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ETX-205A Carrier Ethernet Demarcation Device  

ETX-205A Carrier Ethernet Demarcation Device from RAD Data Communications

Key Point include:
· Multirate FE/GbE combo ports allow flexible service offering in one unit for capex and opex savings 
· Flow-based traffic management with H-QOS per EVC for SLA enforcement at customer premises, enabling MEF-certified EPL and EVPL services 
· Ethernet OAM and performance monitoring at wire speed, for reliable and accurate SLA monitoring, enabling efficient diagnostics and troubleshooting 
· Enhanced RFC-2544 analyzer for SLA verification, ensuring customer satisfaction immediately after turn-up 
· Synchronous Ethernet and IEEE-1588v2 PTP, seamlessly bridging synchronization domains 

The ETX-205A Carrier Ethernet  demarcation device offers Ethernet  demarcation functionality for business  services as well as cell-site gateway  functionality for 2G, 3G, and 4G/LTE  mobile backhauling applications. The RAD ETX-205A provides end-to-end service control and  performance management across packet networks. 

The ETX-205A delivers SLA-based business services to the customer premises over  native Ethernet interfaces, terminating  over any type of packet network. 

ETX-205A transports up to five Gbps of  user traffic while ensuring SDH/SONET-like  performance and Five Nines reliability. 

ETX-205A delivers IP VPN, VoIP, and dedicated Internet access over the same physical link as a Layer-2 LAN-to-LAN service, all with differentiated quality of service and end-to-end monitoring. It can also deliver E1, T1, and NxDS0 circuits. Incorporating RAD’s SyncToP™
synchronization and timing over packet feature set, ETX-205A utilizes standard technologies to ensure highly accurate phase and frequency recovery and distribution over both the physical and packet layers.

All RAD ETX-205A units are equipped with SFP/copper combo Ethernet ports, enabling flexible mixture of fiber optic and copper interfaces in one device. The SFP ports accommodate a wide range of Fast Ethernet and Gigabit Ethernet SFP transceivers, allowing service providers to seamlessly connect customers located at different distances from the device.

ETX-205A is used in the following

Ethernet demarcation device – ETX-205A separates the service provider network, the access provider network, and the customer network,
providing proactive service monitoring and easy fault localization for Ethernet and pseudowire services throughout the entire network (see Figure 1)
RAD ETX-205 Carrier Ethernet Demarcation device

Mobile demarcation device – ETX-205A is installed at the operator tower and controller sites equipped with Ethernet and PDH ports, connecting the 2G/3G/4G/LTE NodeB or eNodeB to the packet network, providing sophisticated synchronization and traffic management as well as service assurance capabilities, including proactive service monitoring and fault identification throughout the entire network (see Figure 2).
A mobile back hauling application with ETX-205A units

Traffic is mapped to the Ethernet flows using very flexible classification criteria based on incoming port (port-based all-to-one bundling), VLAN ID, VLAN priority, IP precedence, DSCP, Ethertype, and IP/MAC source/destination address. Classification is defined for both VLAN
tagged as well as untagged traffic. 

Layer-2 Control Processing 
The ETX-205A can be configured to pass through Layer-2 control frames (including other vendors’ L2CP frames, and with optional MAC change) across the network, to peer supported protocols (IEEE 802.3-2005 and LACP), or to discard the L2CP frames.

Featuring ultra fast, hardware-powered processing, ETX-205A performs OAM and PM measurements in line rate with maximum precision, offering the following powerful benefits:
· Immediate detection of loss of continuity (LOC), ensuring under 50 ms protection switching
· Highly accurate frame loss measurements of live traffic
· Flow-level (per CoS) monitoring, enabling simultaneous processing of multiple OAM sessions with E-LAN and E-Tree support
· Non-disruptive MAC and IP level loopback testing of network integrity.

ETX-205A provides these types of Ethernet OAM:
· Single-segment (link) OAM according to IEEE 802.3-2005 for remote management and fault indication, including remote loopback, dying gasp
with SNMP trap, and MIB parameter retrieval. Active and passive mode are supported.
· End-to-end connectivity OAM based on IEEE 802.1ag that enables Ethernet service providers to monitor their services proactively and guarantee that customers receive the contracted SLA
· End-to-end service and performance monitoring based on ITU-T Y.1731. Fault monitoring and end-to-end performance measurement include
delay, delay variation, frame loss and availability.

