• Suitable as a carrier owned multi-service/ATM demarcation device (CLE - Customer Located Equipment) or as an enterprise access concentrator
• ACE-2002 allows service providers to offer converged WAN services in a fully ATM-featured product
• Enables seamless migration of traditional services (LAN, voice) to ATM
• As an enterprise ATM access concentrator, ACE-2002 provides a service platform to which routers, PBXs, LAN, video codec and other corporate devices can be connected
• Offers advanced bandwidth and traffic management capabilities. These capabilities ensure high utilization of the ATM links while preserving QoS
• Implements ITU-T I.610 OAM standard to provide end-to-end service control
• Supports all ATM service categories: CBR, VBR (rt and nrt), UBR and ABR
• High resilience due to ATM uplinks protection and dual hot-swappable power supplies
• ACE-2002 can be managed either in-band or out-of-band
• ACE-2002 can be managed by RADview, RAD's HP-OV/UNIX network management application
• ACE-2002 can use a wide variety of ATM UNI modules, including E3/T3 and STM-1/OC-3 modules
• ACE-2002 offers a wide range of non-ATM modules, including LAN (10/100 BaseT) and CES (E1/T1, 4xE1/T1, E3/T3)
• Compact, 1U high; suitable for mounting in 19" racks

TRAFFIC MANAGEMENT

• ACE-2002 operation modes:

• Monitoring: The unit monitors and gathers statistical information on the user and the network traffic

• Policing: The unit compares the user traffic with the Service Level Agreement (SLA) parameters. In case the user traffic exceeds the SLA parameters, violating cells can be tagged or discarded.

TRAFFIC SHAPING

• Both user and network operator benefit from shaping a bursty traffic. For the user, more traffic can pass through the link at no additional cost. For the operator, shaping enables better statistical efficiency while keeping the same backbone equipment and QoS. Two modes of Traffic Shaping are supported by ACE-2002.

• VBR (rt and nt) traffic shaping: This shaping employs dual leaky bucket for each one of its 30 shaped connections. This is an optional mode that must be ordered (requires an additional hardware module). This option includes a 148,000 cell buffer.

• CBR traffic shaping: ACE-2002 offers a built-in mechanism which supports up to 800 shaped connections. This mechanism employs an enhanced per-VC-queuing mechanism.

• In addition, ACE-2002 supports a number of layers of traffic scheduling. The layers are set per VC, per VP, per interface and per user interface.

• In both previous cases, ACE-2002 schedules the traffic to meet a pre-defined threshold to ensure fair distribution of bandwidth between different conditions, while preserving the individual connection requirements.

IMPROVED RELIABILITY

• ACE-2002 provides improved service reliability and resilience using different built-in mechanisms. The first one, OAM (Operation, Administration and Maintenance) mechanism enhances support in the ATM standards. It includes alarm surveillance (AIS, RDI), continuity check, performance monitoring and loopback activation. The second mechanism is ATM link protection. The third provides hot swapping capability of user and network modules, and the ACE-2002 redundant power supplies.

• ACE-2002 OAM support complies with I.60 standard. AIS and RDI (part of standard) are system indicators for faulty conditions in the network.

• In case these indicators are detected in user or network modules, ACE-2002 alerts the system management. Another mechanism to check the service availability is the continuity check. ACE-2002 sends a cell periodically over a predefined VP or VC and verifies that the VP or VC are activated. Both AIS, RDI and Continuity check can be activated on each open VP and VC defined in the ACE-2002 database.

• ACE-2002 monitors the current performance management (PM) characteristics of the ATM network. The monitoring includes end-to-end measurement of QoS parameters such as error rate and cell loss ratio. ACE-2002 can generate F4/F5 loopback cells (LB) on up to 128 VPs or VCs.

