Cisco SPA-1XOC48-ATM (1-Port OC-48c/STM-16c ATM Shared Port Adapter) Full Official Technical Specification

1. Product Overview

Official Full Designation

Core Product Definition

1. Framing modes: SONET STS-48c (OC-48c) or SDH STM-16c framing, software selectable
2. Line scrambling: Standard SONET/SDH payload scrambling compliant with ANSI and ITU-T specifications
3. Complete SONET overhead byte processing (B1/B2/B3 parity, J1 path trace, C2 payload label, FEAC path maintenance channel)
4. Full real-time SONET alarm detection, BER performance monitoring and 24-hour historical error statistics logging (LOS, LOF, AIS, FERF, LCV, TCA threshold crossing alarms)Cisco
5. Independent port clock domain: user-selectable internal free-running clock or network-derived loop timing.

1. Full ATM Forum-compliant service class support: CBR, VBR-rt, VBR-nrt, UBR, UBR+
2. Per-Virtual Circuit (VC) and per-Virtual Path (VP) traffic shaping, policing and tagging for granular QoS differentiation
3. High-capacity SAR engine for IP/Frame Relay/Ethernet payload segmentation into 53-byte ATM cells and reassembly
4. Extensive ATM virtual connection scaling support for thousands of PVC/SVC/Soft VC endpoints
5. ATM interworking standards: RFC 1483 (AAL5 LLC/SNAP and VC-mux), RFC 2684, Frame Relay ATM Service Interworking (FR-ATM IWF)
6. MPLS over ATM (MPoATM) support, including MPLS label switching over ATM VP/VC tunnels, L3VPN, 6PE/6vPE and traffic engineering FRR fast reroute.

SKU Naming Breakdown

1. SPA: Shared Port Adapter, Cisco I-Flex modular expansion interface architecture
2. 1XOC48-ATM: 1 = single independent physical port; OC48 = OC-48c/STM-16c 2.488Gbps SONET/SDH optical interface; ATM = native clear-channel ATM transport dedicated hardware
3. Standard spare suffix = : SPA-1XOC48-ATM= for factory-new standalone spare units
4. Cisco Refresh refurbished variant suffix -RF: SPA-1XOC48-ATM-RF

Product Lifecycle Notice

• Global official release year: 2005
• End-of-Sale (EoS) Status: Discontinued hardware; Cisco permanently ceased new production of SPA-1XOC48-ATM
• Direct upgrade replacement hardware: Next-gen high-density multi-port OC ATM SPA series, OC-48 POS SPAs for packet migration use cases
• Minimum required operating system versions:
  IOS 12.2(33)SR for Cisco 7600 / Catalyst 6500 Series routers/switches
  IOS-XR 3.6 for Cisco XR 12000 and CRS Series backbone routers
• Software maintenance policy: Only critical security vulnerability patches will be released for customers holding active Cisco SMARTnet or DNA Advantage service contracts; no new feature development will be implemented for this legacy OC-48 ATM SPA
• Legacy hardware status: End-of-life equipment; certified refurbished SPA modules, validated IOS/IOS-XE/IOS-XR firmware images and 24/7 priority Cisco TAC engineering support remain available through authorized global Cisco distribution partners.

Supported Router & Switch Platform Compatibility

1. Cisco Catalyst 6500 Series Multilayer Switches (SIP-400/600)
2. Cisco 7600 Series Service Routers (SIP-400 / SIP-600)
3. Cisco XR 12000 Series Internet Backbone Routers
4. Cisco CRS Series Carrier Routing Systems

