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VCL-DS3 / T3 over IP / Ethernet
TDM over IP / TDM over Packet / TDM over MPLS

Product Overview

AceCom's 'VCL-DS3oP', DS3 (T3) over IP / Ethernet equipment provides transmission of one, point-to-point,
DS3 (T3)  link over an IP / Ethernet, MEF or MPLS network.

The 'VCL-DS3oP', DS3 (T3) over IP / Ethernet equipment is powered by 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.

The 'VCL-DS3oP', DS3 (T3) over IP / Ethernet 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 (Port Trunking),  Ethernet Route 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 network and equipment cost and generate additional revenue by offering different types of (Gigabit Ethernet, T1 and DS3) services over a single packet-switched infrastructure by the use of DS3oP equipment. As the networks migrate to an IP based infrastructure, the DS3 over Ethernet equipment becomes a valuable tool for enabling DS3 services for inter-connecting legacy DS3 equipment over Gigabit Ethernet optical fiber links, or over wired / wireless Ethernet/IP networks.

How the TDM over Packet (DS3 over Ethernet) equipment works

The DS3 channel received from the customer side equipment on the DS3 interface of the DS3 over Ethernet equipment is converted by its DS3oP engine 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 the DS3 over Ethernet DS3oP equipment reconstructs the original data streams by removing the IP, MEF or MPLS headers and converts the Ethernet data packets back to DS3 frames using highly reliable and accurate clock recovery mechanism. The 'VCL-DS3oP', DS3 over IP / Ethernet equipment uses standard SAToP, DS3 to packet and packet to DS3 conversion mechanism making it suitable for use over all types of Ethernet / IP or MPLS infrastructure.

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: (-200 C to +600 C)

  • EMI / EMC Complaint

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

DS3 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.

Key Features – DS3 and DS3oP Interface

  • Each terminal supports one DS3 interface.

  • Suitable for point-to-point applications.

  • Internal, External, Adaptive, Recovered clock and Asymmetrical (One-Clock and Two-Clock) options for DS3 synchronization. Automatic clock priority selection with fall back.

  • Absolute and Differential times tamps.

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

  • Supports DS3 Framed and Unframed formats.

  • Supports SAToP transport mechanism.

  • Supports network latency / packet delay variation / jitter buffer of up to 45ms.

  • Supports IP, MPLS and MEF8 (Metro Ethernet) tagging.

  • 75 Ohms BNC interface

  • DS3 Loopback facility for testing and diagnostics.

Key Features - Ethernet / IP Network Interface

  • Switching Capacity upto 6 Gbps, non-blocking

  • 4 GigE Ports.

  • Optical SFP based (1000BaseSX/LX) and Electrical (10/100/1000Base-T) Ethernet Port options.

  • 2 x 10/100/1000BaseT Copper Ports.

  • 2 x 1000BaseSX/LX Optical 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 Hitless Ethernet Link Redundancy - Port Trunking.

  • 1+1 Ethernet Route Redundancy - Spanning Tree Protocol.

  • IGMP Snooping.

  • Supports QoS, 802.1p based packet priority.

  • Tagged/Un-Tagged/Un-Modified 802.1Q Mode.

  • Q-in-Q Tagging.

  • User configurable MTU (DS3oP payload) packet size. May be configured from 1 to 1800 Bytes.

  • Switch supports jumbo frame sizes of up to 9000 Bytes.

  • Port based and Tag based VLANs.

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

  • Supports QoS on 802.1p based packet priority.

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

  • UDP-specific “Special” Ethernet type.

  • In band VCCV ARP.

  • Broadcast DA.

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.

  • UDP-specific “Special” Ethernet type.

  • 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 Diagrams

  • Application 1 : LANs, WANs, MANs, IP Satellite and Wireless Ethernet

  • Application 2 : DS3 Link Redundancy - Using Port Trunking / Bonding

  • Application 3 : DS3 Link Redundancy - Using Spanning Tree Protocol

Products Links

Technical specifications are subject to change without notice.
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