• ACE-2002 supports SDH/SONET mechanisms for fault isolation and system fault alerts - F1-F5. F1-F3 layers enable performance monitoring and fault localization on user and network physical links. F4-F5 layers enable the same functionality on the ATM layer.
  Using the loopback option, ACE-2002 can measure minimum, maximum and average delay and delay variation. The loopback function can also be used for fault isolation. The loopback cells can be sent with source and destination address and may be looped at any network element that was pre-assigned with a loopback point address.

• In order to improve the product resilience, ACE-2002 can be connected to the public network from two different modules.

• ACE-2002 includes two protection mechanisms. A uni and bi-directional ASP 1+1 physical layer protection mechanism that allows the last physical segment from the service exchange to the customer premises to be protected (based on standard transport methods, such as SDH or SONET).

• ACE-2002 supports both NNI and UNI cell headers with full bit range of VPI/VCI fields. Altogether, ACE-2002 can support up to 1024 connections, either VPC and/or VCC. This capability enables to use ACE-2002 as a concentrator for large corporate networks or as a junction between two public networks. In addition, a full switching capability is available between each of the VCs or VPs (either from user or network) to obtain maximum flexibility in connection assignment.

• To increase the QoS, ACE-2002 includes VP tunneling. This enables bundling multiple VCCs into a single VPC, while maintaining all the VCC QoS characteristics and OAM (Operation, Administration and Maintenance) capabilities at F4 and F5 layers.

• ACE-2002 supports up to 10 VP tunnels. Each tunnel can be shaped either as CBR or VBR connection. It can be defined with end-to-end OAM flow and act as a regular VP in the public network.

• To protect the public network from over-subscription and to obtain available network resources, it is beneficial for both user and service provider to agree upon a Service Level Agreement (SLA) contract. To ensure the contract is honored by both sides, ACE-2002 collects information on the various parameters mentioned in the SLA. It also processes the information in real time and convert it into statistical information. The statistics are collected every 15 minutes for 24 hours (or a total of 96 intervals). All detected events are logged and time stamped on a non-volatile memory. The information is collected by management systems in the network. It can be used later on for fair billing accounts.

• In order to send long frames (mainly IP traffic) over ATM networks efficiently, ACE-2002 supports Early Packet Discard (EPD) and Partial Packet Discard (PPD) mechanisms. In case cells are lost or discarded, and are part of a long frame, ACE-2002 can drop the rest of the cells that belong to the same frame. This prevents overload of the network resources by non-valid cells.

• ACE-2002 supports Call Admission Control (CAC) that prevents network congestion by checking the network resource when a request to open a new connection is received. In case the network resources are insufficient, the request for a new connection is rejected.

• ACE-2002 can be managed either locally or remotely by using different ports and applications.

• ACE-2002 can be managed locally by connecting an ASCII terminal to the RS-232 port available on the front panel. The same port can be used to connect a dial-up modem so ACE-2002 can be remotely managed. ACE-2002 supports PPP protocol for SNMP management over RS-232. Another option is the use of a dedicated VC connection for management.

• A management workstation located anywhere in the ATM public network can be connected to a remote customer device and perform configuration, monitoring and diagnostics using a dedicated VC.

• ACE-2002 can be managed by and report to up to 8 different managers simultaneously. This enables to view the network status from different locations.

• The RADview HPOV network management application provides the capability to monitor, configure, fault isolate and present network statistics using graphical user-friendly display.
  This UNIX-based application alerts in real time on the service availability and on network faulty conditions. The real time clock of the management application is synchronized with all the managed units. It enables to determine the real time of events and provides the ability to sort events chronologically. Also the statistical collection of events can be synchronized so that the 15 minute intervals of statistical information can be sorted according to a realistic sequence. The system events and the statistical information are registered in a log file.
  The RADview application can hold a complete pre-defined configuration of ACE-2002 to shorten and simplify its field installation. After ACE-2002 is installed, it is possible to remote download the complete configuration from anywhere in the network.

ACE-2002/#/@/&

ATM Network Termination Unit

RM-11

Hardware for mounting units in a 19" rack