Brands Guides About
Monoprice 101137 DB9 F/F Null Modem Adapter — main product image
Monoprice

Monoprice 101137 DB9 F/F Null Modem Adapter

★★★★★4.4 (17 reviews)

Facilitate Data Transfer with Reliable ConnectivityThe Monoprice 101137 DB9 F/F Null Modem Adapter is designed to facilitate direct connections between computers or other devices for file transfer. This null modem adapter features a female to female DB9 connector configuration, with crossed trans...

$3.75*
✓ In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Facilitate Data Transfer with Reliable Connectivity

The Monoprice 101137 DB9 F/F Null Modem Adapter is designed to facilitate direct connections between computers or other devices for file transfer. This null modem adapter features a female to female DB9 connector configuration, with crossed transmit and receive conductors, ensuring reliable communication.

  • Connector Type: DB9 Female to Female
  • Application: Null Modem (Direct Computer to Computer Connection)
  • Function: Facilitates File Transfer
  • Configuration: Crossed Transmit and Receive Conductors

Key Features

RS-232 DB 9 pin female to female null modem

Null modems are used to connect two computers or other devices together to achieve file transfer

Null modem connectors are different from straight through connectors because the receive and transmit conductors are crossed

This is a miniature null modem with female connectors on each side

Specifications

Type
Null Modem Adapter
Connectors
DB9 Female to Female
Pin Configuration
RS-232 DB 9 pin

Pros & Cons

👍 Pros

  • This null modem adapter allows two computers or devices to connect for direct file transfer without a modem.
  • The miniature design of this adapter provides a compact solution for RS-232 DB9 serial connections.
  • Female connectors on both sides ensure compatibility with standard DB9 male cables, simplifying hookup.
  • Its specific null modem wiring, with crossed transmit and receive lines, is essential for direct device communication.
  • This adapter is purpose-built for RS-232 DB9 pin female to female null modem applications, ensuring correct functionality.

👎 Cons

  • This null modem adapter is specifically for DB9 connections, limiting its use to devices with that port type.
  • The miniature form factor might be challenging to handle for users with dexterity limitations.
  • It is designed for a very specific null modem function, not for general-purpose straight-through serial connections.
  • This adapter does not convert signals or alter voltage, only re-wires existing DB9 lines for null modem use.
  • The adapter requires a male-to-male DB9 cable for connection to two female-port devices.

Frequently Asked Questions

This null modem adapter is primarily used to connect two computers or other serial devices directly to facilitate file transfer without the need for a modem.
This Monoprice 101137 adapter features DB9 female connectors on both sides, making it a female to female null modem.
Null modem connectors differ from straight-through connectors because they cross the receive and transmit conductors, allowing two DTE devices to communicate directly.
This particular Monoprice null modem is described as a miniature null modem, offering a compact design.
This indicates it's designed for RS-232 serial communication, featuring a 9-pin configuration, and has female connectors on both ends, allowing connection between two male DB9 cables or devices.

Related Products