Alcatel-Lucent 1850 TSS-3 - Manual (Page 4)

Alcatel-Lucent 1850 TSS-3 Transport Service Switch 4
Multiple applications
Potential applications for the 1850 TSS-3 include:
• Ethernet demarcation
• Ethernet service aggregation
• Ethernet over PDH (EoPDH)
• Ethernet extension
In Figure 1, the 1850 TSS-3 is in the Ethernet-
demarcation role, with the demarcation point
shown as a dotted line, representing the point
where traffic crosses from the customer-owned
equipment to the service-provider-owned cus-
tomer premises equipment (CPE). At the demar-
cation point, the 1850 TSS-3 accepts the traffic
stream on the customer side and transports
this traffic to one or more network elements
in a carrier Ethernet network. This applica-
tion offers fault diagnostics and monitoring,
traffic rate limiting and virtual LAN (VLAN)
stacking (capability of offering multiple, discrete
VLANs over a single connection).
Carrier Ethernet
Network
(Ethernet or MSPP
or WDM-based)
Demarcation Demarcation
1850 TSS-3 1850 TSS-3
WDM – Wavelength Division Multiplexing
MSPP – Multiservice Provisioning Platform
Figure 1. Ethernet demarcation
In Figure 2, the 1850 TSS-3 is in an Ethernet service-aggregation configuration, in this case acting
as a carrier-class Ethernet switch, accepting multiple inputs from the customer side and aggregat-
ing them for onward transmission on the network side. Network-side redundancy can be provided
by Rapid Spanning Tree Protocol or Ethernet dual homing, two methods for providing automatic
backup paths.
Figure 2. Ethernet service aggregation
Metro Ethernet
Network
(Ethernet or MSPP
or CWDM-based)
Demarcation Demarcation
1850 TSS-3 1850 TSS-3
CWDM – Coarse Wavelength Division Multiplexing