge Router or
Switch (Class 5)
Central Office
constant bit rate
Multi-Service
TDM link
equipment
PSTN
IP
TDM
Data Sheet