Traffic Management/QoS using the RAD ETX-205A:
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 three aspects: rate limitation, traffic shaping, and traffic prioritization.

Traffic policing is applied per flow or group of flows, and operates according to the dual token bucket mechanism based on user-configurable CIR + CBS and EIR + EBS. Traffic can be limited to the line rate or the data rate.

Every flow per EVC or EVC.cos has its own queues and scheduler supporting strict priority and weighted fair queues (WFQ). Queue blocks of eight queues per EVC are scheduled and shaped, forming an H-QoS model with shaped services and prioritized classes of service. The WRED mechanism is used for smart packet drop.

The VLAN priority bit in Ethernet frames can be modified at network ingress according to the ‘color’ of the frame. This allows service consistency and QoS continuity across color-aware (drop eligible enabled) as well as color-unaware networks.

Smart SFPs
Integrated management of MiRICi smart SFPs provides TDM (E1/T1/E3/T3/ OC-3/STM-1) connectivity over PDH or SDH legacy networks. ETX-205A supports configuration and statistic collection for the smart SFP TDM port.

ETX-205A enables delivery of legacy TDM services over packet networks.

TDM traffic can be encapsulated in the following modes:

· CESoPSN – CES (Circuit Emulation Services) over PSN, for framed E1/T1 traffic, per IETF RFC 5086
· SAToP – Structure-Agnostic TDM over Packet, for unframed E1/T1 traffic, per IETF RFC 4553.

The encapsulated pseudowire connections can be transmitted over the following types of PSN transport networks:
• UDP/IP (UDP over IP)
MEF 8 (Ethernet).

The following TDM OAM is provided:
· Connectivity verification.
· PW parameter validation
· Delay measurements with 1μsec resolution

ETX-205A forwards MEF-8 PW bundles via Layer 2 (E-Line). The device forwards UDP/IP PW bundles via Layer 3.

ETX-205 Quality of Service (QoS)
The quality of service prioritization technique differs according to the transport network type:
· MEF 8 – Outgoing pseudowire packets can be assigned to a queue directly. Priority is also defined by means of Layer-2 p-bit marking
· UDP/IP – Outgoing pseudowire packets can be assigned a ToS value that defines the egress priority queue and the Layer-2 p-bit marking. The priority queue of the egress router interface can be assigned directly or via DSCP.
Additionally, the Layer-2 p-bit marking can be done via DSCP value or assigned directly.


Dying Gasp
The RAD ETX-205A reports power failures to defined network management stations by sending an IEEE 802.3-2005 message or SNMP trap, thus enabling the unit to properly disconnect from the network with notification of the reason for the service problem.

Fault Propagation
The unit provides a user-configurable fault propagation mechanism in the network-to-user or user-to-network direction.

When a link failure is detected or OAM failure received, ETX-205A can shut down the affected port or forward the OAM failure message. The fault propagation mechanism enables routers and switches connected to both ends of the link to reroute the traffic to the redundancy

Link Protection 
ETX-205A provides the following network interface protection modes: 
· 802.3ad link aggregation (LAG), providing 1:1 link protection with Link Aggregation Control Protocol (LACP) support 
· Dual homing (1:1), allowing ETX-205A units to be connected to two different  upstream devices. 

Ethernet Path Protection 
ETX-205A applies standard ITU-T G.8031 Ethernet Linear Protection switching for fast protection of one or more EVCs from end to end. The standard implementation ensures interoperability with third-party devices. With standard APS functionality, Ethernet OAM messages provide bandwidth-efficient unidirectional or  bidirectional 1:1 protection. 

The EVC protection path can be configured on the same network port,  enabling the transport network to provide an alternative path for the working and protecting paths. It can also be configured on separate network ports, adding protection at the access  layer and enabling load balancing on network interfaces by splitting traffic between the two network ports. The performance of the hardware-based Ethernet OAM together with  protection switching for physical layer failure ensures fast protection in any scenario. The flow level protection provides a full set of manual commands for maintenance purposes.

