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Racal

Racal-Milgo CMS DSU 556RD Communications Management Series Digital Service Unit

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SKU:
14842
MPN:
556RD
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
22.00 LBS
Shipping:
Calculated at Checkout
  • Racal-Milgo CMS DSU 556RD Digital Service Unit – front right three-quarter view showing LCD display panel and beige desktop enclosure
  • Racal-Milgo CMS DSU 556RD – rear panel view showing DB25 data connector, RJ network jack, CSA certification label, and Racal-Datacom manufacturer label
  • Racal-Milgo CMS DSU 556RD – close-up of front panel display showing arrow navigation keys, Exit and Accept soft keys, and 556 RD model designation
  • Racal-Milgo CMS DSU – close-up of front panel brand logo reading 'Racal-Milgo CMSDSU' in red and white lettering
  • Racal-Milgo CMS DSU 556RD – straight-on front panel view showing LCD display, navigation keys, Exit and Accept buttons, and 556 RD model label
  • Racal-Milgo CMS DSU 556RD – full rear panel view showing DB25 port, RJ jack, FCC compliance label, CSA mark, part/serial number label, and Racal-Datacom Sunrise FL manufacturer label
  • Racal-Milgo CMS DSU 556RD – right side view showing ventilation slots along the full length of the beige enclosure
$80.00
Was: $150.00
Current Stock: 2

Sold Out

Description

Racal-Milgo CMS DSU 556RD Communications Management Series Digital Service Unit

The CMS DSU 556RD is a digital service unit designed for T1/digital WAN interface management and telecommunications network connectivity. This desktop unit provides data port connections and front-panel monitoring capabilities for legacy telecom environments.

Specifications & What's Included

  • Model: 556RD | Manufacturer: Racal-Datacom, Inc. (Sunrise, FL)
  • Interface: T1 / Digital WAN with DB25 rear data port and RJ-style network jack
  • Display: Front-panel LCD with Exit/Accept soft keys
  • Standards: FCC Part 68, CSA (LR31070)
  • Form Factor: Desktop/Tabletop
  • Unit only; no power cord or accessories included

Applications

Digital service units like the 556RD were used in telecommunications and data communications infrastructure to manage T1 line connections and monitor digital WAN interfaces. These units functioned as protocol converters and line interface devices in enterprise networks, carrier facilities, and legacy telecom systems requiring T1 connectivity and management. The 556RD supported standard telecommunications protocols and was typically deployed in network operations centers and telecommunications closets.

Condition: Used
This Racal-Milgo CMS DSU 556RD Digital Service Unit has been visually inspected and appears to be in good used condition. The enclosure is clean with light shelf wear typical of equipment of this era. The front-panel LCD display and soft-key buttons appear intact. The rear DB25 data connector and RJ network jack show no visible damage. The unit was pulled from a surplus environment and has not been powered or tested at our facility. No power cord or accessories are confirmed included. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
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Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
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Additional Information

Brand:
Racal-Milgo
Model:
556RD
MPN:
556RD
Type:
Digital Service Unit (DSU)
SKU:
14842
Product Line:
CMS DSU Communications Management Series
Manufacturer:
Racal-Datacom, Inc. — Sunrise, FL, Made in U.S.A.
Country/Region of Manufacture:
United States
Form Factor:
Desktop / Tabletop
FCC Registration Number:
AP3MD-17X21-DD-N
Standards Compliance:
FCC Part 68; CSA (LR31070)
Interface Type:
T1 / Digital WAN
Connector Type:
DB25 (rear data port); RJ-style network jack
Display:
Front-panel LCD with Exit / Accept soft keys
Condition:
Used – Inspected
Seller Notes:
Unit only; no power cord or accessories confirmed included.
Condition Notes:
Racal-Milgo CMS DSU 556RD Digital Service Unit. Good used cosmetic condition; clean enclosure with light shelf wear. Pulled from surplus. Not powered or tested at our facility. No power cord confirmed. Please contact us with questions.
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Racal-Datacom DSU 6424 64 Kbps Serial DSU RS-232 V.35 DTE Desktop Unit

Racal

$35.00
Was: $70.00
Racal-Datacom DSU 6424 64 Kbps Serial DSU RS-232 V.35 DTE Desktop UnitThe Racal-Datacom DSU 6424 is a desktop serial data service unit (DSU) supporting 64 Kbps synchronous data transmission over...
14792
SKU:
14792
Availability:
Usually ships within 1–2 business days.
Weight:
8.00 LBS
Brand:
Racal-Datacom
Model:
DSU 6424
MPN:
DSU 6424
Type:
Serial DSU (Data Service Unit)
SKU:
14792
Data Rate:
64 Kbps
Interface Type:
RS-232, V.35
Form Factor:
Desktop
FCC Registration No.:
AP3USA-73376-DD-N
FCC Compliance:
Part 68, Part 15
Power Supply:
External — model 25C173-05
Certifications:
UL Listed (EDP Equip 310E), CSA
Connector Type:
RJ-11/RJ-45 (line ports), DB-25 (DTE), DIN power
Display:
LCD front panel display
Controls:
Front-panel keypad: EXIT, ENTER, 1, 2, 3, arrow
Condition:
Used – Inspected
Seller Notes:
Unit only; no external power supply included.
Country/Region of Manufacture:
United States
Condition Notes:
This Racal-Datacom DSU 6424 has been inspected and is in good used condition. Housing shows light wear. All ports and connectors appear intact. No external power supply included. Please contact us with any questions.