Cisco SPA-2XT3/E3 Overview

SPA-2XT3/E3 is a Cisco Router Shared Port Adapter. This Cisco Clear Channel T3/E3 SPAs are designed to provide direct connectivity to T3/E3 lines for full-duplex communications at the T3 rate of 44.736 MHz or E3 rate of 34.368 MHz. They are available in 2- and 4-port options. The ports are configurable as either all T3 or all E3.

Quick Specs

Table 1 shows the quick specs.

Model	SPA-2XT3/E3
Product compatibility	● Cisco 7304 Router ● Cisco 7600 Series Routers ● Cisco 12000 Series Routers ● Cisco ASR 9000 Series Router ● Cisco XR 12000 Series Routers
Port density per SPA	2- and 4-port options
Physical interface	● 1.0/2.3 RF connector (75-ohm impedance) ● 1.0/2.3 RF to BNC adapter cable option
Physical specifications	● Weight: 0.75 lb (0.34 kg) ● Height: 0.8 in. (2.03 cm) (single height) ● Width: 6.75 in. (17.15 cm) ● Depth: 7.28 in. (18.49 cm)
Power	● 2-port: 7.7W maximum ● 4-port: 8.4W maximum

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SPA-2XT3/E3 Specifications
Product compatibility	• Cisco 7304 Router • Cisco 7600 Series Routers • Cisco 12000 Series Routers • Cisco ASR 9000 Series Router • Cisco XR 12000 Series Routers
Port density per SPA	2- and 4-port options
Physical Interface	• 1.0/2.3 RF connector (75-ohm impedance) • 1.0/2.3 RF to BNC adapter cable option
Protocols	Serial encapsulations: • HDLC • PPP, RFC 1662 • Frame Relay, RFC 1490
Features and functions	• Up to 4 independent T3 or E3 ports configurable as either all T3 or all E3 only • Full-duplex connectivity at T3 rate (44.736 MHz) or E3 rate (34.368 MHz) • Subrate and scrambling support of Quick Eagle Networks (formerly Digital Link), Larscom, ADC Kentrox, Adtran, and Verilink DSUs • Internal or network clock selectable per channel • Line and payload loopback capabilities: – Local and remote loopback at the T3 level – Response to embedded loopback commands – Insertion of loopback commands into transmitted signal Bit-error-rate-testing (BERT) pattern generation and detection per channel – Selectable pseudorandom pattern up to 32 bits long, including all 0’s, all 1’s, 215, 220, 220 QuasiRandom Signal Sequence (QRSS), 223, alternating 0’s and 1’s – 32-bit error-count and bit-count registers – Fully independent transmit and receive sections – Detection of test patterns with bit error rates up to 10-2 • 24-hour history maintained for error statistics and failure counts, at 15-minute intervals • 16- and 32-bit cyclic redundancy check (CRC); 16-bit default
T3-specific features	C-bit or M23 framing • Binary 3-zero substitution (B3ZS) line coding • T3 far-end alarm and control (FEAC) channel support • Compliant with T3 pulse mask per ANSI T1.102-1993 • Maintenance data link (MDL) • Line build-out up to 450 feet (135 meters) • Alarm monitoring – Alarm indication signal (AIS) – Loss of signal (LOS) – Out of frame (OOF) – Far-end receive failure (FERF) • Performance data collection – Line coding violation (LCV) – Framing bit errors (F- or M-bit errors) – P-bit error counts – C-bit error counts – Far-end block error (FEBE) counts
E3-specific features	G.751, or G.832 and unframed G.703 framing • High-density bipolar with three zeroes (HDB3) line coding • Compliant with E3 pulse mask • Software-configurable E3 national service bits • Alarm monitoring – Alarm indication signal (AIS) – Loss of signal (LOS) – Out of frame (OOF) – Far-end receive failure (FERF) • Performance data collection – Line coding violation (LCV) – Framing-pattern errors – FEBE counts
Reliability and availability	• OIR • Single SPA software reset
MIBs	RFC 2496 MIB (T3 MIB) and T1.231 MIB
Network management	Simple Network Management Protocol (SNMP)
Physical specifications	• Weight: 0.75 lb (0.34 kg) • Height: 0.8 in. (2.03 cm) (single height) • Width: 6.75 in. (17.15 cm) • Depth: 7.28 in. (18.49 cm)
Power	• 2-port: 7.7W maximum • 4-port: 8.4W maximum
Compliance and agency approvals	CE Marking Safety • UL 60950 • CSA 22.2 No.60950 • IEC 60950 • EN 60950 • AS/NZS 3260 • TS001 EMC • CFR47 Part 15 • ICES 003 • EN55022 • CISPR 22 • AS/NZ 3548 • VCCI • EN55024 • EN50082-1 • EN61000-6-1 Telecom (T3) • ANSI T1 107 • T1 404 • AT&T 54014 Telecom (E3) • G.703 • G.751 • G.832