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(Advanced Telecom Computing Architecture) A carrier grade backplane and interconnect specification developed by PICMG and defined under the PICMG 3.x standards. Designed for industrial strength telecom equipment and datacenter servers, AdvancedTCA cards are 14" high (8U) and may reside in single slot cabinets or cabinets up to 23" wide that hold 16 cards.

AdvancedTCA (ATCA) provides point-to-point, dual star and mesh topologies for Ethernet, Fibre Channel, InfiniBand, StarFabric, PCI Express and Serial RapidIO channels up to a total bandwidth of 2.5 Tbps. The first implementations of AdvancedTCA appeared in 2003.

Mezzanine Cards and Small Form Factor
The Advanced Mezzanine Card (AdvancedMC or AMC) is a daughterboard that is only 3" high and either attaches onto an AdvancedTCA card or plugs directly into a MicroTCA cabinet. AdvancedMC cards and MicroTCA backplanes provide a small form factor version of AdvancedTCA. See PICMG.

An AdvancedTCA "Shelf"
Designed to fit into a 19" wide rack, this shelf (cabinet) from Schroff has 12 ATCA node slots and two hub slots (middle). The hub slots provide a dual star configuration to the nodes. (Image courtesy of Schroff Electronic Solutions,

The Smaller Form Factor
This PICO-1US is a MicroTCA development and test system from CorEdge Networks. It includes a controller and slots for two single AMC cards or one double-wide card. (Image courtesy of CorEdge Networks, Inc.,
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ATCA is a maturing platform, with 75 percent of vendors already shipping.
The Impact of COTS to the Development and Supply Chain Communities," Venkataraman Prasannan, Senior Director, ATCA Product Line
RadiSys' ATCA-4500 has been optimized to meet Telecom Equipment Manufacturer (TEM) requirements for easily integrating into an existing ATCA chassis and for supporting multiple storage options and OS virtualization.
The ZNYX Ultra5 series of mid-size platforms provide application integrators with superior value-add opportunity through the highest integration and core density in an ATCA 5U chassis.
With open standards like ATCA, we minimize costs and deliver high-quality multimedia session management products by leveraging a strong supplier ecosystem and the economies of scale that come with a common architecture and components across a broad range of network elements.
The highly integrated ZX2000 platform has six ATCA 3.
The promise of ATCA is that it enables TEMs to obtain compute platforms effortlessly, cost effectively and quickly through outsourcing, reserving their development efforts for applications.
ATCA, AMC & MicroTCA Market Update & Five-Year Forecast identifies and analyzes the full spectrum of vendors developing ATCA, AMC and MicroTCA components and systems.
Thermal interoperability of a blade in an ATCA shelf depends on the airflow characteristics of the shelf and airflow impedance of the blade.
This enables end-users to minimize the number of slots dedicated to storage in the ATCA chassis by connecting to external storage outside the chassis through the Caspian storage blade.
The NEP community is very supportive of ATCA and commercial off-the-shelf components (COTS).
In terms of application, the Global ATCA CPU Blades market can be segmented into five: Communications and Network Infrastructure, Military and Aerospace, Industrial Automation and Control, Healthcare, and Others.