# Null Modem Cable OEM CABLE-138 9-pin female to 9-pin female, 1 m

**URL:** https://aio.lv/en/product--oem-cable-138--4189988
**Data updated:** 2025-12-29 15:45 (EET)
**Category:** Serial & Parallel Cables
**Manufacturer:** OEM
**Manufacturer code:** CABLE-138
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.89 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 3.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-cable-138--4189988

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 06.07.2026 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Null modem cable OEM CABLE-138 is a 1 m serial crossover cable with 9-pin female (DB9) connectors at both ends. Designed to connect two RS-232 DTE devices directly for data transfer, configuration or diagnostics without a modem. Suitable for serial communication between PCs, industrial equipment, routers and legacy devices; offers straightforward plug-and-play use.

## Long description

Null Modem Cable OEM CABLE-138 is a 1 m serial crossover cable with 9-pin female (DB9) connectors on both ends. It is intended to connect two RS-232 DTE devices directly for data transfer, configuration or diagnostics without using a modem. The cable supports straightforward plug-and-play use for serial communication between PCs, industrial equipment, routers and other legacy devices.
Advantages
The OEM CABLE-138 provides a ready-made null modem wiring that reverses the transmit and receive lines, eliminating the need to rewire devices. Its 9-pin female DB9 connectors allow compatibility with a wide range of RS-232 ports, and the 1 m length keeps connections tidy while offering enough reach for desktop or bench setups. The cable is simple to install and requires no software or drivers.
Suitable for
Direct serial communication between two PCs or laptops
Connecting industrial controllers, PLCs and measurement instruments
Router and network equipment console connections
Diagnostics, configuration and firmware updates of legacy devices
Key specifications
Model: OEM CABLE-138
Connector type: 9-pin female (DB9) — both ends
Cable type: Null modem (serial crossover)
Length: 1 m
Interface standard: RS-232
How to use
Plug each DB9 female connector into the RS-232 serial port of the devices you want to connect. Ensure ports are powered and set to compatible baud rate, parity and flow control settings on both devices. No additional drivers are required; once physical connection and serial settings match, communication can begin for data transfer, configuration or diagnostics.
Usage recommendations
Use the cable in short-distance, low-speed serial links typical for configuration and diagnostics. Avoid routing the cable near high-voltage lines or sources of strong electromagnetic interference to maintain reliable RS-232 communication. For longer runs or environments with high interference, consider using line drivers or alternative serial interfaces.

## FAQ

### How much does the Null Modem Cable OEM CABLE-138 9F–9F 1 m cost, and is it available for purchase?

The price is 3.89 € (valid at the time of publication and already includes all taxes). The item is available for order — 40 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Wednesday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All OEM products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized OEM service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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