Key Highlights:

• Under 4ms latency on the E1 / T1 channels
• IEEE-1588v2 Clock Recovery (SECLK)
• Synchronize ToD (Time of Day) and Frequency of all nodes to a centralized / common GPS Receiver
• Synchronization to an External Clock (ECLK)
• Automatic clock priority selection with fall back
• Jitter and Wander conforms to and exceeds G.823 / G.824 and G.8261 and TDM specifications
• Password Protection
• Supports SSH and Radius for access control
• The 8 x T1 over Ethernet (VCL-T1oP) multiplexer may be used to provide legacy TDM services over Gigabit Ethernet optical fiber, or wireless Ethernet/IP networks.

Hardware Highlights

• 19-Inch rack mountable
• Available in 2U and 3U form factors – with various connector options
• 1+1 Redundant Power Supplies, AC and DC, or AC plus DC
• Extended Temperature Range: (-400 C to +600 C)
• EMI / EMC Complaint
• Real time battery backed clock with life in excess of 10 years

T1 Clock recovery and synchronization techniques

• IEEE-1588 Clock Recovery (SECLK)
• Synchronization to an External Clock (ECLK)
• Adaptive Clock Recovery (ACLK)
• Recovered Clock (RCLK) / Loop-Timed Clock
• Asymmetrical (One-Clock and Two-Clock) Clock
• Synchronization to an Internal Clock
• Automatic clock priority selection with fall back
• Plesiochronous Clocking.

Key Features - T1 and T1oP Interface

• Supports 8 independent T1 interfaces
• IEEE-1588, External, Adaptive, Recovered clock and Asymmetrical (One-Clock and Two-Clock) and Internal options for the T1 TDM port synchronization. Automatic clock priority selection with fall back
• Supports CESoPSN payload mechanism to support the fractional T1 with data rate of 64Kbps to 1.544Mbps (DS0 timeslot level). User configurable data rate from 64kbps to 1544kbps, in steps of 64kbps.
• CESoPSN payload mechanism feature allows the user to optimize the packet switched network by limiting its usage to the corresponding number of time slots carried by a T1 channel.
• Supports SAToP payload mechanism to transport full T1 (transparent to the structure of the TDM frame useful for transporting framed / unframed T1 channels).
• Supports IETF-PWE3 (Pseudo-wire), SAToP and CESoPSN transport mechanisms.
• Supports IP, MPLS and MEF8 (Metro Ethernet) tagging.
• Supports two line codes - AMI and B8ZS.
• Supports three T1 framing modes - Framed ESF, Framed SF and Unframed.
• Supports point-to-point, point-to-multipoint and drop and insert applications.
• Supports network latency / packet delay variation / jitter buffer of up to 512ms.
• Absolute and Differential times stamps.
• Jitter and Wander conforms to G.823 / G.824 and G.8261 and TDM specifications.
• RJ45 - 100 ohms balanced T1 interfaces.
• T1 Local and Remote Loop-back (RLOOP) facility for testing and diagnostics.

Key Features - Ethernet / IP Network Interface

• Switching capacity upto 9 Gbps, non-blocking
• 4 GigE Uplink Ports - Copper, Fiber, or Copper plus Fiber
• Optical SFP based (1000Base-FX) and Electrical (10/100/1000Base-T) Ethernet port options.
• 4 x 10/100/1000BaseT Copper Ports.
• 4 x 1000BaseFX Optical Fiber Ports.
• (may use a combination / mix of any 4 Copper or Fiber Ports)
• Point-to-point and point-to-multipoint applications based on IP addressing.
• Supports drop and insert applications.
• Port Control Ingress Rate Limiting.
• 1+1 Ethernet link redundancy
• Rapid Spanning Tree Protocol.
• Ethernet Port Trunking.
• User configurable MTU (T1oP payload) packet size up to 1800 Bytes.
• Configurable payload size for each bundle.
• Switch supports jumbo frame sizes of up to 9728 Bytes.
• Supports 802.1Q based QoS, 802.1p based packet priority.
• Port Based Priority (Classifying Services).
• DSCP and 802.1Q / 802.1p based packet tagging and prioritization.
• Flow Control in an Ethernet Packet Networks (Regulating Traffic).
• Port / Customer based bandwidth allocation (Port Rate Limiting).
• MPLS, MEF and UDP tagging for Ethernet traffic.
• Separate IP Address for TDM traffic and equipment management.
• VLAN tagging for TDM traffic and equipment access / management.
• Single / Double 802.1 VLAN tagging (Q in Q VLAN Tagging) - User configurable.

