
Alcatel 3EM21500AA: MSC-2 mass storage controller for Sun-based Alcatel platform servers.
The Alcatel 3EM21500AA is an MSC-2 mass storage controller assembly, supplied under Alcatel’s own 3EM part numbering for the Sun-based servers used within Alcatel network management and switching platforms. Mass storage controller cards of this type bridge a server’s internal bus to attached SCSI or Fibre Channel storage, handling I/O between the host system and its disk or tape devices.
The 3EM prefix is Alcatel’s platform-component numbering, applied to the server and storage subsystem parts Alcatel qualified into its telecom deployments of that era, with the MSC-2 designation pointing to a specific controller revision within the family. This unit is supplied as a genuine pull from a decommissioned system, suitable for maintaining or repairing existing deployments where the original controller has failed.
Controller cards of this type are frequently tied to a narrow range of chassis and backplane revisions, so buyers should confirm exact host-system compatibility before ordering. Tech-Star (UK-based, shipped worldwide) stocks legacy server and platform hardware; get in touch to check compatibility and availability.

| Platform | Alcatel-Lucent ISAM FD / 7330 ISAM FTTN access platform |
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| Manufacturer | ALCATEL |

| Platform | Alcatel 1696 Metro Span SDH and DWDM metro transport |
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| Manufacturer | ALCATEL |

| Platform | Alcatel-Lucent optical transmission and switching platforms (XFP/SFP MSA pluggable) |
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| Manufacturer | ALCATEL |

| Platform | Alcatel OmniSwitch/OmniStack networking and OmniPCX telephony |
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| Manufacturer | ALCATEL |

| Platform | Alcatel OmniPCX Enterprise |
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| Manufacturer | ALCATEL |

| Platform | Alcatel OmniSwitch/OmniStack networking and OmniPCX telephony |
|---|---|
| Manufacturer | ALCATEL |
| Key Features | MSC-2 mass storage controller assembly; Sun server/storage subsystem component; Genuine pull from decommissioned system |
|---|---|
| Applications | Sun server storage I/O management; SCSI/Fibre Channel storage connectivity; Legacy Sun system maintenance |
| Compatibility | Sun Microsystems server and storage platforms; MSC-2 controller family |
| Specifications | Part number: 3EM21500AA; Function: Mass storage controller; Manufacturer: Sun Microsystems |
| Platform | Alcatel MSC-2 |
| Manufacturer | ALCATEL |
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