Cisco SPA-1XCHOC48/DS3 Overview

SPA-1XCHOC48/DS3 is the Cisco ASR 9000 and XR 12000 Series Shared Port Adapter. This Cisco 1-Port Channelized OC-48/STM-16 SPA is available on high-end Cisco routing platforms offering the benefits of network scalability with lower initial costs and ease of upgrades. The Cisco SPA/SIP portfolio continues the Cisco focus on investment protection along with consistent feature support, broad interface availability, and the latest technology. The Cisco SPA/SIP portfolio allows different interfaces (Packet over SONET/SDH [POS], ATM, Ethernet, etc.) to be deployed on the same interface processor.

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SPA-1XCHOC48/DS3 Specifications
Type	SPA-1XCHOC48/DS3 Cisco ASR 9000 Series & XR 12000 Shared Port Adapter
Product compatibility	Cisco XR 12000 Series Routers Cisco ASR 9000 Series Router
Port density per SPA	1-port Channelized OC-48/STM-16
Physical interface (Channelized OC-48)	OC-48c/STM-16 Small Form-Factor Pluggable (SFP) optics module (refer to optical parameters in Table 2) Visual status indicators (LEDs): • SPA status LED • Per-port LEDs • Carrier and alarm • Active and loopback
Protocols	• IETF RFC 1490, Frame Relay Encapsulation • RFC 1662, Point-to-Point Protocol (PPP) in High-Level Data Link Control (HDLC)-like framing • Cisco HDLC • PPP, HDLC, and Frame Relay User Network Interface (UNI) encapsulations
Features and functions	DS3 • Full- and half-duplex connectivity at DS-3 rate (44.736 MHz) • Scrambling and subrate support of major data-service-unit (DSU) vendors • C-bit or M23 framing in DS-3 mode • G.751 or G.832 in E3 mode • Support for 16- and 32-bit cyclic redundancy check (CRC) (16-bit default) • 24-hour history maintained for error statistics and failure counts • DS-3 alarm and event detection (once-per-second polling) • Alarm indication signal (AIS) • Out of frame (OOF) • Far-end receive failure (FERF)
SONET errors, alarms, and performance monitoring	Synchronization • Local (internal) or loop timed (recovered from network) • Pointer activity monitoring Local (diagnostic) and line (network) loopback Payload mapping • POS with 1 + X^43 self-synchronous scrambler SONET/SDH compliance • Telcordia (Bellcore) GR-253-CORE (as applicable) • ANSI T1.105, T1.231 • ITU-T G.707, G.957, G.825 (as applicable) Supported SONET/SDH alarm and signal events • Signal failure bit error rate (SF-ber) • Signal degrade bit error rate (SD-ber) • Signal label payload construction (C2) • Path trace byte (J1) • Section • Loss of signal (LoS) • Loss of frame (LoF) • Error counts for B1 • Threshold crossing alarms (TCA) for B1 • Line • Line alarm indication signal (LAIS) • Line remote defect indication (LRDI) • Line remote error indication (LREI) • Error counts for B2 • TCA for B2 • Path • Path alarm indication signal (PAIS) • Path remote defect indication (PRDI) • Path remote error indication (PREI) • Error counts for B3 • TCA for B3 • Loss of pointer (LoP) • Positive stuffing event (PSE) Negative stuffing event (NSE) Path unequipped indication signal (PUNEQ) Path payload mismatch indication signal (PPLM)
Network management	• SONET-MIB (RFC 3592) • SONET/SDH-MIB (RFC 2558) • CISCO-SONET-MIB • DS-3/E3-MIB (RFC 3896) • Simple Network Management Protocol (SNMP)