Diamond SupraExpress 336e SP ASVD 33.6K External Fax Modem SUP1940 V.34.
Item Description
Up for sale is a Diamond Multimedia SupraExpress 336e SP ASVD external fax/data modem, model SUP1940.
This is a classic late-1990s external hardware modem from Diamond’s well-known Supra line, designed for dial-up internet, fax transmission, and voice/speakerphone functionality. This unit is being sold AS-IS, untested, final sale. Please review all photos carefully for condition details.
Included in This Sale
✔ Diamond SupraExpress 336e SP ASVD modem
✔ External power adapter (as pictured)
✔ Attached cable
✔ Telephone cable (as pictured)
Nothing else is included. No manuals, driver disks, or original packaging.
Key Specifications (From Original Product Information)
33,600 bps data (ITU-T V.34 standard)
14,400 bps fax
V.42 / V.42bis error correction & compression
MNP 2–5 support
ASVD (Advanced Speakerphone with Voice/Data)
External serial (RS-232) interface
LED indicators: OH, SD, RD, ON
Dual RJ-11 ports (Line & Phone pass-through)
3.5mm Mic and Speaker audio jacks
FCC Part 68 compliant
Ringer Equivalence: 0.4A
About the SupraExpress 336e SP ASVD
The SupraExpress series was one of the most respected modem lines of the late 1990s. Known for stable V.34 connections and solid fax reliability, these units were commonly used with:
Windows 95 / 98 / NT systems
DOS systems
Macintosh systems
BBS access
Early ISP dial-up internet
Fax software applications
The ASVD version includes voice/speakerphone capability, making it more desirable than standard data-only versions.
Today these are popular with:
Condition
Vintage pre-owned condition
Untested
Cosmetic wear and dust consistent with age
No functional testing has been performed
Because of age and lack of testing capability, this item is being sold as is final.
Please purchase only if you are comfortable buying vintage electronics.
Important Notes
This is a true hardware serial modem — not a modern USB modem.
Requires a serial port (DB9) and appropriate software/drivers for use.
