The ETX-205A features two Gigabit Ethernet network ports and two or four GbE user ports. All ports are SFP and UTP compatible with auto-detection of fiber and copper connections.The ETX-205A is also designed with CESoP and SAToP TDM pseudowire encapsulation capabilities to enable delivery of legacy TDM services over packet networks. PWE standard support includes MEF-8, UDP/IP and MPLS static labeling.
The ETX-205A combines Ethernet demarcation with test-head functionalities, featuring a complete Ethernet OAM suite that includes Ethernet Link OAM (IEEE standard 802.3-2005, formerly 802.3ah), Ethernet Service OAM (IEEE 802.1ag) and performance monitoring (ITU-T Y.1731). These are enhanced with a built-in RFC-2544 test generation engine for unidirectional and bi-directional testing of throughput, latency and frame loss. In addition, the device incorporates Layer 1, 2 and 3 diagnostic loopback capabilities with MAC and IP address swap.
Featuring ultra-fast, hardware-based processing capabilities, the ETX-205A performs OAM and PM measurements in less than 1 microsecond with maximum precision, offering the following powerful benefits:
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Immediate detection of loss of continuity (LOC) to ensure under 50 ms protection switching
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Highly accurate frame loss measurements with live-traffic testing
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Flow-level monitoring enables simultaneous processing of hundreds of OAM sessions
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Loopback testing at line rate
The ETX-205A offers advanced SLA assurance tools, including user-defined KPI (key performance indicators) threshold configuration, real-time SLA violation alerts and per-flow daily statistics reporting. Fault propagation mechanisms include subscriber port shutdown, as well as alarm indication signal (AIS) and remote defect indication (RDI) per Y.1731, to allow immediate notification and containment of service-affecting problems.
The ETX-205A also supports AC and DC power failure indication, using IEEE 802.3ah dying gasp or SNMP traps.
Synchronization and timing accuracy is critical for the quality of mobile services over asynchronous packet networks. These introduce packet delay variation and packet loss, which may lead to service disruptions, impaired cell hand-offs and excessive dropped calls.
Incorporating RAD’s SyncToP synchronization and Timing over Packet feature set, the ETX-205A utilizes standard technologies to ensure highly accurate clock recovery and distribution over both the physical and packet layers:
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Synchronous Ethernet (Sync-E) master and slave clock support per ITU-T G.8261-G.8264, with primary/secondary clock redundancy
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1588v2 Precision Time Protocol slave and transparent clock with hardware-based time-stamping
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1 PPS, E1/T1 and 2 MHz signal frequency extracted from Sync-E, E1/T1 or 1588v2 slave
The ETX-205A also supports simultaneous use of multiple timing and synchronization technologies, to reconcile different methodologies used in various network segments, thereby eliminating the need for costly upgrades. Such powerful clock transfer capabilities allow backhaul providers to ensure SDH/SONET-level performance, including frequency accuracy of 16 ppb (parts per billion) or better, without investing in dedicated hardware.
The ETX-205A features advanced softcore architecture for efficient handling of multi-priority traffic on a per-flow basis. The device enables multi-criteria traffic classification as well as metering, policing and shaping to help carriers rate-limit user traffic according to predefined CIR (committed information rate) and EIR (excess information rate) profiles. Enhanced quality of service is further supported by a hierarchical scheduling mechanism that combines Strict Priority (SP) and weighted fair queue (WFQ) scheduling, to efficiently handle real-time, premium and best-effort traffic. The ETX-205A also uses weighted random early detection (WRED) policy for intelligent queue management and congestion avoidance. Packet editing functionalities, such as color-sensitive P-bit re-marking, ensure metering continuity across color-aware and color-blind metro networks and WANs.
The ETX-205A offers various tools to ensure five nines (99.999%) availability and speedy restoration in the event of network outages. These include dual homing link redundancy and Link Aggregation (LAG) using 802.3ad LACP. In addition, path protection is supported with Ethernet Linear Protection Switching per ITU-T G.8031 to ensure end-to-end service is maintained when a fault is detected in one of the logical EVCs.
The EETX-205A features flexible management capabilities, including local management via an ASCII terminal (RS-232). In addition, remote management can be performed either inband using the network or user ports, or out-of-band using a dedicated management port, while maintaining separation between management and user traffic via the use of VLANs. Advanced FCAPS (Fault, Configuration, Administration, Performance, Security) and diagnostic tools are provided by RADview-EMS, RAD’s carrier-class element management system, via an SNMP-based GUI.
The device also supports a variety of access protocols, including CLI over Telnet, SNMP and TFTP. Incorporated security features include Secure Shell (SSH), Web-based Secure Socket Layer (SSL), SNMPv3, RADIUS and Terminal Access Controller Access-Control System (TACACS+), as well as management access control list (ACL).
The device is available in temperature-hardened enclosures and features AC/DC power supply redundancy to ensure resilient operations.
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