Telephone Test Set TS-3647/G, Control Orderwire Unit (COU)

© Brooke Clarke 2017



From eBay seller  hooksy2012This is part of my interest in military audio equipment, see Related below.  This unit is for testing parts of the Digital Group Multiplexers (DGM, 500 pages, COU Chapt. 13, but earlier version) system by Raytheon.  The backbone of the system is the CX-11230 twin coaxial cable that coes in 100 foot and 1/4 mile spools [TM 11-5995-208-10].


Unfortunately this is NOT a test set for any military telephone, but rather for testing the pulses in Group Multiplexer.

This turns out to be more a test set for the pulse signals in one of these systems:

TSQ-111 (FAS),Communications Nodal Control Element (CNCE) "..contains a mixture of analog, digital, and circuit routing equipment. It operates as the central point of a node. As the central point, the CNCE configures, monitors, controls, and manages user communications. The CNCE provides communication links that pass teletype, data, and voice circuits to analog or digital transmission facilities. Secure devices are included to provide protection for circuits, trunks, and groups passing through the shelter for destinations inside and outside the node."

TCC-42 (FAS) Automatic Telephone Central Office ".. is a sheltered automatic telephone switch which provides automatic switch and subscriber service for the TRI-TAC family or 4-wire analog and digital telephones including DSVT (secure telephone), DNVT (non-secure telephone), and analog telephones. The switch has six modems with 18 channel capability and one modem with 72 channel capability. The maximum number of single channel telephone subscribers is 100. The switch provides access to all other switches in the tactical network as well as commercial and Autovon circuits.

TRC-170, TRC-173, TRC-174 Tropospheric Scatter Microwave Radio Terminal "These terminals provide secure digital trunking between major nodes of a TRI TAC communications network. The multichannel radio terminal interface with other TRI TAC and current inventory equipment. TRC-170 terminals are also used in stand alone applications; that is, as a transmission link not associated with a technical control. TRC-170 links might carry dedicated traffic to include analog and digital channels, point to point subscriber circuits, facsimile circuits and teletype circuits."

The specific line equipment this test set connects to are the:

TD-1218/G Low Speed Pulse Restorer [TM 11-5805-701-12, NSN: 5820-01-145-4938] Built-in test connector for COU 4" dia x 15" long
TD-1219/G High Speed Pulse Restorer [TM 11-5805-702-12, NSN: 5820-01-145-4939] Built-in test connector for COU 4" dia x 15" long
TD-1234 Remote Multiplexer Combiner [TM 11-5805-707-12, NSN: 5820-01-145-2458] 8.5" x 13" x 17.25"
TD-1233 Remote Loop Group Multiplexer [TM 5805-706-34, NSN: 5820-01-145-2462]  8.5" x 13" x 17.25"

The ID label says:

Test Set, Telephone
Serial No.
Raytheon Company
Contr No. DAAB07-88-C-J010

Orange border Servicable Tag-Material on shipping case:

FSN: 6625-01-145-2463
p/n:  TS-3647/G
Desc: Telephone Test Set
s/n: 59AA  Unit of Issue: Ea.
Qty:  01
Condition Code:  A
Inspection Activity: 103 ACS
Inspector: Msgt Barry Jones
Date: 22 Jul 14

The NSN is 6625-01-145-2463
Included is a standard H-250 handset.


There are two cables stored under the door inside the lid.  Each as an MS3126F14-18S connector labeled "P1(J4)"  which connects to the ORDERWIRE jack on the front panel.

Dual Cable

Marked: COU-TD1218, 1219

This cable is made up using two cables and is terminated with a MS3126F16-8P Plug (8 male pins) marked: P2(J3).

Single Cable


This cable is made up using only one cable and is terminated with a MS3126f12-10S (10 female sockets) marked: P2(J9.10).


Fig 1 Yellow sticker:
RCN: 40818AAT
SCAC: FDF    Veh#  2
Nbr Pallets:               0000000
Nbr Lines:                 00000
Date:  18Aug2014
Time:   ??37.00
    Label 034 of 095

Telephone Test
                      Set TS-3647/G
Fig 2 Bar Code Label:
6625011452463RI Orderwire Control U
E397S200000011  U P A  $5,246.00     1 of 1
Telephone Test
                      Set TS-3647/G
Fig 3
Telephone Test
                      Set TS-3647/G
Fig 4
Telephone Test
                      Set TS-3647/G


Army: TM 11-5805-703-14
Navy: EE163-EA-OMI-010/E154 TS3647
Air Force: TO 31W2-2G-371
Marine Corps: TM 6625-14/1
Operator's, Organizational, DIrect Support and General Support Maintenance Manual, Test Set, Telephone, TS-3647/G, (NSN 6625-01-145-2463), 16 Sep. 1985

TM 11-5085-703-24P Organizational, Direct Support, and General Support Maintenance Repair Parts and Special Tools Lists (Including Depot Maintenance Repair Parts and Special Tools) for Test Set, Telephone TS-3647/G (NSN 6625-01-145-2463)


Crypto Machines
EE-8 Telephone Set
GRA-39 Radio Set Remote
KYV-2 Secure Voice Module for PRC-68 family radios
KY-38 Man Portable Secure Voice System
KY-57 Voice Transmission Security Device
KY-65 Voice Encryption Unit 
KY-68 Secure Field Phone
KY-99 Advanced Narrowband Digital Voice Terminal (ANDVT)
MSC-2001 Voice Encryption Unit (VEU)

AT&T TSD-3600 Telephone Security Device
Audio Connectors & Cloning - Fill - Retransmission
Telephone Patents
Telephone Tone and Probe
Telephone Tool Kit
EE8 Field Phone
FasTrak Vehicle ID Transponder
Key, Object & Pet Location Tags
Harris TS1000 ADSL Test Set
E-89-A Telephone Repeater
SB-22A  Switchboard
TA-1 Sound Powered Telephone Set
TA-312/PT Telephone Set  (Field Phone)
TA-341/TT Analog touch tone phone
TA-838/TT Telephone Set
TA-1042 Digital Non-Secure Voice Terminal (DNVT)
TG-5-B Telegraph Set
MK-356/G Wire Splicing Kit
Harris TSP-21 Telephone Test Set Plus
MATEL 2C800 Field Phone
Panasonic KX-TA824 Telephone System
Subscriber Loop Analyzers
Military Audio Accessories
Telephone Power & CATV Poles

Cell Phones
Spying on Cell (Mobil) Phones
Orion Electronics Ltd. Cellular Base Station ST616-CBS - fake cell tower



PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale
Page Created