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VCL-E3oP-E3 (E3 over IP Version)
TDM over IP / TDM over Packet / TDM over MPLS

Product Overview

AceCom's 'VCL-E3oP' (E3 over IP) equipment is used to transport a single E3 interface over an IP, MPLS or Ethernet network. The VCL-E3oP' (E3 over IP) equipment, is equipped with a powerful PowerPC 400 MHz Processor which provides a highly reliable clock recovery mechanism for low jitter and wander control, even under variable network conditions.


'VCL-E3oP' is equipment provides 2 x GigE electrical ports along with 2 x Gigabit optical ports which allow the Users to implement 1+1 Ethernet link redundancy (Spanning Tree Protocol) and QoS by implementing Differentiated Services (Diffserv) and packet priority classification protocols for network optimization.

Purpose of TDM over Packet technology

Telecom companies and enterprise users can save significant network and equipment cost and generate additional revenue by offering different types of services over a single packet-switched infrastructure by the use of E3oP equipment. The E3oP equipment is also suitable for connecting to Ethernet / packet wireless equipment to achieve fast deployment of E3 services over wireless Ethernet networks. One particular application is to build E3 links with low cost Wireless LAN bridges, replacing expensive TDM / PDH microwave radios.


The 'VCL-E3oP' (E3 over IP) multiplexer may be used to provide legacy TDM services over Gigabit Ethernet optical fiber, or wireless Ethernet/IP networks.


How the TDM over Packet (E3 Interface TDM over IP Version) equipment works


The E3 data stream received on the E3 interface is converted by the E3oP engine of the E3oP 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 E3oP reconstructs the original data streams by removing the IP, MEF or MPLS headers and converts the Ethernet data packets back to E3 frames using highly reliable and accurate clock recovery mechanism. The 'VCL-E3oP' (E3 over IP) equipment uses standard E3 to packet and packet to E3 conversion mechanism using the SAToP technology.



  • Local Exchange

  • Internet Service Providers

  • Educational University

  • Multi-Site Enterprises

  • Cellular Service Providers

  • Government and Municipalities.


  • 19-Inch rack mountable

  • 1+1 Redundant Power Supplies

  • Extended Temperature Range: (-200 C to +600 C)

  • EMI / EMC Complaint

  • Switching Capacity upto 6 Gbps, non-blocking

  • MPLS Tagging

  • PWE3 (pseudo-wire)

  • SAToP

  • Ingress Rate Limiting

  • QoS

  • 1+1 Ethernet Link Redundancy (Hitless) Route Protection

  • Supports network latency / packet delay variation / jitter buffer of up to 60ms.

  • Supports “One-Clock” and “Two-Clock” operating modes

  • Adaptive, Loop-Timed, External Clock Synchronization Options with user programmable automatic fall-back priority clocking.

  • External Alarm - Dry contact relay alarms are also available at rear of the system to connect the system to an external alarm.

  • NMS (Network Management System) to monitor multiple units from single Central Location.

Key Features

  • Compact 19 inch rack mountable, 1U form factor (44mm)

  • Support one  independent E3 interface

  • 802.3 compliant 2 Optical Gigabit Ethernet ports (SFP) and 2 Electrical Gigabit Ethernet port

  • Supports point-to-point applications

  • 1+1 Ethernet Link Redundancy (Hitless) Redundant Route Protection

  • Supports both Framed and Unframed operating modes

  • Supports IETF-PWE3 (pseudo-wire) and SAToP transport mechanisms

  • Spanning Tree Protocol supported to provided fail safe Ethernet / IP Link

  • Supports SAToP payload mechanism to transport full E3 (transparent to the structure of the TDM frame useful for transporting framed / unframed E3 channels)

  • Supports network latency / packet delay variation / jitter buffer of up to 60ms.

  • Supports QoS based 802.1Q based VLAN tagging

  • Single / Double 802.1 VLAN tagging (Q in Q VLAN Tagging) user configurable

  • Supports QoS on 802.1p based packet priority

  • Single / Double 802.1 VLAN packet priority user configurable (2 levels)

  • User configurable MTU packet size. May be configured from 1 to 1800 Bytes.

  • Internal, External, Adaptive, Recovered clock and Asymmetrical (One-Clock and Two-Clock) options for the TDM port synchronization. Automatic clock priority selection with fall back.

  • Supports IP, MPLS and MEF (Metro Ethernet) addressing.

  • Switching Capacity up to 6 Gbps, Non-Blocking.

  • Supports up to 9000 Bytes Jumbo frames.

  • Supports Ethernet rate limiting on each port.

  • Port Trunking.

  • Supports Packet priority assignment (IP Diffserv / DSCP).

  • Jitter and Wander conforms to G.823 / G.824 and G.8261 and TDM specifications.

  • Supports ITU-T, G.751 and G.832 framing modes user selectable.  The G.832 framing mode may be used to transport ATM (Asynchronous Transfer Mode) data over E3 links.

  • Real Time battery backed clock with life in excess of 10 years.

  • Supports system temperature monitoring with High Temperature and Low Temperature alarms and SNMP Traps.

  • Supports SNMP V2 Monitoring and Traps.

  • Absolute and Differential times tamps.

  • UDP-specific “Special” Ethernet type.

  • In band VCCV ARP.

  • Broadcast DA

  • 75 Ohms BNC interface.

  • E3 Loopback facility for testing and diagnostics.

  • Self-test for checking system errors upon system bootup

  • RS232 COM port (DB9), USB and 10/100/1000 Base-T Ethernet Management port.

  • Supports TELNET and SNMP V2.

  • Supports CLI interface and GUI.

  • Complies with Defense specifications for secured password access and control.

  • Access log audit.

  • Event Logging.

  • Real Time Clock.

  • Clock Performance Alarms.

  • Network Performance Alarms.

  • Network Performance and Diagnostics.

  • Online / remote upgrade of firmware.

  • AC and DC power supply options.

  • Redundant power supply inputs.

 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 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

  • COM Port (RS232 Serial Port)

  • USB Port

  • 10/100/1000BaseT Ethernet Port (each multiplexer may be assigned an IP address and connected to a LAN / IP network for remote access and management through the 10/100/1000BaseT Ethernet Port for out-of-band configuration, management and access).

OAM: Operation and Management Ports

  • RS232 Serial Port

  • USB COM Port

  • 10/100/1000BaseT Ethernet for remote access.

Application Diagrams

Products Links

Technical specifications are subject to change without notice.
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