ETX-205A implements the RAD SyncTop™ synchronization suite (see Figure 2), allowing cellular backhaul providers to meet the necessary synchronization requirements without the need to invest in dedicated timing equipment at every base station. ETX-205A timing features
· Synchronous Ethernet (SyncE) per ITU-T G.8261-G.8264
· IEEE 1588v2 Precision Time Protocol, slave, working in the following modes:
- Frequency –Slave reconstructsremote clock using sync and delay request/response from master to slave (no time-related status/alarms, or TOD)
- Time –Slave uses regenerated frequency, A high quality (PRC/PRS) CSM clock improves the time reconstruction. Time-relatedstatus/alarms and TOD are provided
- Frequency and time – Slave provides time information in addition to frequency.
· IEEE 1588v2 Precision Time Protocol transparent clock with hardware-based time stamping as well as ToD (time of day) synchronization
· External clock in/out interfaces (T3/T4) supporting 2MHz, 2M bits, and T1 frequencies
· 1 PPS, 10 MHz signal phase and frequency
clock redundancy with stratum 3/3E holdover performance.

Transmit Clock Signal
The E1 / T1 transmit clock source can be
one of the following:
· loopback –Clock is retrieved from the port's incoming (Rx) data
· internal – Clock is provided by system internal oscillator
· domainClock is provided by clock domain (relevant only for SYE or PTP option)
· pw – Clock is provided by PW bundle (relevant only for SYE or PTP option).

The PW source clock quality is limited to the following:
- Stratum 1/2 (default)
- Stratum 3E
- Stratum 3
- Stratum 4.

The following security protocols are provided by ETX-205A to ensure client server communication privacy and correct user authentication:
· SNMPv3
· RADIUS (client authentication)
· TACACS+ (client authentication, authorization, and accounting)
· SSH (secure shell communication session)
· SFTP (secure file transfer).

Command Line Interface (CLI)
Databases and scripts of commonly used commands can be easily created and applied to multiple units using command line interface.

Trap Synchronization
Traps are sent with sequence IDs to network manager groups, to enable the managers to detect when traps are lost and request the traps be sent again.

Zero Touch Provisioning
IP address and mask, default gateway, and software and configuration files can be automatically obtained using standard DHCP client functionality. This enables seamless node setup and configuration for quick and scalable network setup and deployment as well as configuration consistency when nodes must be replaced.

The ETX-205A can be managed using the  following ports and applications: 
· Local management via an ASCII  terminal connected to the RS-232 port 
· Out-of-band management via a  dedicated management port. 
· Remote inband management via user  or network ports routed via separate  VLANs, Telnet, or an SNMP-based  management system. 


The RAD ETX-205A provides a built-in RFC-2544  wire-speed traffic generator and analyzer  for unidirectional and bidirectional testing  of throughput, latency, and frame loss.  Based on standard OAM messages, the  tests can be simultaneously performed  over multiple flows, at the EVC.CoS level.  Enhanced RFC-2544 functionality provides  service-oriented KPI analysis. SLA  conformance is measured per service  bandwidth and packet size, within a  user-defined amount of time, for faster  service introduction. 

Loopback Tests 
Layer-2 and/or layer-3 network integrity  can be tested by a non-disruptive  loopback performed per flow, with  swapping of MAC address and optionally  IP address. When the loopback is  activated, ETX-205A exchanges the source  and destination MAC/IP addresses of the  incoming packets. This loopback passes  through Ethernet bridges (MAC address)  and routers (IP address). 


Product data sheet for the ETX-205A (pdf)

Immediate price quote - Call 727-398-5252 or e-mail cs@bestdatasource.com

Don't forget to ask about  RADCare support for your RAD products.

Other RAD sections of interest:
RAD Accessories, RAD ATM products, RAD Baseband modems and last mile access, RAD Cables & Misc, RAD Digital Service Access Devices ( FCD ), RAD Fiber Optic modems and Converters, RAD IP and Ethernet Access, RAD Kilomux Data, Voice, Fax and LAN integrating Multiplexers, RAD LRS Modem rackRAD MegaplexRAD Networks Management, RAD Optimux Fiber MultiplexersRAD Sharing Devices, RAD Short Range ModemsRAD T1/E1 Digital Cross Connects ( DACS ), RAD T1/E1 Digital Cross Connect (DACS) for single E1 / T1 applications, RAD TDMoIP, RAD Voice Interface Converters, RAD Voice Trunking Gateway

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Last modified: January 17, 2015
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