Cisco SPA-1XOC12-ATM Full Official Product Description

1. Product Overview

Official Full Name & SKU

SKU Breakdown

1. SPA: Shared Port Adapter, Cisco I-Flex modular expansion architecture
2. 1XOC12: 1 independent OC-12c / STM-4c physical optical port
3. ATM: Dedicated clear-channel ATM transport hardware, non-channelized design
4. Standard spare suffix:SPA-1XOC12-ATM=for standalone factory-new spare modules

Supported Router & Switch Platform Compatibility

1. Cisco Catalyst 6500 Series Multilayer Switches
2. Cisco 7600 Series Service Provider Edge Routers
3. Cisco ASR 1000 Series Aggregation Services Routers
4. Cisco XR 12000 Series Internet Backbone Routers
5. Cisco CRS Series Carrier Routing Systems

• Cisco IOS: 12.2(18)SXE and later for Catalyst 6500 / 7600 platforms
• Cisco IOS-XE: Supported for ASR 1000 Series
• Cisco IOS-XR: 3.4.1 and later for CRS / XR 12000 series routers

Key Deployment Restrictions

1. Single-height form factor: Occupies one single-height subslot on any compatible SIP carrier card. Multiple SPA modules can be populated on one SIP for multi-port OC-12 ATM aggregation.
2. Clear-channel only design: Does not support channelized OC-12 tributary splitting (DS0/T1/E1 subrate multiplexing). Channelized OC-12 ATM deployments require dedicated channelized SPA variants.
3. SFP compatibility lock: Only Cisco-certified OC-12 SFP transceivers are officially supported, including MM, SR, IR-1, LR-1, LR-2 optics. Unqualified third-party SFPs cause link flapping, SONET alarm misreporting, optical layer initialization failures, and unsupported feature behavior.
4. Bandwidth capacity: Single OC-12 port delivers total line rate bandwidth of 622.08 Mbps bidirectional; the SPA fully supports full line-rate traffic without cell loss under standard fabric scheduling.

Standard Factory Package Contents

1. SPA-1XOC12-ATM single-height 1-port OC-12 ATM Shared Port Adapter main PCB module
2. ESD anti-static protective storage bag and shock-absorbent OEM foam packaging
3. Hardware installation quick-start guide covering ESD protection procedures, OIR hot-swap maintenance steps, SFP transceiver installation, and IOS/IOS-XR/IOS-XE ATM & SONET configuration command references
4. Global regulatory compliance documentation packet (electrical safety, EMC electromagnetic compatibility, Class 1 laser safety, NEBS carrier-grade certification)

2. Core Hardware & Functional Capabilities

Single Independent OC-12c / STM-4c Optical ATM Interface

Per-Port SONET/SDH Physical Layer Features

• Software-selectable framing mode: STS-12c SONET or STM-4c SDH framing
• Standard ANSI/ITU-T payload scrambling enabled by default for optical signal stability
• Complete SONET section/line/path overhead byte processing: B1/B2/B3 bit error parity counting, J1 path trace identifier, C2 payload signal label, FEAC far-end alarm control maintenance channel
• Independent per-port clock domain configuration: Internal free-running clock or network loop timing (configurable per interface)
• Full real-time SONET alarm detection, logging, and SNMP trap reporting: LOS, LOF, LAIS, PAIS, LRDI, PRDI, LOP, BER TCA threshold crossing alarms
• Built-in diagnostic loopback modes for field troubleshooting: Local SPA loopback, line-side SONET network loopback, ATM cell loopback
• Supported Cisco OC-12 SFP optical transceiver options with LC duplex fiber connectors:
  • SFP-OC12-MM: Multimode fiber, short reach
  • SFP-OC12-SR: Single-mode short reach
  • SFP-OC12-IR1: Intermediate reach, up to 15km
  • SFP-OC12-LR1 / LR2: Long reach, up to 40km+

ATM Layer Transport & Encapsulation Feature Set

1. Full ATM Service Class QoS support for multi-service convergence: 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 guaranteed cell rate (MCR)
2. Per-VC (Virtual Circuit) and per-VP (Virtual Path) independent granular traffic shaping, policing, CIR/EIR bandwidth metering, and Layer 2/3 CoS marking for differentiated service delivery
3. AAL5 ATM segmentation and reassembly for IP, Frame Relay, and Ethernet payloads; supports RFC 1483 / RFC 2684 LLC/SNAP and VC-mux multi-protocol encapsulation over ATM
4. Frame Relay to ATM Service Interworking (FR-ATM IWF) for seamless migration of legacy leased-line customer services onto modern ATM/MPLS core networks
5. Full MPLS over ATM (MPoATM) support, including Layer 3 VPNs, 6PE/6vPE IPv6 transport, MPLS Traffic Engineering (TE), and MPLS FRR Fast Reroute for high-availability service delivery
6. Massive virtual connection scaling: Supports thousands of simultaneous PVC (Permanent Virtual Circuits), SVC (Switched Virtual Circuits), and Soft VC connections on the single OC-12 interface
7. Additional Layer 2 features: IEEE 802.1Q VLAN tagging, QinQ stacked VLAN encapsulation for carrier metro Ethernet over ATM transport

