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
Light-grey cable with 3.5 mm TRS plug on one end and DB9 female socket on the other, 1.83 m long

Aurora Multimedia

Aurora Multimedia 3.5 mm TRS to DB9 Female Null-Modem Cable 1.83 m

SKU CH-MQW6-D487K

Connects a 3.5 mm TRS port to a DB9 female port with null-modem pin-out over 1.83 m

  • Connects 3.5 mm TRS devices to DB9 female ports
  • Null-modem wiring enables direct device-to-device communication
  • Pin 2 transmits and pin 3 receives for accurate data flow
  • 83 m length gives flexible equipment placement
  • Durable construction withstands regular use

Purpose and audience

This cable connects a device with a 3.5 mm TRS port to equipment using a DB9 female serial interface. It serves installers and technicians who need a null-modem link for data or control signals between mismatched connectors.

Build and daily use

The 1.83 m length gives enough slack for rack or desktop routing without excessive coils. A null-modem pinout routes DB9 pin 2 to transmit and pin 3 to receive, so connected ports communicate directly without a separate crossover adapter.

What the bundle changes

No additional adapters, drivers or software are included; the cable alone provides the physical link. Users must confirm that their host and peripheral expect this exact TRS-to-DB9 wiring before installation.

Highlights

  • Connects 3.5 mm TRS devices to DB9 female ports
  • Null-modem wiring enables direct device-to-device communication
  • Pin 2 transmits and pin 3 receives for accurate data flow
  • 83 m length gives flexible equipment placement
  • Durable construction withstands regular use

Specifications

No published specifications for this item yet.

Questions about this item

What signals does the 3.5 mm TRS to DB9 female cable carry on pins 2 and 3?

Pin 2 on the DB9 end transmits data and pin 3 receives data, giving a null-modem crossover between the TRS plug and the DB9 socket.

What physical space is needed for the DB9 female connector?

The DB9 female end requires a standard D-sub 9-pin panel cut-out or mating male connector; the cable itself is 1.83 m long.

How do you connect the cable and which orientation mistake is common?

Plug the 3.5 mm TRS jack into the source device and the DB9 female onto a male DB9 port; the frequent error is reversing the transmit and receive lines by using a straight-through adapter instead of the null-modem wiring.

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

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.