PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TT123AFGDistributor-Transmitter,teletype

Joint Electronics Type Designation System · NSN 5815-00-557-6256 · FSC 5815 · No Item Name Available
Verified by PartsTable
NSN 5815-00-557-6256 — this item is cataloged by the U.S. Government under National Stock Number 5815-00-557-6256. Primary manufacturer part number: TT123AFG.
Features
  • Distributor-Transmitter,teletype — FSC 5815
  • Phase: SINGLE FIRST ALTERNATE OPERATING POWER RQMT
  • Transmitting Speed: 60.0 AND 100.0 WORDS PER MIN
  • Tape Width: 0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
  • Frequency Rating: 50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM FIRST ALTERNATE OPERATING POWER RQMT
  • Joint Electronics Type Designation System Item Type Number: TYPFSNO. TT-123A/FG A
  • Motor Type: SERIES-GOVERNED
  • Unit Interval Quantity: 7.42 AND 1.00
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Distributor-Transmitter,teletype, cataloged under National Stock Number 5815-00-557-6256, is classified within Federal Supply Class 5815 (No Item Name Available) of the Communication, Detection, and Coherent Radiation Equipment group. The primary manufacturer of record is Joint Electronics Type Designation System. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5815-00-557-6256
Primary Part NumberTT123AFG
Item NameDistributor-Transmitter,teletype
FSC / FSG5815 / 58 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusACTIVE
PhaseSINGLE FIRST ALTERNATE OPERATING POWER RQMT
Transmitting Speed60.0 AND 100.0 WORDS PER MIN
Tape Width0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
Frequency Rating50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM FIRST ALTERNATE OPERATING POWER RQMT
Joint Electronics Type Designation System Item Type NumberTYPFSNO. TT-123A/FG A
Motor TypeSERIES-GOVERNED
Unit Interval Quantity7.42 AND 1.00
Nondefinitive Spec/std DataTT-123A/FG TYPE A
Recording Tape TypeCHAD
AC Voltage Rating115.0 VOLTS NOMINAL FIRST ALTERNATE OPERATING POWER RQMT
Joint Electronics Type Designation System Item NameJCENS,DISTRIBUTOR-TRANSMITTER,TELETYPEWRITER
DC Voltage Rating115.0 VOLTS NOMINAL SECOND ALTERNATE OPERATING POWER RQMT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5815-00-557-6257 INTERCHANGEABLE
Distributor-Transmitter,teletype
5930-01-416-7375 INTERCHANGEABLE
Switch,sensitive
5805-01-500-866990-204 INTERCHANGEABLE
Telephone Set
Ruta Supplies Inc
5340-01-506-409890204 INTERCHANGEABLE
Holder,key
Worth Co Inc
5935-01-510-0292EEG.1K.304.CYM INTERCHANGEABLE
Connector,receptacle,electrical
Lemo Usa Inc
5895-01-564-253590204 INTERCHANGEABLE
Case,electronic Communications E
Espey Mfg and Electronics Corp
Cross-Reference Index
Part NumberManufacturer
90204 Kleinschmidt Inc (USA)
TT123AFG Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
TT123AFG PRIMARY Joint Electronics Type Designation System (USA)
MILD14074 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
90204A Kleinschmidt Inc (USA)
Related Parts
5815-00-557-6257INTERCHANGEABLE
DISTRIBUTOR-TRANSMITTER,TELETYPE
5930-01-416-7375INTERCHANGEABLE
SWITCH,SENSITIVE
5805-01-500-8669INTERCHANGEABLE
TELEPHONE SET
90-204
5340-01-506-4098INTERCHANGEABLE
HOLDER,KEY
90204
5935-01-510-0292INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
EEG.1K.304.CYM
5895-01-564-2535INTERCHANGEABLE
CASE,ELECTRONIC COMMUNICATIONS E
90204

Frequently Asked Questions

What is NSN 5815-00-557-6256?

NSN 5815-00-557-6256 is a Distributor-Transmitter,teletype, manufactured by Joint Electronics Type Designation System, classified under FSC 5815 (No Item Name Available). Status: active.

What are the part numbers for NSN 5815-00-557-6256?

NSN 5815-00-557-6256 has 5 cross-referenced part numbers: 90204 (Kleinschmidt Inc), TT123AFG (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), TT123AFG (Joint Electronics Type Designation System), MILD14074 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 90204A (Kleinschmidt Inc).

What NSN replaces 5815-00-557-6256?

There are 6 known substitutes for 5815-00-557-6256: 5815-00-557-6257, 5930-01-416-7375, 5805-01-500-8669 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of TT123AFG?

Key specifications for TT123AFG: Phase: SINGLE FIRST ALTERNATE OPERATING POWER RQMT; Transmitting Speed: 60.0 AND 100.0 WORDS PER MIN; Tape Width: 0.688 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Frequency Rating: 50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM FIRST ALTERNATE OPERATING POWER RQMT. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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