Full Line-Rate Hardware Offloading Architecture

• SONET section/line/path overhead processing, bit error parity calculation, payload scrambling/descrambling
• AAL5 variable-length IP packet segmentation into ATM cells and reverse reassembly of incoming ATM cell streams into complete IP packets
• Per-VC hierarchical QoS queuing, weighted fair queuing (WFQ), traffic shaping, and bandwidth policing
• MPLS label stack insertion and stripping, full IPv4/IPv6 routing lookup, hardware-accelerated ACL packet filtering
• MAC address accounting, ingress/egress traffic metering, and real-time bandwidth utilization statistics collection

Zero-Disruption Online Insertion and Removal (OIR) Hot-Swap Maintenance

Unified IOS / IOS-XE / IOS-XR CLI & SNMP Network Management

Front Panel LED Status Indicators

1. Global SPA STATUS LED
   • Off: No power supplied to the SPA module or hardware power fault detected
   • Solid Amber: SPA undergoing boot initialization, firmware download, or minor hardware fault state
   • Solid Green: SPA fully initialized, functional, and ready for traffic forwarding
   • Blinking Green: SPA hardware initialization sequence active post OIR insertion or chassis power-up
2. Per-Port C/A (Carrier/Alarm) LED (single port indicator)
   • Off: No SFP optical transceiver installed, port administratively shut down, or optical LOS signal loss detected
   • Solid Amber: Stable optical link present but one or more active SONET/ATM critical alarms detected
   • Solid Green: Stable error-free OC-12 optical carrier established, no active port alarms
3. Per-Port A/L (Active/Loopback) LED (single port indicator)
   • Off: No bidirectional ATM cell/IP packet traffic transmitting or receiving on the port; no diagnostic loopback mode enabled
   • Solid Green: Normal active port operation with standard data forwarding
   • Solid Amber: Diagnostic loopback mode activated for port troubleshooting
   • Blinking Green: Bidirectional ATM cell and IP packet traffic actively passing through the port; blink frequency proportional to real-time traffic load

3. Hardware Electrical, Thermal & Physical Specifications

Power Consumption

• Typical idle power draw (no SFP transceiver installed, zero data traffic): ~22 Watts
• Medium-load power draw (OC-12 SFP transceiver installed, moderate mixed voice/data traffic load): ~25 Watts
• Maximum full-load peak power dissipation (single OC-12 port running continuous full line-rate bidirectional traffic): ≤28 Watts
• Power input: 3.3V DC power supplied exclusively via the SIP backplane connector interface; no external auxiliary power ports required for operation

Environmental Operating Parameters

• Continuous standard operating temperature range for datacenter / central office deployments: 5°C ~ 40°C (41°F ~ 104°F)
• Short-term extended operating temperature range for temporary non-standard environment operation: -5°C ~ 70°C (23°F ~ 158°F)
• Non-operating storage temperature range for spare inventory and transit shipping: -40°C ~ 70°C (-40°F ~ 150°F)
• Operating relative humidity: 5% ~ 85% RH, non-condensing atmospheric conditions
• Storage relative humidity: 5% ~ 95% RH, non-condensing
• Standard certified operating altitude: -60m ~ 2,000m above sea level; extended validated altitude up to 4,000m
• Cooling architecture: Passive convection thermal cooling system with integrated stamped aluminum heatsink mounted on the SPA PCB; no onboard mechanical cooling fans. Chassis forced airflow provides supplementary thermal dissipation under maximum full-traffic load conditions
• NEBS compliance: Fully meets GR-63-Core and GR-1089-Core NEBS environmental and electrical surge immunity standards for permanent carrier central office deployment

Physical Form Factor & Weight

• Form factor: Single-height Shared Port Adapter (SPA), occupies one single-height SIP subslot
• External physical dimensions (Width × Depth × Height): 171.5mm × 184.9mm × 20.3mm (6.8" × 7.3" × 0.8")
• Net module weight (excluding SFP optical transceivers, fiber cables, and retail packaging): Approximately 0.34 kg (11.99 oz)

