Serial (RS-232) Computer Modems

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110 Results

    • LOT 2 US Robotics 3453C 56K External Serial Data Fax Modem - Image 1 of 4
    • LOT 2 US Robotics 3453C 56K External Serial Data Fax Modem - Image 2 of 4
    • LOT 2 US Robotics 3453C 56K External Serial Data Fax Modem - Image 3 of 4
    • LOT 2 US Robotics 3453C 56K External Serial Data Fax Modem - Image 4 of 4

    LOT 2 US Robotics 3453C 56K External Serial Data Fax Modem

    Pre-Owned ยท USRobotics
    (1)
    $29.99
    or Best Offer
    $12.85 shipping
    20 watching
    • NOS Vtg 3COM US Robotics 56K v90 Fax Modem for MAC OS model: 5689 New - Image 1 of 4
    • NOS Vtg 3COM US Robotics 56K v90 Fax Modem for MAC OS model: 5689 New - Image 2 of 4
    • NOS Vtg 3COM US Robotics 56K v90 Fax Modem for MAC OS model: 5689 New - Image 3 of 4
    • NOS Vtg 3COM US Robotics 56K v90 Fax Modem for MAC OS model: 5689 New - Image 4 of 4

    NOS Vtg 3COM US Robotics 56K v90 Fax Modem for MAC OS model: 5689 New

    Brand New ยท USRobotics
    $60.01
    $8.71 shipping
    • (Lot of 12) US Robotics V.92 Model# 5686 External Modem + Fax - Image 1 of 4
    • (Lot of 12) US Robotics V.92 Model# 5686 External Modem + Fax - Image 2 of 4
    • (Lot of 12) US Robotics V.92 Model# 5686 External Modem + Fax - Image 3 of 4
    • (Lot of 12) US Robotics V.92 Model# 5686 External Modem + Fax - Image 4 of 4

    (Lot of 12) US Robotics V.92 Model# 5686 External Modem + Fax

    Pre-Owned ยท USRobotics
    $95.00
    or Best Offer
    $8.47 shipping
    • ZyXEL Omni 56K Mini EE Dial-Up Modem Full Package - Image 1 of 4
    • ZyXEL Omni 56K Mini EE Dial-Up Modem Full Package - Image 2 of 4
    • ZyXEL Omni 56K Mini EE Dial-Up Modem Full Package - Image 3 of 4
    • ZyXEL Omni 56K Mini EE Dial-Up Modem Full Package - Image 4 of 4

    ZyXEL Omni 56K Mini EE Dial-Up Modem Full Package

    Pre-Owned ยท ZyXEL
    $14.99
    or Best Offer
    $33.00 shipping
  • US Robotics 0462 Sportster Voice 56K External Fax Modem with Voice Mail - Image 1 of 4

    US Robotics 0462 Sportster Voice 56K External Fax Modem with Voice Mail

    Pre-Owned ยท USRobotics
    $12.00
    $10.36 shipping
  • Zoom Model 3049 56K V.90 V.92 External Serial Modem - New/Sealed Box - Image 1 of 4

    Zoom Model 3049 56K V.90 V.92 External Serial Modem - New/Sealed Box

    Brand New ยท Zoom
    $79.00
    $8.69 shipping
  • US Robotics Courier 56K Business Modem 3453C New Sealed - Image 1 of 3

    US Robotics Courier 56K Business Modem 3453C New Sealed

    Brand New ยท USRobotics
    (1)
    $55.00
    $8.69 shipping
  • Vintage US Robotics Model 5686 3Com 56K Faxmodem External Modem V.90 x2 Tech - Image 1 of 4

    Vintage US Robotics Model 5686 3Com 56K Faxmodem External Modem V.90 x2 Tech

    Open Box ยท USRobotics
    (2)
    $40.00
    or Best Offer
    Free shipping
  • 5362US HAYES OPTIMA 56K External MODEM Version 7.0 Rare - Image 1 of 4

    5362US HAYES OPTIMA 56K External MODEM Version 7.0 Rare

    Pre-Owned ยท Hayes
    $39.99
    Free shipping
  • US Robotics Courier 56K Modem 3453 - Image 1 of 4

    US Robotics Courier 56K Modem 3453

    Pre-Owned ยท USRobotics
    (1)
    $19.95
    or Best Offer
    $16.95 shipping
  • Vintage US Robotics Courier V.Everything Modem - Image 1 of 4

    Vintage US Robotics Courier V.Everything Modem

    Pre-Owned ยท USRobotics
    $35.95
    or Best Offer
    $13.00 shipping
  • US Robotics 5686E Fax Modem 56K V.92 Modem Box + Inst NO Power Cord OBSOLETE - Image 1 of 4

