Description
ADTRAN ISU 2X64 5200.0741D U-Interface Rackmount Card NDNTKC01AA 1995
The ADTRAN ISU 2X64 is a dual-channel 64 Kbps Integrated Service Unit card designed to slide into ADTRAN's rackmount chassis systems. It provides two independent 64 Kbps B-channels over a standard two-wire U-interface loop, allowing ISDN BRI or fractional bandwidth WAN connectivity in a compact, chassis-based form factor. The PCB is silkscreened with part number 5200.074-1D and bears the ADTRAN 1995 / Made in USA markings; the catalog part number is listed as 5200.0741D with secondary identifier NDNTKC01AA.
Specifications & What's Included
- Manufacturer: ADTRAN
- Model: ISU 2X64
- Part Number (MPN): 5200.0741D (PCB silkscreen: 5200.074-1D)
- Secondary Part Number: NDNTKC01AA
- Interface: U-Interface (2-wire)
- Channels: 2 x 64 Kbps (128 Kbps aggregated)
- Form Factor: Rackmount card/module — slides into ADTRAN rackmount cage
- Front faceplate: multi-LED status indicator array (TEST, SELECT, POWER, VOL, OOS, RTN, DTR1, DTR2, RD, SD, B1, B2 — visible in photos)
- PCB connector: J4 MODEM1 header visible on board
- Country of Manufacture: United States
- Manufacture date: 1995
- Included: card only — rackmount chassis not included
Applications
The ADTRAN ISU 2X64 is part of ADTRAN's ISU (Integrated Service Unit) card family, which was widely deployed in the 1990s for delivering ISDN BRI and fractional T1/56K WAN services at branch offices, small businesses, and enterprise remote sites. These cards plug into ADTRAN's rackmount shelf systems, allowing a single chassis to aggregate multiple WAN interface cards under centralized management — a common approach in carrier and enterprise edge installations of that era. The U-interface connection uses the standard two-wire local loop from the telephone company's network termination equipment, making these cards a direct fit for ISDN BRI circuits delivered over standard copper pairs. While ISDN BRI has largely been superseded by broadband technologies, these cards remain relevant for maintaining legacy ADTRAN-based WAN infrastructure and for facilities that still operate ISDN services or use the ADTRAN chassis platform for other purposes.
This ADTRAN ISU 2X64 U-Interface rackmount card (5200.0741D / NDNTKC01AA) has been inspected and is in good condition. The PCB appears clean with no visible damage, and the front faceplate with LED indicators is intact. Normal handling marks consistent with prior rack installation may be present. This is a card-only sale — no chassis is included; for a compatible ADTRAN rackmount cage see our related listing. 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.
Warranty Information
Additional Information
Brand: |
ADTRAN |
Model: |
ISU 2X64 |
MPN: |
5200.0741D |
Secondary Model: |
NDNTKC01AA |
SKU: |
29144 |
Type: |
U-Interface Rackmount ISU Card |
Form Factor: |
Card/Module — Rackmount Chassis |
Interface Type: |
U-Interface (2-wire BRI/ISDN) |
Data Rate: |
2x64 Kbps (128 Kbps aggregated) |
Number of Channels: |
2 (dual 64 Kbps B-channels) |
Compatible With: |
ADTRAN Rackmount Chassis (e.g. PID 29154) |
Country/Region of Manufacture: |
United States |
Manufacture Date: |
1995 |
Condition: |
Used – Inspected and in Good Condition |
Seller Notes: |
Card only; fits ADTRAN rackmount cage. See PID 29154 for cage. |
Condition Notes: |
ADTRAN ISU 2X64 5200.0741D rackmount card inspected and in good condition. PCB clean, faceplate intact. Card only — chassis not included. Please contact us with any questions. |
