Vintage Mitsubishi Diamond Digital M113 56k v.92 PCI Internal Data/Fax Modem
Manufacturer: Mitsubishi Electric Australia Pty Ltd
Model: Diamond Digital M113 / SmartLink SL2800
Part Number: 2456A16010
Serial Number: 0525003542
Origin: Made in China (Australian Telecommunications Certified)
Description
An exceptional piece of late 1990s to early 2000s personal computing history, this Mitsubishi Diamond Digital M113 internal PCI expansion card represents the pinnacle of consumer dial-up technology. Engineered for the Australian market, the card proudly bears the authentic regulatory N623 C-Tick compliance mark, guaranteeing its compatibility with historical local telecommunication networks.
The board is constructed on a vibrant blue PCB layout, featuring the highly regarded SmartLink SL2800 chipset alongside a pristine yellow Atech ATS-273C isolation transformer. Designed to support the legacy v.92 protocol, this hardware delivered the fastest possible speeds achievable over traditional copper telephone lines (56 Kbps), utilizing advanced features of its era such as rapid connect times and modem-on-hold functionality.
The physical interface features a standard low-corrosion steel mounting bracket housing dual RJ-11 ports configured for standard Line and Phone pass-through connectivity.
Condition Report
- Circuit Board: Excellent aesthetic condition. The blue solder mask retains its original factory luster with crisp white silkscreen component labeling.
- Solder Joint Integrity: The reverse side reveals clean, shiny factory solder points with no evidence of cold joints, bridge defects, or corrosion. Trace paths are completely intact.
- Component Health: All surface-mounted capacitors, resistors, and diodes present cleanly with no signs of bulging, leakage, or thermal stress.
- Authentication Labels: The original manufacturer identification sticker is fully intact, legible, and unblemished. Includes the green OK6 factory quality control inspection sticker.
- Bracket: Displays mild vintage patina and minor localized surface oxidation consistent with age, authenticating its period use without compromising structural integrity.
Required & Key Details
- Brand: Mitsubishi Electric Australia
- MPN (Manufacturer Part Number): 2456A16010
- Type: Dial-Up Modem
- Model: Diamond Digital M113
Hardware & Connectivity Specifications
- Compatible Port: PCI
- Form Factor: Internal Card
- Number of Ports: 2 Ports
- Ports: RJ-11 (Line / Phone Pass-through)
- Bus Interface: 32-bit PCI (Specification Revision 2.2)
- Chipset: SmartLink SL2800
Data & Performance Specs
- Maximum Data Transfer Rate: 56 Kbps
- Maximum Downstream Data Rate: 56 Kbps
- Maximum Fax Data Rate: 14.4 Kbps
- Modem Standard: V.92 / V.90
- Data Compression Protocols: V.44, V.42bis, MNP 5
- Error Correction Protocols: V.42, MNP 2-4
- Fax Mode Protocol: ITU-T V.17, V.29, V.27ter, V.21
Country & Regional Identifiers
- Country/Region of Manufacture: China
- Compliance Certification: N623 C-Tick (Certified for Australian PSTN networks)