We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Short 25 cm Micro USB male to RJ9 4P4C male converter cable, compact form factor with flexible jacket

SMUGDESK

SMUGDESK 0.25M USB Micro Male to RJ9 4P4C Male Data Converter

SKU CH-JS6P-FBYYV

Converts a Micro USB male port to an RJ9 4P4C male plug for telephone handsets, headsets and custom communication hardware using a compact 25 cm cable

  • Converts Micro USB to RJ9 4P4C for specialised device connection
  • Compact 25 cm length keeps wiring tidy in tight spaces
  • Standard 4P4C pinout fits compatible telephone handsets and headsets
  • Durable cable jacket resists daily bending for stable signal transmission
  • Suits call-centre headset mods and custom communication hardware projects

Interface Conversion

This 0.25 meter cable converts a Micro USB male port to an RJ9 4P4C male plug for specialised communication hardware. It solves interface mismatches on modified telephone handsets, call centre headsets and custom DIY devices. No driver installation is required for the physical connection. The short length keeps wiring tidy inside tight equipment spaces.

Target Users

This converter suits technicians adapting specific headsets or handsets that accept a Micro USB signal through an RJ9 4P4C socket. It fits confined installations where a 25 centimetre cable prevents excess slack. Buyers needing a standard straight-through RJ9 cable or a different pin assignment cannot use this custom wired adapter. It also does not serve devices requiring a USB host function.

Pin Compatibility

The cable follows a strict 4P4C RJ9 pin definition that must match the target device exactly. Generic RJ9 phones or headsets often use different pin assignments and will not function with this converter. Verifying the equipment pinout before purchase is essential because the wiring is fixed. Mismatched pins result in no signal or device malfunction.

How it compares

Measured against everything we stock in Serial & Protocol Converters, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 70% of the 121 comparable items (median $19.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

What does the 25 cm length mean when the cable is installed?

The 25 cm span keeps the link tidy inside tight equipment bays or on a desktop, leaving no coiled surplus that can snag or block airflow.

What interface standard does the RJ9 4P4C end follow and what does that limit?

The plug uses the standard 4P4C RJ9 pinout, so it only works with devices wired to that exact pin assignment; generic handsets with different wiring will not function.

What physical space and port types are needed to mount this converter?

You need a free Micro USB male port on the host side and a matching RJ9 4P4C female socket on the device side, plus roughly 25 cm of clear routing space for the short cable.

More in Serial & Protocol Converters

Similar items