Description
3Com AccessBuilder 6100 AB6101 3C62304-AC-NC Inverse Mux 7-Port DS1 NXT1
The 3Com AccessBuilder 6100 is a rackmount inverse multiplexer (IMUX) designed to aggregate multiple DS1/T1 circuits into a single high-bandwidth WAN connection. Using 3Com's NXT1 inverse multiplexing protocol, it bonds up to seven DS1 (1.544 Mbps) channels to deliver scalable, high-speed serial WAN connectivity. The unit carries assembly number 3C62304-AC-NC, model designation AB6101, and hardware revision AF, as confirmed on the rear label.
Specifications & What's Included
- Brand: 3Com
- Model: AccessBuilder 6100 (AB6101)
- Assembly Number: 3C62304-AC-NC
- Hardware Revision: Rev AF
- Type: Inverse Multiplexer (IMUX)
- DS1 Ports: 7 (NXT1 inverse multiplexing over T1)
- Interface: DS1 / T1 high-speed serial WAN
- Power: AC (IEC AC inlet, rear panel)
- Form Factor: Rackmount
- Front Panel: 7-segment LED alphanumeric display; ACO and SCROLL push-buttons
- Status Indicators: Power (green), Fan, Major alarm, Minor alarm LEDs, plus 7 individual port status LEDs (Ports 1–7)
- Cooling: Dual rear-mounted fans visible in photos
- Rear Panel: Multiple DB-style high-speed serial connectors, RJ-style connectors, and IEC AC power inlet
- Country of Manufacture: Canada (per rear label)
- Unit only — no cables or accessories included
Applications
Inverse multiplexers like the 3Com AccessBuilder 6100 were deployed in enterprise and service-provider networks during the mid-to-late 1990s to cost-effectively scale WAN bandwidth beyond a single T1. By bonding multiple DS1 circuits, the AccessBuilder 6100 could deliver aggregate throughput up to 7 x 1.544 Mbps — useful for connecting branch offices, data centers, or campus sites that needed more bandwidth than a single T1 but where fractional or full DS3 service was not yet practical or available. The NXT1 protocol was 3Com's proprietary inverse multiplexing standard for this platform. The AccessBuilder 6100 series was commonly used alongside routers and CSU/DSU equipment in corporate WAN infrastructure of that era. Today, these units are primarily sought by legacy network administrators maintaining older WAN installations, network historians, and technicians needing spares for existing AccessBuilder deployments.
This 3Com AccessBuilder 6100 (3C62304-AC-NC) inverse multiplexer has been inspected and is in good used condition. It was pulled from a working environment where it was in active use. The chassis is clean overall with light surface scuffs typical of rack-mounted equipment. The front-panel LED display and indicator lights are visible in our photos. The rear panel connectors appear intact with no obvious damage. 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: |
3Com |
Model: |
AccessBuilder 6100 |
MPN: |
3C62304-AC-NC |
Secondary Model: |
AB6101 |
Hardware Revision: |
Rev AF |
SKU: |
14680 |
Type: |
Inverse Multiplexer (IMUX) |
Number of DS1 Ports: |
7 |
Interface Type: |
DS1 / T1, High-Speed Serial |
Data Rate: |
Up to 7 x 1.544 Mbps DS1 (NXT1) |
Protocol: |
NXT1 Inverse Multiplexing over T1 |
Power Supply Type: |
AC |
Form Factor: |
Rackmount |
Front Panel Display: |
7-segment LED display; Power, Fan, Major/Minor alarm LEDs |
Ports Indicators: |
7 individual port status LEDs |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Unit only; pulled from a working environment |
Country/Region of Manufacture: |
Canada |
Condition Notes: |
3Com AccessBuilder 6100 (3C62304-AC-NC) inverse multiplexer. Inspected, in good used condition. Pulled from a working environment where it was in active use. Chassis shows light normal wear. Please view photos and contact us with questions. |