Description
Paradyne 2811-03 DSU/CSU Modem DTE DCE Alarm Error Code 154 For Parts
The Paradyne 2811-03 is a Data Service Unit/Channel Service Unit modem from 1985 used for digital telecommunications and data transmission. It supports DTE and DCE interfaces with alarm monitoring capabilities.
Specifications & What's Included
- Model: 2811-03 | Manufacture Date: 1985
- Type: DSU/CSU Modem | Form Factor: Desktop/Tabletop
- Interfaces: DTE (J1 DB-25), DCE (J2 DB-25), Alarm (J3 DB-9)
- Power: 0.5A at 100/120V or 0.25A at 220/240V
- Status Indicators: SEC, STB, BYP, ALM, BAT, PWR, RTS, CTS, TXD, LSD, RXD, DSR, DTR
- Front panel Medeco keyed lock (no keys included)
- UL Listed, E.D.P. Equipment certified
Applications
DSU/CSU modems were standard equipment in legacy telecommunications networks for converting digital signals between DTE devices and digital service lines. The 2811-03 was used in enterprise data communications, point-to-point connections, and carrier networks during the 1980s and 1990s. These units provided signal conditioning, timing, and alarm functions for synchronous data transmission over digital circuits.
Condition: For Parts or Not Working
This Paradyne 2811-03 DSU/CSU modem powers on but displays error code 154 and sounds an alarm — it is not functioning normally and is being sold strictly AS-IS for parts or repair. No keys are included to open the unit. Cosmetically the enclosure is in decent shape for its age, with the blue housing intact and the front-panel branding clean. The rear-panel DTE, DCE, and Alarm connectors appear undamaged in the photos. No functionality is guaranteed. Please view our photo set and contact us if you have any questions.
This Paradyne 2811-03 DSU/CSU modem powers on but displays error code 154 and sounds an alarm — it is not functioning normally and is being sold strictly AS-IS for parts or repair. No keys are included to open the unit. Cosmetically the enclosure is in decent shape for its age, with the blue housing intact and the front-panel branding clean. The rear-panel DTE, DCE, and Alarm connectors appear undamaged in the photos. No functionality is guaranteed. Please view our photo set and contact us if you have any questions.
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.
View AllClose
Additional Information
Brand: |
Paradyne |
Model: |
2811-03 |
MPN: |
2811-03 |
Type: |
DSU/CSU Modem |
SKU: |
22400 |
Condition: |
As-Is / For Parts or Not Working |
Seller Notes: |
Displays error code 154 on power-up. No keys included. Sold AS-IS. |
Country/Region of Manufacture: |
United States |
Form Factor: |
Desktop / Tabletop |
Power Requirements: |
0.5A 100/120V; 0.25A 220/240V |
Interface Type: |
DTE, DCE, Alarm |
Connector Type: |
DB-25 (DTE J1, DCE J2), DB-9 (Alarm J3) |
Number of Ports: |
3 (J1 DTE, J2 DCE, J3 Alarm) |
Status Indicators: |
SEC, STB, BYP, ALM, BAT, PWR, RTS, CTS, TXD, LSD, RXD, DSR, DTR |
Fault / Error Code: |
Error Code 154 displayed on power-up |
Security: |
Medeco keyed lock on front panel (no keys included) |
Standards: |
UL Listed, E.D.P. Equip |
Manufacture Date: |
1985 (per rating plate: AU8 85) |
Condition Notes: |
Paradyne 2811-03 DSU/CSU modem powers on but shows error code 154 and alarm. Sold AS-IS for parts or repair only. No keys included. No functionality guaranteed. Please view photos and contact us with questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