    New ListingUS Robotics 5686E Fax Modem 56K V.92 Modem Box + Inst NO Power Cord OBSOLETE

    Parts Only ยท USRobotics
    (1)
    $18.35
    Was: $19.95was - US $19.95
    or Best Offer
    $9.95 shipping
  • USRobotics 3453C Courier 56k External Business Modem - Image 1 of 4

    USRobotics 3453C Courier 56k External Business Modem

    Open Box ยท USRobotics
    $68.73
    or Best Offer
    Free shipping
  • OPEN BOX: 3COM US Robotics 56K v90 Fax Modem for MAC model: 5689 - Image 1 of 4

    OPEN BOX: 3COM US Robotics 56K v90 Fax Modem for MAC model: 5689

    Open Box ยท USRobotics
    $32.95
    $13.35 shipping
  • Acorp M56SCD 56k v.92 External Dial-up Modem - Image 1 of 4

    Acorp M56SCD 56k v.92 External Dial-up Modem

    Pre-Owned
    $19.99
    $35.00 shipping
  • US Robotics 56K Serial Controller Faxmodem 2006 USR 5686G V.92 V.90 Unused NOS - Image 1 of 4

    US Robotics 56K Serial Controller Faxmodem 2006 USR 5686G V.92 V.90 Unused NOS

    Brand New ยท USRobotics
    (5)
    $49.99
    or Best Offer
    $13.10 shipping
  • DSI Digicom System Software & Modem Installation-A Subsidiary Of Creative - Mint - Image 1 of 4

    DSI Digicom System Software & Modem Installation-A Subsidiary Of Creative - Mint

    Pre-Owned ยท Creative
    $16.97
    or Best Offer
    $4.52 shipping
  • New, Sealed US Robotics Spotster 56k External Faxmodem Free Shipping - Image 1 of 4

    New, Sealed US Robotics Spotster 56k External Faxmodem Free Shipping

    Brand New ยท USRobotics
    $49.99
    Free shipping
  • USRobotics V.92 56K Faxmodem 5686 (No Ac Adapter) - Image 1 of 3

    USRobotics V.92 56K Faxmodem 5686 (No Ac Adapter)

    Pre-Owned ยท USRobotics
    (2)
    $36.00
    Was: $45.00was - US $45.00
    or Best Offer
    Free shipping
  • US Robotics Courier V.Everything with V.34 External Modem - Image 1 of 3

    US Robotics Courier V.Everything with V.34 External Modem

    Pre-Owned ยท USRobotics
    $35.00
    $11.40 shipping
  • U.S.Robotics V.92 0701 MODEM 5686 - Image 1 of 4

    U.S.Robotics V.92 0701 MODEM 5686

    Pre-Owned ยท USRobotics
    (1)
    $19.99
    or Best Offer
    Free shipping
  • Multitech MT5634ZBA MultiModem USB sku 93537159 - Image 1 of 4

    Multitech MT5634ZBA MultiModem USB sku 93537159

    Open Box ยท MultiTech
    $40.00
    or Best Offer
    Free shipping
  • 3COM U.S. ROBOTICS 5686 56K FAXMODEM external. Open box - Image 1 of 4

    3COM U.S. ROBOTICS 5686 56K FAXMODEM external. Open box

    Open Box ยท USRobotics
    (1)
    $29.99
    or Best Offer
    $4.99 shipping
  • US ROBOTICS V.92 EXTERNAL FAX MODEM #5686 MODEL 0701 - Image 1 of 4

    US ROBOTICS V.92 EXTERNAL FAX MODEM #5686 MODEL 0701

    Pre-Owned ยท USRobotics
    $24.99
    Free shipping
  • US ROBOTICS V.92 FAX MODEM MODEL 5686 - Image 1 of 4

    US ROBOTICS V.92 FAX MODEM MODEL 5686

    Pre-Owned ยท USRobotics
    (1)
    $10.00
    $11.00 shipping
  • US Robotics Fax Modem Sportster with X2 56K - 0459 - Image 1 of 3

    US Robotics Fax Modem Sportster with X2 56K - 0459

    Pre-Owned ยท USRobotics
    $14.99
    or Best Offer
    $6.29 shipping
  • US Robotics 56K V.90 External Faxmodem & Power Supply Sportster USR568602 - Image 1 of 4

    US Robotics 56K V.90 External Faxmodem & Power Supply Sportster USR568602

    Pre-Owned ยท USRobotics
    $10.00
    or Best Offer
    $9.88 shipping
    Only 1 left!
  • US ROBOTICS 3453C COURIER 56K BUSINESS MODEM W/ POWER ADAPTER - Image 1 of 4

