Modular RJ ISDN Telephone Extension ShiverPeaks 70226-8/4W with 8/4 Western connector

The ShiverPeaks Modular RJ ISDN Telephone Extension 70226-8/4W is a wired extension cable designed for ISDN and RJ-based telephone systems. It provides a modular RJ interface with an 8-position/4-conductor Western connector configuration at both ends, enabling a direct wired link between handsets, base units and PBX ports. The cable is intended for installations where a stable, low-latency wired connection is required for telephony and ISDN voice channels.

Advantages

This extension offers a standardized modular RJ interface and an 8/4 Western connector layout that matches common ISDN and legacy telephone wiring. The wired design ensures signal stability and predictable performance compared with wireless alternatives. The cable length and fixed connector types simplify installation in office cubicles, PBX racks and residential ISDN setups without the need for additional adapters when matching equipment uses an 8/4 wiring scheme.

Suitable for

• Extending handset connections to base units in office telephones
• Connecting ISDN terminals or adapters to PBX ports
• Replacing or routing existing RJ-based telephone wiring in residential ISDN installations
• Temporary or permanent wired links in small business telephony racks

Key specifications

• Connector type: modular RJ with 8-position/4-conductor Western plug and coupling
• Cable function: ISDN and RJ-based telephone signal extension
• Wiring configuration: 8 pins, 4 active conductors
• Color: white
• Typical use: in-wall or desk-level wired telephone connections

How to use

Plug the Western connector into the corresponding 8/4 jack on the telephone handset or base unit and insert the coupling end into the receiving jack on the PBX, terminal adapter or wall outlet. Ensure connectors are fully seated to maintain reliable contact. If routing the cable through furniture or cable channels, avoid sharp bends and compressive strain near the connectors to preserve conductor integrity. Test the connection by placing a call or verifying ISDN terminal signalling after installation.

Recommendations

Use this modular extension indoors in protected environments and keep it away from sources of high electromagnetic interference. For best results, match the cable wiring configuration to the connected devices (8/4) and avoid mixing with different pinouts without appropriate adapters or re-wiring.