Cisco Port Adapters

ATM Port Adapter (PA-A1)


Data Sheet

PA-A1 ATM Port Adapter

The PA-A1 ATM Port Adapter is the first of a new generation of ATM interface modules for Cisco® 7200 and 7500 series routers.

Based on industry-leading port adapter technology, the PA-A1 ATM port adapter is a standards-based ATM interface that combines state-of-the-art performance with networking flexibility and investment protection, providing customers with one of the most cost-effective, yet powerful, ATM solutions in the industry.

The PA-A1 ATM port adapter is supported on any of the Cisco 7200 or VIP2-based 7500 series routers, and interoperates with any UNI-compliant ATM device. The PA-A1 ATM port adapter converts non-ATM LAN traffic into ATM cells and transmits to an ATM switch at rates up to 155 Mbps.

The PA-A1 ATM port adapter supports large enterprise and private ATM network configurations for data/bandwidth-intensive applications where traffic shaping is not required. Combined with both Cisco Internetwork Operating System (Cisco IOS) software services and the robust suite of legacy-protocols supported on Cisco 7200 and 7500 series routers, the PA-A1 ATM port adapter can support large virtual private networks (VPNs).


Standards-based ATM Interface

Standards-based interfaces ensure long-term interoperability with other standards-compliant ATM devices in the network. Important standards implemented in the ATM port adapter include UNI 3.0/3.1, ATM adaptation layer 5 (AAL5) and unspecified bit rate (UBR) service category for the transport of data traffic, RFC 1483 and 1577 for LAN internetworking, and ATM Forum F4 and F5 OAM flows for performance/fault monitoring.

High-Performance Data Transmission

The ATM port adapter can support up to OC-3 line speeds (155 Mbps) and has been tested in a Cisco 7500 configuration at over 150,000 64 byte packets per second transmissions speeds with no packets dropped. In addition, the ATM port adapter supports the equivalent of 512 SARs, over 2000 virtual connections (either PVC or SVC) from up to 256 VLANs.

Optimized for Virtual Private ATM Networks

The ATM port adapter is designed for customers who require increased transmission performance (compared to HSSI or FDDI) for "bursty" LAN traffic over private (that is customer controlled or owned) transmission lines.

Advanced Cisco Port Adapter Architecture for Cisco 7200 and 7500 Series Routers

The ATM port adapter is based on standard port adapter technology, enabling maximum flexibility and investment protection for Cisco 7200 and 7500 customers. The Cisco port adapter architecture provides important benefits in a LAN ATM network, including online insertion in Cisco 7200 platforms, reduced expense per interface module, increased reliability/availability/serviceability, higher port density, and improved overall performance.

Fully Integrated Cisco IOS Support

The ATM port adapter utilizes the full range of ATM features found in Cisco IOS software, the advanced software infrastructure that integrates Cisco products. Beyond the ATM feature set currently supported by Cisco IOS software (including ATM LANE, UNI, LAN Internetworking, etc.), ongoing ATM enhancements to Cisco IOS represent a major benefit enabling ATM port adapter customers to stay up-to-date with the ATM standard without changing hardware modules.


ATM Physical Interfaces

  • Single wide, native-ATM port adapter available on both Cisco 7200 and 7500 series routers

  • SONET/SDH OC-3c/STM-1 155-Mbps, two product versions:

    • Multimode fiber, SC duplex connector, up to three km (product number: PA-A1-OC3MM)

    • Single-mode fiber - intermediate reach, SC connectors, up to 15 km (product number: PA-A1-OC3SM)

  • Supports the equivalent of 512 simultaneous packet SARs

  • Complies with ATM Forum, ITU-T, and ETSI specifications

  • Supports Cisco IOS Online Insertion and Removal (OIR) feature on Cisco 7200 series routers, which allows interfaces to be removed or installed while system remains on line

ATM Virtual Interfaces

  • PVCs and SVCs

  • Virtual channel identifier and virtual path identifier (VCI and VPI) termination

  • AAL 5

  • UBR class of service

  • Supports up to 2048 virtual connections

  • Supports up to 256 VLANs

  • Standard ATM Forum UNI 3.0 (3.1 signaling available in Cisco IOS Release 11.2)

ATM Internetworking Services

  • Supports Cisco IOS software for ATM

  • Supports ATM Forum LAN Emulation (LANE 1.0) and VLAN internetworking services

  • Supports ATM ARP server for Classical IP and ARP over ATM support as defined in IETF RFCs 1577 and 1755

  • Supports multiprotocol routing over ATM for IP, Novell IPX, DECnet, AppleTalk Phases 1 and 2, CLNS, XNS, and Banyan VINES via multiprotocol encapsulation as defined in IETF RFC 1483

Network Management

  • OAM performance monitoring, failure detection, and fault-isolation calls, as specified by UNI 3.0/3.1 and I.610 for F4 virtual path and F5 virtual connection loopback

  • Supports ATM Forum Interim Local Management Interface (ILMI) for address prefix acquisition and ATM service address registration with UNI-compliant switches throughout the ATM network

  • Full SNMP agent and support for the IETF RFC 1213 interface MIB and future support for ATM MIB specifications

  • Supports the following MIBs:

    • SONET

    • AToM (IETF RFC 1695)

    • Virtual Terminal Protocol (VTP)

    • ATM Interim Local Management Interface (ILMI)

    • LAN Emulation (LANE)

  • CiscoWorks network management integration; PVC establishment through local management console or using SNMP and CiscoView

LED Indicators

  • Enabled LED, to indicate that the ATM port adapter is ready for operation

  • Receive (RX) cells LED, to indicate when the ATM port adapter is receiving ATM cells

  • Receive (RX) carrier LED, to indicate that the ATM port adapter is detecting carrier signal on the receiver cable

  • Receive (RX) alarm LED, to indicate that the router has detected an alarm condition

Regulatory Approvals

  • IEC 825 compliant

  • EN 55022, Class B, EN 50082-1

  • EN 60950

  • EN 41003

  • UL 1950

  • FCC Part 15, Class A

  • AS/NZS 3260/AS TS001

  • AS/NZS 3548, Class A

  • CSA 22.2-950

  • VCCI Class II

  • FDA Class 1 laser