ACT RJ11 (4P/4C) modular plug for flat cable

The ACT RJ11 (4P/4C) modulaire connector for flat cable is a compact modular plug designed to terminate flat telephone cable for standard RJ11 voice and low-speed data applications. Supplied in packs of 25, the connector supports four conductors and fits typical handset and telephone line sockets. The design provides a straightforward way to create secure mechanical and electrical terminations on flat cable runs used in voice telephony and related low-bandwidth connections.

Advantages

These ACT RJ11 connectors offer consistent contact alignment and a compact profile suitable for confined installation spaces. The modular design simplifies termination on flat cable, allowing reliable insertion of conductors and a secure latch to maintain connection. Supplied in multi-packs of 25, the product supports small-scale deployment or repetitive installations while reducing the need to handle individual loose connectors.

Suitable for

• Terminating flat telephone cable for landline handsets and base units
• Small-scale office or home installations requiring multiple RJ11 terminations
• Repairing existing telephone cables or creating custom-length voice leads

When it may not be suitable

This connector is intended for low-speed voice and basic data lines and is not designed for high-speed networking or broadband Ethernet applications. It supports only four conductors, so it is unsuitable where six-conductor (6P) or higher pin count connectors are required for additional lines or features.

Key specifications

• Connector type: modular RJ11 style for flat cable
• Contact configuration: 4 positions, 4 conductors (4P/4C)
• Pack quantity: 25 connectors per pack
• Application: voice telephony and low-bandwidth data
• Physical form factor: compact modular plug with latch

How to use

Prepare the flat cable by stripping a short section of the sheath to expose the four conductors, taking care not to nick the insulation. Align the conductors in the correct order and insert them fully into the connector until the cable seats firmly against the plug shoulder. Use appropriate crimping or insertion tooling recommended for modular plugs to secure contacts and ensure a reliable electrical connection. Verify the latch engages and test continuity before final installation.

What to consider before purchase

• Confirm that a 4P/4C connector meets your line and feature requirements (single-line voice or basic data).
• Ensure compatibility with flat cable dimensions used in your installation.
• Plan for the necessary crimping or insertion tool if you do not already have one.

Recommendations

For consistent results, use a reputable modular-plug crimping tool sized for RJ11 flat-cable plugs and test each terminated cable with a line tester to confirm proper wiring and continuity before connecting to live equipment.