Analog Terminal Adapter DeTeWe ETAB4 4×FXS analog ports, model 20350436

The DeTeWe ETAB4 is an analog terminal adapter with four FXS ports designed to connect analog telephones and fax machines to a compatible telephony environment. It enables legacy handsets and fax devices to operate through modern voice networks when used with an appropriate gateway or PBX. The adapter supports standard analog signaling and offers a compact solution for sites that need to preserve existing analog equipment while transitioning to digital or VoIP infrastructures.

Advantages

The unit provides four independent FXS interfaces, allowing multiple analog devices to remain in service. Its compact design simplifies installation in small offices or equipment cabinets, and compatibility with standard analog signaling ensures predictable behavior with a broad range of telephones and fax machines. The ETAB4 facilitates phased migration strategies by preserving investment in existing endpoints while enabling integration with newer telephony platforms.

Suitable for

• Small offices that need to keep analog phones or fax machines working with a modern PBX or VoIP gateway
• Installations where a limited number of analog ports are required without replacing legacy handsets
• Locations requiring analog fax integration into digital telephony systems
• Temporary or transitional deployments during migration to full IP telephony

Key specifications

• Analog interface: 4 FXS ports for connection of analog telephones and fax machines
• Signaling: Standard analog signaling suitable for tone dialing, pulse dialing (where supported), and fax transmission
• Form factor: Compact adapter designed for small installations and rack or shelf placement
• Power: External or built-in power supply depending on system configuration (check local installation requirements)
• Compatibility: Works with compatible gateways or PBX systems that accept FXS analog endpoints

How to use

Connect analog telephones or fax machines to the four FXS ports using standard telephone cables. Integrate the adapter with the telephony system by connecting its network or gateway interface according to the gateway or PBX installation guide. Configure line and signaling parameters on the gateway or PBX so that the connected analog devices are recognized and routed correctly. Verify dial plan and fax settings to ensure reliable voice and fax transmission.

Usage recommendations

Place the adapter in a ventilated location away from heat sources and ensure stable power. Test each connected telephone and fax for correct signaling and transmission after installation. For fax reliability, use recommended fax settings on the connected gateway or PBX and verify line quality. When planning a long-term migration, map critical analog endpoints and migrate them in phases to reduce disruption.