PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN/GTM-4Test Set,telephone

Joint Electronics Type Designation System · NSN 6625-00-989-9894 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-989-9894 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-989-9894. Primary manufacturer part number: AN/GTM-4.
Features
  • Test Set,telephone — FSC 6625
  • Test Type for Which Designed: PROGRESSIVE LOGIC
  • DC Voltage Rating: -22.0 VOLTS NOMINAL FIFTH ALTERNATE OPERATING POWER RQMT
  • Enclosure Feature: SINGLE ITEM W/CARRYING CASE
  • Accessory Controlling Agency: JETDS
  • DC Voltage Rating: 6.0 VOLTS NOMINAL FIRST ALTERNATE OPERATING POWER RQMT
  • Length: 15.000 INCHES NOMINAL IN
  • FSC Application Data: TEST SET,TELEPHONE
Applications
  • Applications requiring Aluminum Carrying Case construction
General Description

The Test Set,telephone, cataloged under National Stock Number 6625-00-989-9894, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Joint Electronics Type Designation System. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6625-00-989-9894
Primary Part NumberAN/GTM-4
Item NameTest Set,telephone
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusACTIVE
Test Type for Which DesignedPROGRESSIVE LOGIC
DC Voltage Rating-22.0 VOLTS NOMINAL FIFTH ALTERNATE OPERATING POWER RQMT
Enclosure FeatureSINGLE ITEM W/CARRYING CASE
Accessory Controlling AgencyJETDS
DC Voltage Rating6.0 VOLTS NOMINAL FIRST ALTERNATE OPERATING POWER RQMT
Length15.000 INCHES NOMINAL IN
FSC Application DataTEST SET,TELEPHONE
Height30.000 INCHES NOMINAL IN
Width22.000 INCHES NOMINAL IN
DC Voltage Rating-6.0 VOLTS NOMINAL SECOND ALTERNATE OPERATING POWER RQMT
DC Voltage Rating12.0 VOLTS NOMINAL THIRD ALTERNATE OPERATING POWER RQMT
Major ComponentsTEST SET,TELEPHONE; CASE,TEST SET,TELEPHONE
DC Voltage Rating-12.0 VOLTS NOMINAL FOURTH ALTERNATE OPERATING POWER RQMT
MaterialALUMINUM CARRYING CASE
Accessory Identifying NumberTS-1886/GTM-4 TYPE NO. AND CY-3817/GTM-4 TYPE NO.
Accessory Component Quantity2
Test Type for Which DesignedPROGRESSIVE LOGIC
DC Voltage Rating-22.0 VOLTS NOMINAL FIFTH ALTERNATE OPERATING POWER RQMT
Enclosure FeatureSINGLE ITEM W/CARRYING CASE
Accessory Controlling AgencyJETDS
DC Voltage Rating6.0 VOLTS NOMINAL FIRST ALTERNATE OPERATING POWER RQMT
Length15.000 INCHES NOMINAL IN
FSC Application DataTEST SET,TELEPHONE
Height30.000 INCHES NOMINAL IN
Width22.000 INCHES NOMINAL IN
DC Voltage Rating-6.0 VOLTS NOMINAL SECOND ALTERNATE OPERATING POWER RQMT
DC Voltage Rating12.0 VOLTS NOMINAL THIRD ALTERNATE OPERATING POWER RQMT
Major ComponentsTEST SET,TELEPHONE; CASE,TEST SET,TELEPHONE
DC Voltage Rating-12.0 VOLTS NOMINAL FOURTH ALTERNATE OPERATING POWER RQMT
MaterialALUMINUM CARRYING CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2520-00-532-7243A226284 INTERCHANGEABLE
Parts Kit,universal Joint
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
AN/GTM-4 Joint Electronics Type Designation System (USA)
608177 Itt Telecom Products Corp Network Systems Div (USA)
Related Parts
2520-00-532-7243INTERCHANGEABLE
PARTS KIT,UNIVERSAL JOINT
A226284

Frequently Asked Questions

What is NSN 6625-00-989-9894?

NSN 6625-00-989-9894 is a Test Set,telephone, manufactured by Joint Electronics Type Designation System, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-989-9894?

NSN 6625-00-989-9894 has 2 cross-referenced part numbers: AN/GTM-4 (Joint Electronics Type Designation System), 608177 (Itt Telecom Products Corp Network Systems Div).

What NSN replaces 6625-00-989-9894?

There is 1 known substitute for 6625-00-989-9894: 2520-00-532-7243. Verify interchangeability with system specifications before substitution.

What are the specifications of AN/GTM-4?

Key specifications for AN/GTM-4: Test Type for Which Designed: PROGRESSIVE LOGIC; DC Voltage Rating: -22.0 VOLTS NOMINAL FIFTH ALTERNATE OPERATING POWER RQMT; Enclosure Feature: SINGLE ITEM W/CARRYING CASE; Accessory Controlling Agency: JETDS. 30 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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