Key Deployment Restrictions

1. OIR function prerequisites: Full zero-traffic-impact Online Insertion and Removal requires deployment of the minimum specified IOS/IOS-XE/IOS-XR software releases. Outdated firmware versions may trigger temporary ATM circuit outages or cell drops during SPA hot-swap maintenance operations.
2. Single-height form factor limitation: This SPA occupies one single-height SPA bay on any compatible SIP card; multiple SPA-1XOC48-ATM modules can be installed in adjacent single-height slots on the same SIP.
3. Optical transceiver compatibility lock: Only Cisco-certified SFP-OC48 optical transceivers (SFP-OC48-SR / IR1 / LR2 single-mode) are supported; third-party unqualified SFPs cause link flapping, SONET alarm misreporting and hardware initialization failuresCisco.
4. SIP shared fabric bandwidth constraint: Multiple SPAs installed on a single SIP processor share the internal Multigigabit Fabric backplane bus bandwidth. Simultaneous full line-rate OC-48 ATM traffic across multiple ATM SPAs on the same SIP may introduce minor forwarding latency under extreme peak aggregate load conditions.
5. Clear-channel ATM operation limitation: This SPA does not support channelized SONET tributary multiplexing (T3/E1/DS0 subrate splitting) nor native POS packet-over-SONET transport; channelized OC-48 deployments require SPA-1XCHOC48 series variants.

Standard Factory Complete Package Contents

1. SPA-1XOC48-ATM single-height single-port OC-48c/STM-16c ATM Shared Port Adapter main circuit card
2. Anti-static ESD protective storage bag and custom shock-absorbent foam internal packaging
3. Hardware quick-start installation guide covering ESD electrostatic discharge prevention procedures, SIP slot OIR insertion/removal workflows, SFP optical transceiver installation best practices, IOS/IOS-XE/IOS-XR ATM and SONET interface configuration command reference examples
4. Global product regulatory compliance, electrical safety, electromagnetic interference (EMI) and laser safety certification documentation packet

Core Integrated Functional Capabilities

1. Single Independent Clear-Channel OC-48c / STM-16c Optical ATM Interface
   The SPA provides one physical full-duplex optical interface via a single hot-swappable SFP LC duplex receptacle, fully compliant with ANSI T1.105 SONET OC-48 and ITU-T G.707 SDH STM-16 standards, operating at a raw line rate of 2.48832 Gbps. The port operates in independent clear-channel mode without internal tributary channel splitting, dedicated exclusively to ATM cell transport.
   Key per-port SONET physical-layer hardware features:

• Software-selectable framing: STS-48c SONET / STM-16c SDH framing
• Payload scrambling compliant with ANSI T1.105 and ITU-T G.707
• Full SONET overhead byte processing suite: B1/B2/B3 bit-interleaved parity error counting, J1 path trace identifier, C2 payload signal label, FEAC path maintenance control channel
• Configurable line build-out attenuation and optical power budget matching for SR/IR/LR SFP transceivers
• Independent port clock domain: user-selectable internal free-running clock or network-synchronized loop timing
• Full real-time SONET alarm detection and reporting list: LOS loss of signal, LOF loss of frame, LAIS line alarm indication signal, PAIS path alarm indication signal, LRDI line remote defect indicator, PRDI path remote defect indicator, LREI line remote error indicator, PREI path remote error indicator, LOP loss of pointer, NEWPTR new pointer event, PSE/NSE payload stuffing events, PUNEQ path unequipped, PPLM payload label mismatch, BER threshold crossing alarm (TCA)
• 24-hour historical error and alarm statistics logging maintained on-board the SPA hardware for offline performance auditing.

• RFC 1483 / RFC 2684 AAL5 ATM adaptation layer: LLC/SNAP multiplexing or VC-mux encapsulation
• ATM Frame Relay Service Interworking (FR-ATM IWF) for leased-line FR to ATM service convergence
• MPLS over ATM (MPoATM) label switching, MPLS L3VPN and traffic engineering FRR fast reroute.