    US ROBOTICS 3453C COURIER 56K BUSINESS MODEM W/ POWER ADAPTER

    Pre-Owned ยท USRobotics
    (1)
    $34.99
    or Best Offer
    $12.85 shipping
  • U.S. Robotics USR5686G V.92 Serial Controller Faxmodem 56Kbps RS-232 (Serial - Image 1 of 4

    U.S. Robotics USR5686G V.92 Serial Controller Faxmodem 56Kbps RS-232 (Serial

    Brand New ยท USRobotics
    (5)
    $209.55
    Was: $398.15was - US $398.15
    or Best Offer
    Free shipping
  • USRobotics V.Everything 56K Analog Modem 002806-00 With Console Cable - Image 1 of 4

    USRobotics V.Everything 56K Analog Modem 002806-00 With Console Cable

    Pre-Owned ยท USRobotics
    $39.99
    or Best Offer
    Free shipping
  • LOT 2 US Robotics 3453C External Serial Data Fax Modem - Image 1 of 4

    LOT 2 US Robotics 3453C External Serial Data Fax Modem

    Pre-Owned ยท USRobotics
    (1)
    $69.99
    or Best Offer
    Free shipping
  • Vintage US Robotics Faxmodem Sportster #0701 - Image 1 of 2

    Vintage US Robotics Faxmodem Sportster #0701

    Pre-Owned ยท USRobotics
    $19.99
    $7.25 shipping
  • Open Box - USRobotics 3453C Business Modem 56 Kbps - Image 1 of 4

    Open Box - USRobotics 3453C Business Modem 56 Kbps

    Open Box ยท USRobotics
    $35.00
    or Best Offer
    $19.60 shipping
  • ZOOM/FAX MODEM MODEL 2949 56K DUAL STANDARD V.90& K56FLEX 2949L - Image 1 of 4

    ZOOM/FAX MODEM MODEL 2949 56K DUAL STANDARD V.90& K56FLEX 2949L

    Open Box ยท Zoom
    $25.00
    or Best Offer
    $21.57 shipping
    Est. delivery Fri, May 23
  • US Robotics 56K V.92 Fax Modem 5686 64-005686-05 - Image 1 of 4

    US Robotics 56K V.92 Fax Modem 5686 64-005686-05

    Pre-Owned ยท USRobotics
    (1)
    $17.95
    or Best Offer
    $10.95 shipping
  • Zoom 3048 External RS-232 56k V.92 Faxmodem for Windows & MAC, Serial Port, NEW - Image 1 of 3

    Zoom 3048 External RS-232 56k V.92 Faxmodem for Windows & MAC, Serial Port, NEW

    Brand New ยท Zoom
    $29.99
    or Best Offer
    $10.65 shipping
  • Hayes Accura 56K Fax Modem 03328-A - Image 1 of 4

    Hayes Accura 56K Fax Modem 03328-A

    Pre-Owned ยท Hayes
    $25.99
    or Best Offer
    $10.36 shipping
  • Diamond Supra Express 56k Modem - Image 1 of 4

    Diamond Supra Express 56k Modem

    Pre-Owned ยท SUPRA
    $15.00
    $7.36 shipping
  • Actiontec external 56k/v.92 modem exv9212-01 - Image 1 of 4

    Actiontec external 56k/v.92 modem exv9212-01

    Pre-Owned ยท Action-Tec
    $75.00
    or Best Offer
    $12.57 shipping
  • US Robotics 5686 v.92 56K External Modem 0701 W/ AC ADAPTER - Image 1 of 4

    US Robotics 5686 v.92 56K External Modem 0701 W/ AC ADAPTER

    Pre-Owned ยท USRobotics
    (1)
    $18.96
    $14.95 shipping
  • MULTITECH MT5634ZBA-USB-V.92-AV MULTI MODEM USB, DATA/FAX MODEM - Image 1 of 4

    MULTITECH MT5634ZBA-USB-V.92-AV MULTI MODEM USB, DATA/FAX MODEM

    Open Box ยท MultiTech
    $53.99
    Free shipping
  • US ROBOTICS 3453C 2-PORT V.92 56K BAUD ANALOG BUSINESS MODEM - Image 1 of 4

    US ROBOTICS 3453C 2-PORT V.92 56K BAUD ANALOG BUSINESS MODEM

    Pre-Owned ยท USRobotics
    $10.00
    $9.80 shipping
  • Multitech MT5634ZBA MultiModem ZBA 56kb 93537150LF- Avaya CC: 700427537 unused - Image 1 of 2

    Multitech MT5634ZBA MultiModem ZBA 56kb 93537150LF- Avaya CC: 700427537 unused

    Open Box ยท MultiTech
    $45.00
    Free shipping
  • ZOOM/FAX MODEM MODEL 2949 56K  V.90 NEW - Image 1 of 1

