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Data Sheet

ETX-102
Fast Ethernet Network Termination Unit

• SLA monitoring to assure delivery of contracted Ethernet services

Smart demarcation
point between the
service provider and
customer networks

• VLAN bridging and stacking with P-bit, DSCP or ToS traffic prioritization
• Complete Ethernet OAM and Layer-2 loopback functionality for reduced Opex
• Network link protectionbased on 802.3ad or dual homing for increased service
resiliency
• Up to two SFP-based Fast Ethernet network ports and up to four UTP subscriber
ports

ETX-102 is a network termination unit
(NTU) owned and operated by the service
provider and installed at the customer
premises. It serves as a clear demarcation
point between the user and operator
networks.
Providing monitoring anddiagnostic as
well as QoS capabilities, ETX-102 focuses
on the service and allows the service
provider to achieve end to end rather than
edge-to-edge service control.
IP address, IP mask and default gateway
can be automatically obtained using DHCP.

VLAN stacking can be used for traffic
separation between different users or
services, by defining a Service VLAN ID per
customer or service. WhenVLAN stacking
is used, a Service VLAN tag is added to the
user traffic and removed from network
traffic. Both Service VLAN ID and Service
VLAN priority can be defined.
The unit provides a user-configurable fault
propagation mechanism. When a link
failure is detected at the network port,
ETX-102 optionally shuts down a user port
until the network link is restored.

ETHERNET CAPABILITIESETX-102 features an internal bridge,
operating in VLAN-aware and
VLAN-unaware modes.

Innovative Access Solutions

ETX-102
Fast Ethernet Network Termination Unit

LAYER-2 LOOPBACK WITH MAC
SWAPPING

NETWORK INTERFACE REDUNDANCY

MANAGEMENT CAPABILITIES

The unit supports two redundancy modes:

Layer-2 link integrity can be tested by a
non-disruptive loopback with MAC addressswapping. When the loopback is activated,
ETX-102 exchanges source and destination
MAC addresses of the incoming packets.
This loopback can be performed per VLAN
(or EVC), it passes through Ethernet bridges
and does not disrupt traffic flows, which
are not being tested.

•

The unit can be managed using different
ports and applications:

ETHERNET OAM
ETX-102 provides two types ofEthernet
OAM:
•

•

End-to-end OAM based on 802.1ag
and Y.1731 enable Ethernet service
providers to monitor their services
proactively, measure end-to-end
performance and guarantee that the
customers receive the contracted SLA.
Fault monitoring and performance
measurement include Frame Delay,
Frame Delay Variation, Frame Loss and
Availability.
Single segment (link) OAM according to802.3ah for remote management and
fault indication, including remote
loopback, dying gasp, and MIB
parameters retrieval.

•

Link aggregation (1+1) based on
802.3ad
Dual homing (1:1), allowing ETX-102
to be connected to two different
upstream devices.

•

Local management via an ASCII
terminal connected to the RS 232 port

•

Remote inband management via user or
the networkports. Remote
management is performed using Telnet,
Web browser or RADview, RAD’s
SNMP-based management system.

QoS
Different service types require different
levels of QoS to be provided end-to-end.
QoS can be defined per subscriber as well
as per service. QoS has two aspects: rate
limitation and traffic prioritization.
Hierarchical rate limitation defines peak
traffic rate per user, portservice or per
traffic aggregate. This maximizes
bandwidth utilization.
For prioritizing user traffic ETX-102
features up to three separate queues,
which handle traffic with different service
demands, such as real-time traffic,
premium data or best-effort data. In case
of congestion, the relevant service receives
higher priority at the customer premises.
Traffic can be classified...