1. Full Line-Rate Hardware Offloaded Multi-Service ATM Processing
   Dedicated on-board SONET serial framer and high-performance multi-channel ATM SAR FPGA fully offloads all workloads from the host router’s main route processor CPU for the single OC-48 port, including:

• SONET section/line/path overhead byte processing and B1/B2/B3 parity error calculation
• SONET payload scrambling/descrambling, FEAC/MDL maintenance channel extraction and insertion
• STS-48c / STM-16c framing and deframing
• ATM AAL5 segmentation and reassembly (SAR) of IP, Frame Relay and Ethernet payloads into standard 53-byte ATM cells
• Per-VC and per-VP ATM traffic shaping, policing, CIR/EIR bandwidth metering and CoS marking for four ATM service classes (CBR/VBR-rt/VBR-nrt/UBR)
• ATM PVC/SVC/Soft VC connection state management and virtual connection scaling
• IP header checksum calculation, AAL5 CRC payload error verification
• Multi-level MPLS label stack insertion and stripping, IPv4/IPv6 routing lookup
• Hierarchical Layer 3 QoS traffic classification, marking, policing, shaping and priority queuing
  The dedicated ATM SAR hardware sustains full non-oversubscribed 2.488Gbps OC-48 line-rate bidirectional mixed voice/data ATM cell processing with zero cell loss under maximum full-load payload traffic conditions.

1. Comprehensive ATM & SONET Physical-Layer Feature Suite

   Native hardware and software feature support for carrier-grade clear-channel OC-48 ATM core aggregation deployments:

   STS-48c SONET and STM-16c SDH framing, ANSI/ITU-T compliant payload scrambling, complete SONET overhead byte processing, full SONET alarm detection and 24-hour error statistics logging, independent port clocking modes, optical power budget matching for SFP transceivers.

   Supported ATM transport and service features:

   ATM Forum-compliant four service classes (CBR, VBR-rt, VBR-nrt, UBR/UBR+), per-VC/per-VP traffic shaping and policing, RFC 1483 AAL5 encapsulation, Frame Relay ATM service interworking, MPLS over ATM (MPoATM), L3VPN, 6PE/6vPE, MPLS traffic engineering and FRR fast reroute, PVC static virtual circuits, SVC switched virtual circuits, soft VC auto-signaling.
2. Advanced Layer 2, Layer 3 & MPLS Carrier-Grade Service Features

   Fully integrated enterprise and service provider routing and packet transport capabilities: static and dynamic IP routing protocols (BGP, OSPF, EIGRP, IS-IS), policy-based routing (PBR), NAT address translation, EoMPLS Ethernet over MPLS pseudowires, VPLS virtual private LAN service, MPLS traffic engineering (TE) and segment routing. The SPA supports up to 5000 source/destination MAC accounting entries for ingress and egress traffic metering per SPA hardware module.
3. Hardware-Accelerated Hierarchical QoS Traffic Management

   On-board dedicated multi-queue QoS processing logic enables per-port, per-ATM-VP, per-ATM-VC and per-flow traffic classification, marking, policing, shaping and priority queuing running at full OC-48 line rate without host CPU involvement.

   Supported QoS mechanisms: 802.1p CoS marking, DSCP IP precedence marking, weighted fair queuing (WFQ), low-latency queuing (LLQ) for real-time VoIP and video streams, hierarchical traffic policing and shaping for service provider SLA bandwidth tier enforcement policies, four-class ATM service level bandwidth shaping.
4. Zero-Disruption Online Insertion and Removal (OIR) Hot-Swap Maintenance

   Complete OIR compliance supports hot-swap replacement of the entire SPA card within the SIP slot, with no requirement to power cycle the host router chassis. All other active SPA interfaces hosted on the same SIP processor continue forwarding IP packets and processing multi-service ATM traffic without interruption during hot-swap maintenance procedures, eliminating lengthy planned maintenance windows for production enterprise WAN and carrier ATM core networks.
5. Unified IOS / IOS-XE Single Pane CLI Management

   All SPA hardware configuration, single-port OC-48 SONET and ATM interface provisioning, ATM virtual circuit setup, Layer 2 transport mode setup, QoS and ACL policy deployment, real-time traffic throughput monitoring, fault troubleshooting and OC-48 physical-layer performance telemetry functions are fully managed through the host chassis’s native Cisco IOS or IOS-XE command-line interface (CLI). Network operators can view SPA hardware operational status, OC-48 port alarm state, bidirectional ingress/egress throughput statistics, ATM cell error counters, packet/frame error counters and hardware fault alarms alongside all other router SIP/SPA interfaces within a single consistent unified management environment.
6. Comprehensive Real-Time Diagnostics & Remote SNMP Monitoring Toolset

   Built-in IOS diagnostic utilities dedicated to single-port OC-48 ATM interface troubleshooting: real-time link up/down state reporting, bidirectional ingress/egress byte, IP packet, Frame Relay frame and ATM cell traffic counters, granular error logging (CRC errors, AAL5 payload errors, ATM cell loss, SONET BER error events, policy discard packets, ATM PVC congestion drops), per-flow traffic metering and OC-48 SONET physical-layer performance monitoring.