    ZOOM/FAX MODEM MODEL 2949 56K  V.90 NEW

    Brand New ยท Zoom
    $22.95
    $10.00 shipping
  • US ROBOTICS 3453B COURIER 56K Business Modem - Image 1 of 2

    US ROBOTICS 3453B COURIER 56K Business Modem

    Pre-Owned ยท USRobotics
    (1)
    $24.99
    $6.34 shipping
  • US Robotics USRobotics3453C 56K External Serial Data Fax Modem - Image 1 of 4

    US Robotics USRobotics3453C 56K External Serial Data Fax Modem

    Pre-Owned ยท USRobotics
    (1)
    $34.99
    $9.99 shipping
  • US Robotics 0701 or 0648 Sportster 56K Fax Modem No Power Supply - Image 1 of 4

    US Robotics 0701 or 0648 Sportster 56K Fax Modem No Power Supply

    Pre-Owned ยท USRobotics
    $19.95
    $5.00 shipping
  • New! Genius 56k v92/v90 External Modem GM56EX with 240v UK PSU - Image 1 of 4

    New! Genius 56k v92/v90 External Modem GM56EX with 240v UK PSU

    Brand New ยท Genius
    $52.11
    $44.09 shipping
    Only 1 left!
  • m39~ Multitech Systems Multimodem MT9234ZBA-EMC V.92 Modem - New - Image 1 of 4

    m39~ Multitech Systems Multimodem MT9234ZBA-EMC V.92 Modem - New

    Brand New ยท MultiTech
    $39.99
    $9.75 shipping
    Only 1 left!
  • US ROBOTICS 3453B COURIER 56K Business Modem 64-003453-02 - Image 1 of 4

    US ROBOTICS 3453B COURIER 56K Business Modem 64-003453-02

    Pre-Owned ยท USRobotics
    (1)
    $55.00
    Free shipping
  • US Robotics 568602 56K Sportster External Faxmodem V90 & x2 00 - Image 1 of 4

    US Robotics 568602 56K Sportster External Faxmodem V90 & x2 00

    Pre-Owned ยท USRobotics
    $15.00
    or Best Offer
    $8.78 shipping
  • US Robotics Sportster V.90 External Faxmodem 56K Model 005686-03 - Image 1 of 4

    US Robotics Sportster V.90 External Faxmodem 56K Model 005686-03

    Pre-Owned ยท USRobotics
    (1)
    $12.99
    Was: $19.99was - US $19.99
    $7.25 shipping
  • MultiTech MultiModmes MT5634ZBA USB V.92 AV External Desktop Data Fax Modem - Image 1 of 4

    MultiTech MultiModmes MT5634ZBA USB V.92 AV External Desktop Data Fax Modem

    Pre-Owned ยท MultiTech
    $37.48
    Was: $49.97was - US $49.97
    or Best Offer
    $10.16 shipping
  • Hayes Accura 56K Fax Modem 03328-A - Image 1 of 4

    Hayes Accura 56K Fax Modem 03328-A

    Pre-Owned ยท Hayes
    $29.95
    or Best Offer
    $12.95 shipping
  • US Robotics 3453 Courier 56Kbps Business Modem - Image 1 of 2

    US Robotics 3453 Courier 56Kbps Business Modem

    Pre-Owned ยท USRobotics
    $16.75
    $16.65 shipping
  • Ayantra IML 560 Low Power 56 Kbps Industrial Modem - Image 1 of 4

    Ayantra IML 560 Low Power 56 Kbps Industrial Modem

    Open Box
    $7.79
    Was: $11.99was - US $11.99
    $9.25 shipping
  • US Robotics 5686 56K External Fax Modem V.92 - Image 1 of 3

    US Robotics 5686 56K External Fax Modem V.92

    Pre-Owned ยท USRobotics
    $24.99
    $8.65 shipping
  • US Robotics 3453C Courier 56K Global Business Modem - Image 1 of 4

    US Robotics 3453C Courier 56K Global Business Modem

    Pre-Owned ยท USRobotics
    (1)
    $18.61
    Was: $20.68was - US $20.68
    or Best Offer
    $16.00 shipping
  • U.S. Robotics USR5686G V.92 Serial Controller Faxmodem 56Kbps RS-232 (Serial - Image 1 of 4

    U.S. Robotics USR5686G V.92 Serial Controller Faxmodem 56Kbps RS-232 (Serial

    Brand New ยท USRobotics
    (5)
    $140.41
    Free shipping
  • Modem Blaster ISA Installation CD SHIPS N 24h - Image 1 of 3

    Modem Blaster ISA Installation CD SHIPS N 24h

    Brand New ยท Creative
    $16.98
    $5.50 shipping

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