• TDM over IP / TDM over Packet / TDM over MPLS

VCL-T1oP (16T1 over IP/Ethernet GE Version), TDM over IP / TDM over Packet / TDM over Ethernet

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VCL-T1oP' E1 over Packet (16 T1 Port GE Version)
TDM to IP / TDM to Packet
Product Overview

VCL-T1oP' T1 over Packet (16 T1 Port GE Version)Orion Telecom Networks Inc. offers 'VCL-T1oP' T1 over Packet (16 T1 Port GE Version) TDM over IP equipment supports transmission of up to 16 x T1 links over IP / Ethernet, MEF or MPLS Pseudo-wire networks.

The 'VCL-T1oP' T1 over Packet (16 T1 Port GE Version) TDM over IP equipment, equipped with a highly reliable clock recovery mechanism for low jitter and wander control, even under variable network conditions.

16 x T1 Port T1oP (T1 over Packet) equipment provides 4x Gigabit electrical Ethernet ports along with 4 x Gigabit optical Ethernet ports out of which the user may select and use any 4, to implement 1+1 add-drop (Drop-Insert), Ethernet link redundancy (Rapid Spanning Tree Protocol and Ethernet Port Trunking) and QoS by implementing 802.1Q based VLAN, Differentiated Services (Diffserv / DSCP), Port based Priority and 802.1p packet priority classification protocols for network optimization.

The 'VCL-T1oP' T1 over Packet (16 T1 Port GE Version) TDM over IP equipment also optimizes on the network usage, such that the bandwidth used by the T1oP equipment on the packet network is limited to the corresponding to the number of T1 ports and the time-slots that are being transported over the Ethernet / packet network.

Purpose of TDM over Packet technology

Telecom companies and enterprise users can save network and equipment cost and generate additional revenue by offering different types of services over a single packet-switched infrastructure by the use of T1 over Packet/IP equipment. The T1 over IP equipment is also suitable for connecting to Ethernet / packet wireless equipment to achieve fast deployment of T1 services over wireless Ethernet networks. One particular application is to build T1 links with low cost Wireless LAN bridges, replacing expensive TDM / T1 microwave radios.

The 16 x T1 over Ethernet/Packet (VCL-T1oP) multiplexer may be used to provide legacy TDM services over Gigabit Ethernet optical fiber, or wireless Ethernet/IP networks.

How the TDM over Packet (16 T1 Port GE Version) equipment works

The T1 data streams received on the T1 interfaces are converted by the T1oP engine of the T1oP equipment to Ethernet data packets (of a fixed size) and transported over the Ethernet network with UDP / IP, MEF or MPLS headers. At the receiving end the T1oP reconstructs the original data streams by removing the IP, MEF or MPLS headers and converts the Ethernet data packets back to T1 frames using highly reliable and accurate clock recovery mechanism. The 'VCL-T1oP' (16 T1 port GE Version) offers the user a choice of standard, T1 to packet and packet to T1 conversion mechanisms that include SAToP and CESoPSN technologies.

Technical Specifications

Data Sheet (PDF)

T1oP and DS3oP / T3oP - IP Multiplexer / TDM over IP / Ethernet / Packet - Products Comparison Chart

Key Features - T1 and T1oP Interface

  • Supports 16 (or upto 32) independent T1 interfaces.
  • Internal, External, Adaptive, Recovered clock and Asymmetrical (One-Clock and Two-Clock) 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 6 Gbps, non-blocking
  • 4 GigE Ports.
  • 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 9000 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.
  • UDP-specific "Special" Ethernet type.
  • In band VCCV ARP.
  • Broadcast DA.

Few Key Features Explained

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.

Technical Specifications

Technical Specifications

Hardware Highlights

Hardware Highlights

  • 19-Inch rack mountable
  • 1U form factor (44mm high)
  • 1+1 Redundant Power Supplies, AC and DC, or AC plus DC
  • Redundant power supply inputs
  • Extended Temperature Range: (-20° C to +60° C)
  • EMI / EMC Complaint
  • Real time battery backed clock with life in excess of 10 years.

T1 Clock recovery and synchronization techniques

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

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 threshold and Low Temperature threshold alarms and SNMP Traps.
  • Supports SNMP V2 Monitoring and Traps.
  • Self-test for checking system errors upon system bootup.
  • 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.

Application Diagram

Application Diagrams