Additional Key Features Explained

IEEE-1588 Features -

• IEEE-1588v2 Clock Recovery (SECLK)
• Synchronize ToD (Time of Day) and Frequency of all nodes to a centralized / common GPS Receiver
• Synchronization to an External Clock (ECLK)

Port Based Priority (Classifying Services) - Port based Priority feature allows the user to assign priority to the individual Ethernet ports, so that traffic can be regulated according to the port on which that service is connected. The user may also assign highest priority to TDM (T1/DS3/T3) traffic and Ethernet services on a lower priority.

VLAN Based Priority (Classifying Services) - VLAN based Priority feature allows the user to assign priorities to different VLANs carrying various types of services / traffic according based on user categories and preferences. The user may assign highest priority to TDM (T1/DS3/T3) traffic and Ethernet services on a lower priority. User may also configure which TDM link should be given preference over the other TDM links when the uplink bandwidth falls below a particular threshold.

Flow Control in an Ethernet Packet Networks (Regulating Traffic) - Flow Control feature allows the user to regulate Ethernet traffic flow to minimize packet loss due to data bursts.

Port / Customer based bandwidth allocation (Port Rate Limiting) - Port based Ingress Ethernet Rate Limiting allows the user to assign the bandwidth as per port / service requirements, in addition to provisioning traffic by using 802.1Q and 802.1p VLANs and packet priority.

Applications

Applications – Cellular / Mobile

• To backhaul 2G and 3G/LTE services using a single Ethernet infrastructure
• Port based Priority feature allows the user to assign priority to the 2G and 3G/LTE traffic ports
• VLAN based Priority feature allows the user to assign priorities to different types of service traffic according to their application.
• User can assign highest priority to TDM traffic to ensure un-uninterrupted transmission of T1 links even under heavy 3G traffic conditions.
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• User can configure a particular TDM link should be given preference over the other TDM links.
• Flow Control feature allows the user to regulate the Ethernet based flow to minimize link disruptions and lost packets due to data bursts.
• Ingress Ethernet Rate Limiting allows the service provider to assigned the bandwidth as per customer requirements
• Separating traffic by applications and classes by assigning 802.1Q based VLANs.
• To synchronize cell sites:
• Frequency synchronize all BTSs and BSCs with the MSC using IEEE-1588 phase synchronized frequency
• Distribute Time-Of-Day across all nodes of the network with 500ns (0.5 micro-second) accuracy
• Distribute 1 PPS across all nodes of the network
• Distribute NMEA information across all nodes of the network.

Applications – Power and Transportation

• Backhaul legacy voice, low speed legacy data and high speed Ethernet services using a single Ethernet infrastructure
• Frequency synchronization across the entire network with IEEE-1588 phase synchronized frequency
• Distribute Time-Of-Day across networks with 500ns (0.5 micro-second) accuracy
• Distribute IRIG-B time across the entire network for synchronizing all RTUs, Synchrophasors / PMUs and Protection Relays to a common network clock
• Distribute Time-Of-Day across all nodes of the network with 500ns (0.5 micro-second) accuracy
• Applications Include
• Smart Grid
• Air Traffic Control
• Railways
• Road Traffic Management.

System Management, Monitoring and Alarm Interfaces

• NMS (Network Management System) to monitor multiple units from single Central Location.
• External Alarm - Dry contact relay alarms are also available at rear of the system to connect the system to an external alarm.
• Supports system temperature monitoring with High Temperature and Low Temperature alarms and SNMP Traps.
• Supports SNMP V2 Monitoring and Traps.
• Self-test for checking system errors upon system boot up.
• Event Logging.
• Clock Performance Alarms.
• Network Performance Alarms.
• Network Performance Monitoring and Diagnostics.
• Online / remote upgrade of firmware.

System Access, Control and Management Options

• Telnet
• CLI Control Interface (HyperTerminal or VT100)
• SNMP V2 Traps (MIB File provided)
• Windows based GUI (Graphical User Interface) for easy configuration, management and access. Ability to monitor multiple units from a single NMS
• Password Protection.

OAM: Operation and Management Ports

• RS232 Serial Port.
• USB COM Port.
• 10/100/1000BaseT Ethernet Management for In-band remote access.