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USRobotics 661787-81-1 661787-81 56K Sportster Isa Fax/Modem 0460
- Internal ISA bus modem card.
- Data transmission speed up to 56 Kbps (downstream).
- Supports V.90 modem standard.
- Includes fax capabilities.
- Features error correction and data compression.
- 8-bit ISA interface for compatibility with older motherboards.
- Part number 661787-81, also referred to as 0460.
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Product Overview
The USRobotics 661787-81-1 56K Sportster ISA Fax/Modem is an internal modem card designed for older computer systems using the ISA bus. It provides 56K dial-up connectivity and fax capabilities.
Technical Information
| Modem Type | Internal ISA Card |
| Data Rate | 56 Kbps (Downstream) |
| Standards | V.90, V.42bis, MNP 5 |
Additional Specifications
| Interface | 8-bit ISA |
| Features | Fax, Error Correction, Data Compression |
Product Description
The USRobotics 661787-81-1, also known by its part number 661787-81 and sometimes referenced as 0460, is an internal modem card designed for installation in older personal computers that utilize the ISA (Industry Standard Architecture) bus. This particular model is a 56K fax/modem, meaning it can achieve high-speed dial-up internet connections and also send and receive faxes. Its primary target audience is users of legacy systems that lack newer expansion slots like PCI or PCIe. This modem card supports the V.90 standard, which allows for download speeds of up to 56 kilobits per second over analog phone lines. While the V.90 standard was the pinnacle of dial-up modem technology, actual speeds could vary based on line quality and the capabilities of the modem at the other end. The card includes essential features like error correction (e.g., V.42bis) and data compression to ensure reliable data transfer and maximize throughput. It also provides full fax functionality, typically supporting Group 3 standards. The 8-bit ISA interface indicates its compatibility with older motherboards, often found in systems from the late 1980s through the mid-1990s. Installation requires opening the computer case and inserting the card into an available 8-bit ISA slot, followed by connecting a standard telephone line to the modem's RJ-11 port. The USRobotics 661787-81-1 serves as a crucial component for enabling or restoring communication capabilities on vintage hardware.