   The SPA implements standard Cisco serial and ATM interface SNMP MIBs (RFC 3896 DS3-MIB, CISCO-FRAME-RELAY-MIB, ATM-MIB, IF-MIB, CISCO-ENTITY-ALARM-MIB) for remote network monitoring. Automatic SNMP trap generation is triggered for critical OC-48 port link failures, SONET alarm events, ATM VC congestion alarms, SPA hardware faults and BER threshold violation events.

2. Hardware & Performance Specifications

Core Single Clear-Channel OC-48/STM-16 Optical ATM Port Technical Specifications

OC-48 SONET / STM-16 SDH Optical ATM Interface

• Industry Standard Compliance: ANSI T1.105 SONET OC-48, ITU-T G.707 SDH STM-16, ATM Forum UNI 3.1/4.0, RFC 1483, RFC 2684, RFC 3896 DS3-MIB
• Line Rate: OC-48 full-duplex 2488.32 Mbps; STM-16 full-duplex 2488.32 Mbps (software selectable framing mode)
• Framing Modes: STS-48c SONET framing, STM-16c SDH framing
• Payload Scrambling: ANSI T1.105 / ITU-T G.707 standard payload scrambling enabled by default
• Optical Transceiver Support: Hot-swappable SFP OC-48 single-mode transceivers: SFP-OC48-SR (short reach), SFP-OC48-IR1 (intermediate reach), SFP-OC48-LR2 (long reach)
• Optical Connector: Duplex LC receptacle for SFP optical module
• Cable Impedance: Single-mode optical fiber (ITU-T G.652 compliant)
• Line Build-Out (LBO): Software-configurable optical attenuation matching SR/IR/LR SFP power budgets
• Clock Synchronization Modes: Internal free-running clock, network-derived loop timing (selectable per port)
• FEAC / MDL: Full far-end alarm control channel and maintenance data link support (SONET mode only)
• CRC Options: AAL5 32-bit CRC payload error detection (mandatory for ATM)
• Jumbo Frame Support: Maximum configurable AAL5 payload MTU size of 9000 bytes for IP packets
• SONET / SDH Alarm Monitoring Set: LOS loss of signal, LOF loss of frame, LAIS line alarm indication signal, PAIS path alarm indication signal, LRDI line remote defect indicator, PRDI path remote defect indicator, LREI line remote error indicator, PREI path remote error indicator, LOP loss of pointer, NEWPTR new pointer event, PSE/NSE payload stuffing events, PUNEQ path unequipped, PPLM payload label mismatch, BER threshold crossing alarms (TCA)
• Loopback Test Modes: Internal SPA local diagnostic loopback, line-side OC-48 SONET network loopback, ATM cell loopback
• ATM Service Class Support: CBR constant bit rate, VBR-rt real-time variable bit rate, VBR-nrt non-real-time variable bit rate, UBR unspecified bit rate, UBR+ with minimum cell rate guarantee
• ATM Virtual Connection Scaling: Supports thousands of simultaneous PVC, SVC and soft VC virtual connections
• ATM SAR Engine Performance: Full line-rate 2.488Gbps AAL5 segmentation and reassembly with zero cell loss at maximum OC-48 payload load

