Allied Telesis AT-CM3K0S – Converteon Gigabit Media Converter Module SFP

Product Overview

The Allied Telesis AT-CM3K0S is a Converteon gigabit media converter module that installs into Allied Telesis Converteon chassis systems to deliver scalable, centrally managed copper-to-fiber media conversion. This Allied Telesis Converteon gigabit media converter module converts 10/100/1000Base-T twisted-pair copper to optical fiber via a flexible SFP slot, supporting both multimode and singlemode SFP transceivers for distances up to 80 km. Designed for enterprise IT administrators seeking a chassis-based gigabit copper to SFP fiber conversion solution, the CM3K0S reduces cabling complexity while enabling centralized management and hot-swap line card operation. It is compatible with all Converteon chassis models from single-slot to 18-slot high-density configurations.

Product Description

The AT-CM3K0S is a single-slot line card for the Allied Telesis Converteon chassis-based media conversion platform. On the copper side, it provides one 10/100/1000Base-T RJ-45 port with Auto-Negotiation and Auto MDI/MDIX support, operating at up to 1000 Mbps over distances up to 100 meters. The optical side features one SFP (mini-GBIC) slot that accepts industry-standard SFP transceivers, enabling network engineers to choose the appropriate fiber type — multimode or singlemode — and the appropriate reach, from short-range multimode to long-haul singlemode links up to 80 km. This SFP flexibility makes the CM3K0S highly adaptable to existing fiber plant infrastructure. The module supports IEEE 802.3ah OAM (Ethernet in the First Mile), enabling end-to-end link monitoring and fault detection for service provider and enterprise metro deployments. MissingLink and Smart MissingLink features propagate link-down events across media segments, ensuring that upstream switches and routers detect failures quickly. The module also supports 10K jumbo frames for compatibility with storage and virtualization traffic. A low-power eco-friendly mode reduces energy consumption when the link is idle. The AT-CM3K0S is hot-swap capable within supported Converteon chassis, allowing line card replacement without chassis downtime. Compatible chassis include the single-slot AT-CV1000, two-slot AT-CV1203, and the 18-slot AT-CV5000 high-density platform.

Key Features

• SFP-Based Fiber Port — Accepts any standard SFP transceiver; supports multimode or singlemode fiber, from short-range to 80 km singlemode links.
• 10/100/1000Base-T Copper Port (RJ-45) — Auto-negotiating with Auto MDI/MDIX; supports 10, 100, and 1000 Mbps over up to 100 m of Cat5e/Cat6.
• Converteon Chassis Compatible — Fits AT-CV1000 (1-slot), AT-CV1203 (2-slot), and AT-CV5000 (18-slot) chassis for scalable, managed deployments.
• IEEE 802.3ah OAM Support — Enables Ethernet in the First Mile link monitoring, remote fault indication, and loopback testing.
• MissingLink and Smart MissingLink — Propagates link failures across media boundaries for accurate fault detection by upstream devices.
• 10K Jumbo Frame Support — Handles large frames for NAS, SAN, and virtualization traffic without fragmentation.
• Auto MDI/MDI-X and Auto-Negotiation — Eliminates the need for crossover cables and simplifies copper-side installation.
• Low-Power Eco Mode — Reduces power draw during low-traffic periods, contributing to lower operational costs.
• Hot-Swap Capable — Line card can be inserted or removed from a Converteon chassis without interrupting other active modules.
• Single SFP Expansion Slot — Industry-standard mini-GBIC slot accepts third-party and Allied Telesis SFP transceivers.

Typical Applications

• Enterprise wiring closet deployments using centralized Converteon chassis for managed media conversion
• Service provider metro Ethernet networks requiring IEEE 802.3ah OAM fault monitoring
• Campus networks with mixed fiber plant (multimode and singlemode) needing flexible SFP-based conversion
• High-density media conversion in data center and IDF environments using the AT-CV5000 18-slot chassis
• Network expansions where hot-swap line card replacement is required to maintain uptime

Technical Specifications

Frequently Asked Questions

Q: Which Converteon chassis is the AT-CM3K0S compatible with?

The AT-CM3K0S is compatible with three Converteon chassis: the single-slot AT-CV1000, the two-slot AT-CV1203, and the 18-slot high-density AT-CV5000.

Q: What SFP transceivers can be used in the CM3K0S?

The SFP slot accepts standard mini-GBIC transceivers supporting multimode or singlemode fiber. Fiber type and distance depend on the SFP transceiver selected. Allied Telesis SFP modules are recommended for guaranteed compatibility.

Q: Is the AT-CM3K0S hot-swappable?

Yes. The module can be installed into or removed from a compatible Converteon chassis without powering down the chassis or interrupting other line cards.

Q: Does the CM3K0S support IEEE 802.3ah OAM?

Yes. IEEE 802.3ah OAM (Ethernet in the First Mile) is supported, enabling link monitoring, remote fault indication, and loopback testing for service-level network management.

Q: What is the maximum fiber reach?

Maximum fiber distance depends on the SFP transceiver installed. With appropriate singlemode SFP modules, the CM3K0S supports fiber links up to 80 km.

Q: Does the module support jumbo frames?

Yes. The AT-CM3K0S supports jumbo frames up to 10K bytes, ensuring compatibility with storage, virtualization, and high-throughput application traffic.

Q: Is this a managed or unmanaged module?

Management capability depends on the Converteon chassis used. When installed in a managed Converteon chassis, the module benefits from centralized configuration and monitoring via the chassis management interface.