The UN375F is a SCSI disk-drive circuit pack used in the Lucent Technologies / Alcatel-Lucent 5ESS telephone switching system. Telecom equipment suppliers identify the UN375F as a 3B21D Disk Drive, with CLEI/HECI identifiers in the SP3QADR family.
The UN375F belongs to the UN375 series of storage circuit packs used in the 3B21D computer architecture of the 5ESS switch. The 3B21D Hardware Reference Manual describes the UN375F series as incorporating a board-mounted 3.5-inch Low Voltage Differential (LVD) multimode/single-ended SCSI hard disk drive.
The documented UN375F configuration uses a 9 GB hard disk drive. A 5ESS corrective-maintenance document identifies UN375F / KS23908L50 as a 9 GB configuration and also lists an ATLAS IV 9 WLS 9 GB configuration.
Key Features
- Manufacturer: Lucent Technologies / Alcatel-Lucent
- Part Number: UN375F
- System: 5ESS
- Computer Platform: 3B21D
- Product Type: SCSI Disk Drive Circuit Pack
- Storage Capacity: 9 GB
- Drive Form Factor: 3.5-inch
- Interface: SCSI
- Interface Type: LVD / multimode single-ended SCSI
- Board-mounted disk-drive assembly
- Used for 5ESS system storage
- Carrier-grade central-office equipment
- Legacy telecommunications switching hardware
- Related CLEI/HECI: SP3QADR family
Technical Specs
Manufacturer: Lucent Technologies / Alcatel-Lucent
Part Number: UN375F
Product Family: UN375 Series
System: Lucent 5ESS
Computer: 3B21D
Product Type: Disk Drive Circuit Pack
Function: System disk/storage
Storage Capacity: 9 GB
Drive Size: 3.5-inch
Interface: SCSI
SCSI Configuration: LVD multimode / single-ended
Drive Mounting: Board-mounted
Documented Drive Identification: KS23908L50
Alternate Documented Drive: ATLAS IV 9 WLS
CLEI/HECI Family: SP3QADR
Application: 5ESS telecommunications switching system
The 3B21D Hardware Reference Manual specifically states that the UN375F series provides a board-mounted 3.5-inch LVD multimode, single-ended SCSI hard disk drive.
