Description
ADC Kentrox D-SERV 56 DSU/CSU 78285 EIA-232 V.35 56Kbps No Power Supply
A Data Service Unit/Channel Service Unit for converting between DTE devices and leased-line WAN connections. The D-SERV 56 handles synchronous data transmission over dedicated circuits at up to 56 Kbps.
Specifications & What's Included
- Model: D-SERV 56 (MPN: 78285)
- Data Rate: Up to 56 Kbps
- Interfaces: EIA-232 (DB-25), V.35, RJ-11 LINE port
- DTE Rates Supported: 64, 56, 38.4, 19.2, 9.6, 4.8, 2.4 Kbps
- Configuration: DIP switch selectable (SW1–SW10)
- Clock Source: Internal or External via DIP switch
- Loopback Modes: Local, Remote, Test Pattern
- Power Requirements: AC 12VCT, 500mA MAX (external supply required)
- Unit only; no power supply included
Applications
DSU/CSU units connected DTE equipment such as routers, multiplexers, and terminal servers to carrier-provided leased lines and frame relay services. Commonly used in enterprise networks, branch office connectivity, and legacy WAN deployments through the 1990s and 2000s. Compatible with devices supporting EIA-232 or V.35 synchronous interfaces.
Condition: For Parts or Not Working
This ADC Kentrox D-SERV 56 DSU/CSU (PN 78285) has been inspected and appears to be in good used condition. The enclosure is clean with only minor surface wear consistent with normal use. The rear EIA-232 DB-25 connector, LINE port, and power inlet all appear intact. Note: no power supply is included — the unit requires an external AC 12VCT, 500mA supply which is not provided. Please view our photo set and contact us if you have any questions.
This ADC Kentrox D-SERV 56 DSU/CSU (PN 78285) has been inspected and appears to be in good used condition. The enclosure is clean with only minor surface wear consistent with normal use. The rear EIA-232 DB-25 connector, LINE port, and power inlet all appear intact. Note: no power supply is included — the unit requires an external AC 12VCT, 500mA supply which is not provided. 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.
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Additional Information
Brand: |
ADC Kentrox |
Model: |
D-SERV 56 |
MPN: |
78285 |
Type: |
DSU/CSU (Data Service Unit / Channel Service Unit) |
SKU: |
20823 |
Condition: |
Used – Inspected |
Seller Notes: |
No power supply included. Unit only. |
Interface Type: |
EIA-232, V.35 |
Data Rate: |
Up to 56 Kbps |
DTE Rates Supported: |
64, 56, 38.4, 19.2, 9.6, 4.8, 2.4 Kbps |
Connector Type: |
EIA-232 (DB-25), RJ-11 LINE port, IEC power inlet |
Power Requirements: |
AC 12VCT, 500mA MAX (external power supply required) |
TX Clock Source: |
Internal (INT) or External (EXT), configurable via DIP switch |
Loopback Modes: |
Local Loopback, Remote Loopback, Test Pattern |
Configuration Method: |
DIP switch (SW1–SW10 on bottom panel) |
Form Factor: |
Desktop / Standalone |
FCC Registration No.: |
F8USA-22265-DE-N |
Standards Compliance: |
FCC Part 15, FCC Part 68, RINGER EQUIV. 0.0B |
Country/Region of Manufacture: |
United States |
Condition Notes: |
ADC Kentrox D-SERV 56 DSU/CSU 78285 inspected, appears in good used condition. Clean enclosure, minor surface wear. No power supply included — requires external AC 12VCT 500mA supply. |