Layer 2 / Layer 3 Forwarding Performance Metrics

• Line Rate Throughput Per Port: Full non-oversubscribed OC-48 2.488Gbps bidirectional multi-service mixed ATM cell and IP packet processing capacity
• MAC Accounting Entries: Up to 5000 source/destination MAC traffic metering entries per SPA card
• Supported Packet Encapsulations: IPv4, IPv6, MPLS multi-depth label stacks, EoMPLS pseudowires, RFC 1483 AAL5 ATM encapsulation, Frame Relay ATM interworking
• QoS Queue Architecture: Per-port multi-level egress priority queues with LLQ low-latency scheduling for real-time voice and video traffic
• ATM QoS Shaping Granularity: Independent per-VC and per-VP traffic shaping with configurable CIR/EIR bandwidth thresholds

Front Panel LED Indicator Definitions

1. STATUS LED (Global SPA Hardware Operational State)
   • Off: No power supplied to the SPA card, SPA power supply fault
   • Solid Amber: SPA powered on, undergoing boot initialization, firmware download process or minor hardware fault detected
   • Solid Green: SPA powered, fully recognized and registered by the host SIP/route processor, all on-board OC-48 SONET framer, ATM SAR and multi-service processing FPGAs fully initialized and operational, the OC-48 ATM port ready for ATM cell and IP traffic forwarding
   • Blinking Green: SPA undergoing IOS/IOS-XE/IOS-XR hardware initialization sequence during chassis power-on boot or post-OIR hot-swap reactivation
2. Per-Port C/A (Carrier/Alarm) LED (Single OC-48 Port Link & Alarm Status)
   • Off: No SFP optical transceiver installed in the port slot, port administratively disabled, Loss of OC-48 Signal (LOS) detected or SFP optical hardware failure
   • Solid Amber: SFP optical module installed, port enabled, but at least one critical SONET/ATM alarm state active (LOF, AIS, FERF, LOP, PPLM etc.) with no stable valid OC-48 carrier signal or ATM service fault
   • Solid Green: Stable error-free OC-48 SONET physical carrier link established with remote optical node, no active critical SONET or ATM alarms
3. Per-Port A/L (Active/Loopback) LED (Single OC-48 Port Traffic & Loopback Activity)
   • Off: No active multi-service ATM cell or IP packet traffic transmitting/receiving on the port; no loopback diagnostic mode enabled
   • Solid Green: Port enabled, normal operation with no loopback activated
   • Solid Amber: Port enabled, loopback diagnostic mode (local or line-side SONET loopback) is active
   • Blinking Green: Active bidirectional multi-service traffic (IP packets, Frame Relay frames, ATM cells) transmitting and receiving over the OC-48 optical port link; blink frequency proportional to aggregate traffic load

Electrical & Thermal Specifications

Power Consumption

• Typical idle power draw (SPA powered on, no SFP optical transceiver installed, zero traffic load): ~32 Watts typical total module power dissipation
• Typical medium-load power draw (SFP OC-48 optical module installed, mixed moderate ATM voice/data traffic): ~35 Watts typical total power dissipation
• Maximum full-load power consumption (OC-48 port running full line-rate bidirectional multi-service mixed ATM cell traffic, performance monitoring telemetry continuously active): ≤37.1 Watts maximum peak thermal dissipation
• Power Supply Input: 3.3V DC power supplied exclusively via the SIP slot internal backplane bus; no external auxiliary power connectors on the SPA hardware module

Thermal & Environmental Operating Parameters

• Certified Continuous Operating Temperature Range: 5°C to 40°C (41°F to 104°F) standard enterprise and carrier datacenter central office equipment room ambient environment
• Extended Short-Term Operating Temperature Range: -5°C to 70°C (23°F to 158°F) temporary commercial wide-temperature operating range
• Non-operating Storage Temperature Range: -40°C to 70°C (-40°F to 150°F) unpowered long-term storage conditions
• Operating Relative Humidity: 5% to 85% RH, non-condensing ambient humidity
• Storage Relative Humidity: 5% to 95% RH, non-condensing unpowered storage humidity
• Operating Altitude: Certified operational altitude range from -60m to 2,000m (-200ft to 6,500ft); extended validated altitude support up to 4,000m (13,000ft)
• Cooling Architecture: Fully passive thermal dissipation design with integrated stamped aluminum heatsink mounted directly on the SPA printed circuit board; no onboard rotating cooling fans. Chassis horizontal forced airflow from the host router’s internal cooling fans provides continuous convection cooling across the SPA heatsink under full peak OC-48 line-rate multi-service ATM traffic load.
• NEBS Compliance: Meets GR-63-Core, GR-1089-Core NEBS environmental and surge immunity standards for carrier central office permanent deployment

