Cisco WS-G5490 Full Official Product Description
1. Part Number & Naming Definition
Commercial Full Name
Cisco 1000BASE-DWDM Gigabit GBIC Optical Transceiver Module
SKU:WS-G5490
Naming Breakdown
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WS: Cisco Catalyst Switch hardware prefix
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G: Gigabit Ethernet
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5490: Market identifier for DWDM GBIC transceiver
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DWDM: Dense Wavelength Division Multiplexing single-mode optical transmission
Core Product Positioning
The Cisco WS-G5490 is a hot‑swappable MSA‑compliant GBIC transceiver designed for Gigabit Ethernet DWDM transmission over single‑mode fiber. It enables high-density wavelength multiplexing on a single fiber pair to maximize fiber bandwidth for metropolitan backbone, long-distance inter-site links and core Catalyst switch interconnections. Deployed together with DWDM multiplexer hardware, it consolidates multiple Gigabit services over limited existing fiber resources. It operates seamlessly with legacy Catalyst modular switching platforms equipped with GBIC slots.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Catalyst 4000, 4500, 5000, 6000, 6500 Series modular switches with GBIC slots
Supported IOS Versions
All mainstream Cisco IOS releases supporting GBIC transceiver recognition
Supported Fiber Type
Single‑Mode Fiber (SMF, 9/125μm) only; incompatible with multi‑mode fiber
Unsupported Platforms
SFP‑only switches, Nexus data center switches, MDS SAN directors, ISR routers
Reminder: GBIC cannot be directly inserted into SFP slots without dedicated adapter hardware.
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable GBIC module compliant with GBIC MSA standard
Optical Interface
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Wavelength: ITU-T standard DWDM grid wavelengths (C-band)
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Connector: Duplex SC
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Data Rate: 1.25 Gbps wire‑speed Gigabit Ethernet
Maximum Transmission Reach
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Standard single‑mode fiber: Up to 80 km
Optical Power Budget
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Transmit Power: -2 dBm ~ +3 dBm
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Receiver Sensitivity: Minimum -20 dBm
Digital Diagnostics
No Digital Diagnostic Monitoring Interface (DDMI) support
Environmental Operating Parameters
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Operating Temperature: 0°C ~ 70°C (32°F ~ 158°F)
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Storage Temperature: -40°C ~ 85°C (-40°F ~ 185°F)
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Relative Humidity: 10% – 90%, non‑condensing
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Maximum operating altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
Wire‑speed Gigabit Ethernet transmission, auto‑negotiation, full‑duplex operation
Layer 2 Protocol Support
802.1Q VLAN trunking, 802.3x flow control, LACP, STP/RSTP/MSTP, EtherChannel aggregation
Interface Diagnostics
Link status detection, port error counters, local loopback testing
High Availability
OIR hot‑swap capability on supported Catalyst chassis; link redundancy via spanning tree or port channels
Operations & Management
IOS CLI, SSH, SNMP v2c/v3, Syslog logging, real‑time interface statistics monitoring
5. Typical Deployment Scenarios
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Metropolitan area backbone DWDM multiplexed Gigabit fiber connections
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Long-haul inter-building core switch links with constrained fiber resources
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Carrier-class enterprise backbone capacity expansion via wavelength multiplexing
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Remote site interconnection over leased single‑mode dark fiber infrastructure
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Spare replacement transceiver hardware for legacy GBIC‑based Catalyst switching environments
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A, VCCI Class A
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Laser Safety: Class 1 Laser Product per IEC 60825‑1
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Environmental: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco WS-G5490 1000BASE-DWDM GBIC Transceiver
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Hardware installation guide
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Safety and regulatory documentation
Note: Fiber patch cords and DWDM Mux/Demux hardware are sold separately.
End-of-Sale Status
The GBIC form factor including DWDM variants has reached Cisco End‑of‑Sale. Spare inventory is available through authorized spare distributors and secondary hardware markets. Recommended migration: DWDM SFP transceivers for modern SFP‑based switching platforms.
UNSPSC Classification Code
43222618 – Cisco WS-G5490 1000BASE-DWDM GBIC optical transceiver, hot‑swappable dense wavelength multiplexing Gigabit single‑mode fiber module for legacy Catalyst modular enterprise switches.
Hardware Warranty
Original factory hardware carries Cisco limited hardware warranty; refurbished equipment follows reseller commercial warranty terms.
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