4. Regulatory & Global Compliance Certifications

1. Electrical Safety Standards: UL 60950-1, CSA C22.2 No.60950-1, IEC 60950 CB Scheme, EN 60950-1, AS/NZS 3260, TS001, GB 4943 China national IT equipment safety standard
2. EMC / EMI Electromagnetic Compatibility: FCC CFR Title 47 Part 15 Class A, ICES-003 Class A, VCCI Class A ITE, EN55022 Class A, CISPR 22 Class A, CISPR 24, full EN 61000 series ESD, electrical surge, radiated and conducted immunity compliance
3. Optical Laser Safety: IEC 60825-1 Class 1 laser certification for all OC-12 SFP optical port transceivers, safe for human visual exposure under normal operating conditions
4. Telecommunications Industry Standards: ANSI T1.105 SONET OC-12, ITU-T G.703 / G.707 SDH STM-4, ATM Forum UNI 3.1/4.0, RFC 1483, RFC 2684, RFC 2558 SONET MIB
5. Environmental Directives: Full EU RoHS Restriction of Hazardous Substances compliance, EU WEEE Waste Electrical and Electronic Equipment recycling directive compliant

5. Core Deployment Advantages

1. Modular I-Flex Cross-Platform Architecture Maximizes Chassis Slot Utilization

   The single-height single-port OC-12 ATM SPA delivers high-speed 622Mbps ATM connectivity within a single compact SIP subslot, optimizing valuable router chassis slot capacity for service provider edge POP and enterprise core aggregation deployments. The interchangeable cross-platform I-Flex SPA design enables unified spare parts inventory management across Catalyst 6500, 7600, CRS, XR 12000, and ASR 1000 Series platforms, drastically reducing long-term operational spare stock capital costs for multi-site distributed carrier and enterprise networks.
2. Full Hardware ATM SAR Offloading Eliminates Route Processor CPU Overload

   All compute-heavy ATM SAR cell segmentation/reassembly, SONET overhead parsing, granular per-VC QoS traffic shaping, and MPLS label switching forwarding operations are fully offloaded to dedicated onboard SPA silicon hardware. This preserves critical host route processor CPU resources exclusively for core control-plane network functions including BGP, OSPF, IS-IS routing adjacency maintenance, device system management, and logging services. Hardware offloading prevents routing protocol flapping, excessive packet forwarding latency, and customer-facing ATM service outages during peak full-line-rate production traffic conditions.
3. Non-Disruptive OIR Hot-Swap Maintenance Minimizes Mission-Critical Network Downtime

   Built-in full OIR hot-swap capability allows field network technicians to remove, replace, or upgrade faulty SPA modules without shutting down the entire router/switch chassis or interrupting live production traffic on other active SPA ports hosted on the same SIP carrier card. This capability eliminates lengthy scheduled maintenance windows for mission-critical ATM voice trunk, enterprise multi-service data, and carrier customer aggregation networks, substantially improving overall end-to-end network service availability metrics and reducing NOC field maintenance labor overhead expenses.
4. Comprehensive Carrier-Grade Converged Voice, Video & Data Multi-Service Feature Suite

   The SPA integrates a complete enterprise and service provider-grade ATM feature set fully implemented via dedicated hardware acceleration, supporting end-to-end convergence of VoIP voice, real-time video conferencing, and high-volume IP data services over existing legacy ATM transport infrastructure. Native support for all five standard ATM QoS service classes, per-VC granular bandwidth policing and congestion management, Frame Relay ATM interworking for legacy leased-line migration, and full MPLS VPN transport technology enables network operators to seamlessly migrate traditional TDM/Frame Relay customer services onto modern IP/MPLS core backbone networks while fully retaining existing deployed ATM access trunk infrastructure, delivering significant long-term capital expenditure and operational cost savings.
5. Fanless Passive Thermal Design Delivers Superior Long-Term Hardware Reliability

   The SPA utilizes a fully passive fanless aluminum heatsink thermal dissipation architecture with zero moving mechanical fan components. This design eliminates all the most common hardware failure vectors associated with active cooling systems, including fan motor mechanical wear-out, dust and debris accumulation blocking airflow, fan power supply faults, and fan noise interference in quiet datacenter environments. The passive cooling design enables stable, reliable 24/7 unattended continuous operation in remote unmanned central office equipment closets, regional service provider POP aggregation router sites, and enterprise core datacenter deployments with minimal long-term on-site hardware maintenance requirements. Low idle and peak operational power consumption reduces overall router chassis total power draw and associated datacenter cooling energy expenditure over the multi-year hardware service lifecycle, lowering total cost of ownership (TCO) for large-scale distributed multi-site carrier and enterprise ATM network deployments.

Supplementary Product Notes

UNSPSC Classification Code

K9 Secure Software Compliance

Standard Hardware Warranty Terms