Physical Form Factor & Weight

• Form Factor: Single-height Shared Port Adapter (SPA) form factor, occupies one single-height SPA bay on all compatible SIP processor cards
• Bare SPA Module Net Weight (excluding SFP optical transceivers, optical fiber cables, cabling adapters and retail packaging): Approximately 570 grams (0.57 kg / 1.26 lbs)
• Physical External Dimensions (Width × Depth × Height): 171.5mm (6.75in) × 184.9mm (7.28in) × 39.6mm (1.56in)

3. Regulatory & Compliance Certifications

1. Electrical Safety Standards: UL 60950-1, CSA C22.2 No. 60950-1, EN 60950-1, IEC 60950 CB Scheme, ACA TS001, AS/NZS 3260, GB 4943 Chinese national IT equipment safety standard
2. Electromagnetic Compatibility (EMC/EMI) Standards: FCC CFR Title 47 Part 15 Class A, VCCI Class A ITE, EN55022 Class A, CISPR 22 Class A, ICES-003 Class A, CISPR 24, EN 61000 series surge, ESD and radiated immunity standards
3. Optical Laser Safety Standard: IEC 60825-1 Class 1 laser safety certification for SFP OC-48 optical transceiver ports
4. T3/E3 Serial Interface & SPA Architecture Compliance: ANSI T1.105 OC-48 SONET standard, ITU-T G.703 / G.707 SDH STM-16 standard, RFC 3896 DS3-MIB, RFC 1490 Frame Relay, RFC 1662 PPP, ATM Forum UNI 3.1/4.0 ATM specifications, Cisco I-Flex SPA/SIP modular interface architecture specifications
5. Environmental Compliance Directives: EU RoHS Restriction of Hazardous Substances directive full compliance, EU WEEE Waste Electrical and Electronic Equipment recycling directive compliant

4. Core Deployment Advantages

1. Modular I-Flex Single-Height Single-Port OC-48 ATM SPA Architecture Delivers Maximum Network Deployment Flexibility

   The SPA-1XOC48-ATM leverages Cisco’s industry-standard I-Flex modular SPA/SIP design, enabling network architects to mix and match single-port OC-48 ATM SPAs, OC-3/OC-12 ATM SPAs, POS optical SPAs, T3/E3 serial SPAs and Ethernet SPAs on a single SIP processor card. This eliminates the requirement to deploy dedicated fixed-port OC-48 ATM line cards for single OC-48 ATM core aggregation or POP edge deployments. Network operators can customize interface port density to precisely match site-specific single OC-48 ATM core, voice trunking or service provider edge interconnection demands, drastically reducing upfront capital expenditure and eliminating costly hardware over-provisioning for carrier ATM core and aggregation network nodes. The standardized single-height SPA form factor enables shared spare parts inventory across multiple Cisco router platforms, lowering long-term operational OpEx costs.
2. Full Hardware Offloaded Multi-Service ATM Processing Eliminates Host Route Processor CPU Performance Bottlenecks

   All OC-48 SONET physical-layer overhead processing, B3ZS/HDB3 line encoding, STS-48c/STM-16c framing, FEAC maintenance channel signaling, ATM AAL5 SAR segmentation/reassembly, Frame Relay LMI signaling, IP routing lookup, MPLS label switching, QoS traffic scheduling and ACL packet filtering operations are fully offloaded to the SPA’s dedicated on-board OC-48 SONET serial framer and high-performance ATM SAR FPGA chipset running at full OC-48 line rate. This removes all CPU-intensive multi-service ATM workload burdens from the host router’s main route processor, preserving critical CPU resources for core control-plane functions including BGP/OSPF routing protocol adjacency maintenance, device management and system logging. It prevents routing protocol instability, excessive packet/ATM cell latency and customer ATM voice/data trunk service outages during peak full OC-48 aggregate mixed voice/data ATM traffic load conditions.
3. Zero-Disruption OIR Hot-Swap Maintenance Minimizes OC-48 ATM Core Network Downtime

