Acer Technologies Corp. Model 2400 External Modem RS-232C Phone Line DB25

Acer Technologies Corp. Model 2400 External Modem RS-232C Phone Line DB25

The Acer Technologies Corp. Model 2400 is a desktop external dial-up modem from the early PC era, designed to connect a computer's RS-232C serial port to the public switched telephone network (PSTN). It communicates at 2400 baud and connects to the host computer via a standard DB25 serial cable, while the rear-panel RJ-11 jacks provide separate PHONE and LINE connections for the telephone line and a pass-through handset.

Specifications & What's Included

• Manufacturer: Acer Technologies Corp.
• Model: 2400
• Type: External dial-up modem
• Data rate: 2400 baud
• Host interface: RS-232C via DB25 (25-pin) serial connector
• Telephone connectors: RJ-11 PHONE (handset pass-through) and RJ-11 LINE (wall jack)
• Power connector: DIN-style; on/off switch on rear panel (SW)
• Power requirements: +5V @ 0.8A, +12V @ 0.1A, -12V @ 0.1A
• Front-panel LED indicators: HS, AA, CD, OH, RD, SD, TR, MR
• Form factor: Desktop external unit
• FCC compliance: Part 15, Class B computing device
• Included: Modem unit only — no power adapter, serial cable, or documentation

Applications

The Acer Model 2400 is a product of the early-to-mid 1980s era of personal computing, when 2400 baud external modems were standard equipment for dial-up connectivity on IBM PC, XT, and AT-class systems as well as compatible machines. Modems of this type connected computers to bulletin board systems (BBS), early online services such as CompuServe and The Source, and dial-up data networks using the Hayes AT command set. The RS-232C DB25 interface was the universal PC serial standard of the period, and the separate PHONE jack allowed the telephone handset to share the same line. Today these units are collected as vintage computing hardware and are occasionally still used in legacy industrial or telecom environments that retain dial-up serial communication requirements.