TDM over IP / TDM over Ethernet / TDM over MPLS

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 E1 over Ethernet (VCL-E1oP) multiplexer may be used to provide legacy TDM services over Gigabit Ethernet optical fiber, or wireless Ethernet/IP networks.

E1 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 - E1 and E1oP Interface

• Supports 8 independent E1 interfaces
• IEEE-1588, External, Adaptive, Recovered clock and Asymmetrical (One-Clock and Two-Clock) and Internal options for the E1 TDM port synchronization. Automatic clock priority selection with fall back
• Supports CESoPSN payload mechanism to support the fractional E1 with data rate of 64Kbps to 2.048Mbps (DS0 timeslot level). User configurable data rate from 64kbps to 2048kbps, 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 an E1 channel.
• Supports SAToP payload mechanism to transport full E1 (transparent to the structure of the TDM frame useful for transporting framed / unframed E1 channels).
• Supports IETF-PWE3 (pseudo-wire), SAToP and CESoPSN transport mechanisms.
• Supports IP, MPLS and MEF8 (Metro Ethernet) tagging.
• Supports three E1 framing modes - Framed, Unframed and Multi-Framed with CAS signaling.
• 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 timestamps.
• Jitter and Wander conforms to G.823 / G.824 and G.8261 and TDM specifications.
• RJ45 - 120 ohms balanced E1 interfaces. Optional 75 Ohms BNC interface (120 Ohms to 75 Ohms interface converter cables provided).
• E1 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 (E1oP 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 (E1/E3) 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.