   Complete Online Insertion and Removal (OIR) functionality supports hot-swap replacement of the entire SPA card within the SIP slot without power cycling the host router chassis. All other active SPA interfaces hosted on the same SIP processor continue forwarding IP packets and processing multi-service ATM traffic without interruption during hot-swap maintenance procedures. This eliminates costly multi-hour planned maintenance windows for production enterprise WAN and carrier ATM core networks, drastically improving mission-critical OC-48 synchronous voice and data ATM trunk circuit service availability and reducing routine network equipment maintenance overhead for NOC network operations teams.
4. Unified Multi-Service Carrier-Grade ATM Feature Suite Supports End-to-End Converged Voice & Data Deployments

   The SPA integrates a complete portfolio of enterprise and service provider-grade networking features fully implemented in dedicated hardware acceleration, eliminating performance limitations of slow software-only packet processing. Native support for clear-channel OC-48 SONET/SDH physical-layer processing, AAL5 RFC 1483 ATM encapsulation, four-class ATM service level bandwidth shaping, Frame Relay ATM service interworking, MPLS over ATM (MPoATM), L3VPN, 6PE/6vPE, MPLS traffic engineering FRR fast reroute, hierarchical multi-level QoS scheduling and LLQ low-latency real-time voice prioritization enables operators to deploy fully converged carrier ATM core aggregation, voice over ATM trunking, legacy DSU multiplexer interconnection and leased-line migration workloads over a single OC-48 optical ATM SPA interface. This removes the requirement to deploy separate dedicated OC-48 interface hardware for distinct network service types and further reduces total network hardware total cost of ownership (TCO).
5. Passive Fanless Heatsink Thermal Architecture Delivers Superior Long-Term Hardware Reliability and Low Lifecycle Maintenance Costs

   The SPA-1XOC48-ATM utilizes a fully passive convection cooling design with a solid integrated aluminum heatsink, containing no onboard rotating cooling fans. This completely eliminates all mechanical hardware failure risk vectors associated with fan motor wear, dust accumulation, fan power supply faults and airflow blockages, enabling stable 24/7 continuous unattended operation in remote unmanned central office equipment closets, carrier data center racks and off-site regional ATM aggregation router locations with minimal long-term on-site maintenance requirements. Low idle and peak full-load power consumption reduces overall router chassis energy draw and enterprise/carrier datacenter cooling operational energy costs over multi-year hardware service lifecycles, delivering substantial long-term total cost of ownership savings for large-scale distributed multi-site enterprise and carrier ATM network deployments.
6. Unified IOS/IOS-XE Single-Pane CLI Management Simplifies Multi-Platform Network Operations and Troubleshooting

   All SPA hardware configuration, single-port OC-48 SONET and ATM interface provisioning, ATM virtual circuit setup, Layer 2 transport mode setup, OC-48 physical-layer alarm monitoring, QoS and ACL policy deployment, real-time traffic throughput monitoring, IP/ATM cell error counter analysis and OC-48 physical-layer performance telemetry tracking operations are fully managed through the host chassis’s native Cisco IOS or IOS-XE command-line interface. Network administrators can monitor the SPA’s operational status, OC-48 optical link health and multi-service ATM trunk circuit traffic statistics alongside all other router SIP/SPA interfaces within a single consistent unified management environment, eliminating the need for separate standalone interface management software or dedicated out-of-band monitoring infrastructure for single-port OC-48 ATM SPA line cards. This drastically reduces network administrator training overhead, streamlines network change management workflows and accelerates critical enterprise OC-48 ATM leased-line circuit fault resolution troubleshooting for distributed enterprise and carrier ATM core network environments.

Supplementary Product Specification Notes

UNSPSC Classification Code

K9 Security Compliance Note

Factory Hardware Warranty Terms