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Black Box Short Haul Modem Nonpowered, ASYNC SHM

Black Box ME721A-F-R3

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Manufacturer Part#  ME721A-F-R3

UPC Code: 082208811152

Provantage Code:  BABXF12

Condition:  Factory New

  • Product Type: Data Transfer Adapter
  • TAA Compliant: Yes

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NetworkingModemsDSL Modems


Black Box ME721A-F-R3 Specifications

    Short Haul Modem Nonpowered, ASYNC SHM

At a Glance

    • Full duplex operation over 4-wire CATx
    • Data rate up to 19.2 kbps
    • Range of up to 8 km (5 miles) at 19.2 kbps over 24 AWG lines
    • Transformer isolation to protect unit
    • DCE/DTE switch for easy direct connection no special cables needed.
    • Interface powered by handshake signals no AC power required


    For an interface-powered modem, the SHM-NPR really packs a punch. Forget about the 50-foot (15.2-m) RS-232 limit. This simple, plug-in SHM pushes data up to 1.2 miles (2 km) at 19.2 kbps or more than 5 miles (8 km) at 2400 bps.

    This 4-screw SHM has a DB25 female connector that plugs into your terminal.

    To connect your asynchronous devices to a host, use a pair of our SHM-NPRs - or a single SHM-NPR and a Short-Haul Modem-B Async (ME800A-R3). The SHM-NPR is powered from the RS-232 interface. If your device doesn't provide interface power, use the ME800A-R3 on one side of the line.

Environmental Certification




Product NameShort Haul Modem Nonpowered, ASYNC SHM
Manufacturer Part NumberME721A-F-R3
Product TypeData Transfer Adapter
Connector Type on First EndDB-25 RS-232 Serial - Female
Connector Type on Second EndTerminal Block
Adapter TypeSerial/Terminal Block
TAA CompliantYes
Environmentally FriendlyYes
Connector on First End Details1 x 25-pin DB-25 RS-232 Serial Female
Connector on Second End Details1 x Terminal Block
Country of OriginUnited States
Limited Warranty1 Year
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