Motorola 62099-51 ISA Modem Card 82002352 Voice Data RJ-11 Dial-Up Internal

Motorola 62099-51 ISA Modem Card 82002352 Voice Data RJ-11 Dial-Up Internal

The Motorola 62099-51 is an internal ISA bus modem card built around Motorola's own 62099-51 controller chip (secondary PN 82002352). It supports voice and data dial-up communication and installs into a standard 16-bit ISA expansion slot found in legacy desktop PCs. The card is manufactured in Taiwan and carries a date code of 9815, placing it at approximately week 15 of 1998.

Specifications & What's Included

• Manufacturer: Motorola
• Part Number / Model: 62099-51
• Secondary Chip PN: 82002352 (A8A1445, date code 9815)
• PCB Reference: DC BU03PT-380
• Bus Interface: ISA (16-bit)
• Form Factor: ISA expansion card with standard bracket
• Modem Type: Internal voice/data dial-up modem
• Phone Connectors: 2x RJ-11 (Line in + Phone passthrough) on bracket
• Audio Connectors: 2x 3.5mm jacks (speaker/microphone for voice modem use)
• Country of Manufacture: Taiwan
• What's Included: Card only — no driver software, cables, or documentation included

Applications

ISA internal modem cards like the Motorola 62099-51 were the standard method of adding dial-up connectivity to desktop PCs throughout the mid-to-late 1990s. The ISA bus was the dominant expansion interface in IBM-compatible PCs of that era before PCI took over as the primary slot standard. This card's voice modem capability allowed it to function as both a data modem for internet and BBS dial-up connections and as a speakerphone or voice messaging device using compatible telephony software. The dual RJ-11 ports let users keep a telephone connected through the card without unplugging it from the wall. Today these cards are sought by hobbyists and retrocomputing enthusiasts maintaining period-correct Windows 95, Windows 98, or DOS-era machines, as well as legacy industrial and embedded PC systems that still rely on ISA slots and dial-up communication for remote monitoring or control.