Introduction to the TERRA-FXO 2‑Port FXO SIP VoIP Gateway
TERRA-FXOis a compact, purpose-built IP-to-telecom gateway from the TERRACOM Audio-over-IP family designed to bridge modern SIP/IP audio environments with legacy PSTN and analogue telephone lines. With two FXO interfaces, full‑duplex audio, built‑in acoustic echo cancellation (AEC) and noise reduction, plus Power over Ethernet (PoE) and on-board storage, the TERRA-FXO is aimed at integrators, AV/PA system designers and telecom installers who need reliable, low‑power PSTN integration for paging, intercom and hybrid voice solutions.
Key features at a glance
- 2 FXO interfacesfor connecting analogue PSTN lines or POTS circuits.
- Full‑duplex audiowith Acoustic Echo Cancellation (AEC) and Noise Reduction for clear two‑way audio.
- Wide codec support: G.711 (µlaw/alaw), G.722, G.726‑32, G.727‑32, G.729 and PCM16K for interoperability and bandwidth optimization.
- On-board recordingsin G.711, G.722, WAV and MP3 formats using ≈80 MB internal storage for message capture and logging.
- Flexible power: PoE or 24 VDC input with very low power use (approximately 2.66 W).
- Management & control: Local web GUI, SNMP support and optional RS232/RS485 control interface on some variants.
Detailed specifications and the benefits they deliver
The TERRA-FXO provides two FXO (Foreign eXchange Office) telephone interfaces, enabling the gateway to seize and interact with analogue telephone lines from the PSTN. The two‑line capacity makes it suitable for small paging trunks, backup PSTN lines or dual‑line intercom gateways without the cost or rack space of larger multi‑port devices.
Audio is handled in full‑duplex mode with integrated Acoustic Echo Cancellation and Noise Reduction. This combination ensures intelligible conversations and clearer paging announcements in noisy environments or over long analogue loops. The device supports a broad set of SIP codecs — from the high‑fidelity G.722 to narrowband, bandwidth‑efficient codecs such as G.729 — letting you balance voice quality and network bandwidth according to the deployment.
On-board storage of roughly 80 MB allows the gateway to record calls, messages or audio events locally in formats including G.711, G.722, WAV and MP3. This is useful for short-term logging, message playback for paging systems or capture of diagnostic samples during troubleshooting. Management is via a browser‑based local GUI and SNMP, simplifying remote monitoring, diagnostics and configuration in managed networks. For integrators requiring hardware control integration, optional RS232 or RS485 variants may be available.
Power options include standard Power over Ethernet (PoE) and a 24 VDC input. PoE support streamlines deployments by allowing the device to be powered from network switches, eliminating the need for local power outlets at installation points. With a typical consumption of approximately 2.66 W, the TERRA-FXO is energy‑efficient, well suited to distributed installations where multiple endpoints must be cost‑effective to power. Its compact form factor (104 × 32 × 109 mm) and light weight (≈430 g) make it easy to mount in cabinets, behind panels or near telephone demarcation points.
The device is intended for professional installation. The product listing notes that certification data is insufficient in the supplied documentation, so installers should confirm CE/UKCA or other local certifications and ensure compliance with regional PSTN regulations before deployment. Reference to official Terracom documentation is recommended for wiring, safety and configuration details.
Use cases and scenarios where TERRA-FXO excels
- SIP paging and intercom integration:Use the TERRA-FXO to bridge SIP-enabled paging or IP intercom systems to existing PSTN telephone circuits so staff can page via telephone or allow telephone‑based call‑in paging.
- Legacy line bridging during migration:For organisations migrating to full VoIP but retaining some PSTN services (emergency numbers, fax endpoints, or leased lines), this gateway offers a compact, low-cost bridge without forklift upgrades.
- Backup and redundancy:Small offices or campuses can use FXO ports as PSTN fallbacks for centres that primarily use SIP trunks; the gateway can hand off calls to analogue lines when VoIP services are unavailable.
- Distributed AV/PA systems:Integrators can use the TERRA-FXO to connect remote analogue horns, telephone‑activated paging ports or legacy amplifiers into IP audio ecosystems for unified control and monitoring.
- Edge installations and remote sites:PoE and low power consumption make the device suitable for remote cabinet deployments where power budgets are constrained.
Comparisons with similar products on the market
There are single‑line FXO adapters and analog telephone adapters (ATAs) on the market designed for home or small office use. The TERRA-FXO targets a professional niche: it provides full‑duplex audio with AEC, broader codec support, on‑board recording and SNMP management, features that go beyond consumer ATAs and single‑line adapters that often lack enterprise management or robust audio processing.
Larger FXO gateways (8/16/24 ports) are designed for high‑density PSTN integration. Compared with these, the TERRA-FXO is compact, lower cost and lower power — a better fit where only a couple of analogue lines are required. For projects that need scalability, a multi‑port gateway may be preferable; however, for distributed or small‑scale locations where rack space and budget are limited, a 2‑port device like the TERRA-FXO is often the most practical choice.
- PoE support:Not all FXO devices support PoE; this simplifies power and cabling in networked AV or telecom closets.
- AEC and noise reduction:High‑quality audio processing helps in paging/intercom contexts where echo and ambient noise are common.
- On‑board recordings:Small internal storage for messages is a value add for installations that need short‑term capture without separate recording servers.
Customer testimonials and reviews
At the time of writing there are no verified public customer testimonials included with the product data provided. For prospective buyers, typical areas highlighted by integrators evaluating similar TERRACOM devices include ease of web GUI configuration, reliable pass‑through of PSTN lines, low‑power operation via PoE and the convenience of on‑device recording for diagnostics. If you require real‑world customer reviews, ask the vendor for references or check industry forums and reseller pages for user feedback specific to the ITM003606 SKU.
Pricing, warranty and procurement considerations
The suggested retail price for the TERRA-FXO is listed at US$449.00. The provided cost price is US$367.93. Warranty information was not specified in the supplied data, so confirm warranty terms, return policy and support options with the reseller or manufacturer before purchase. Also verify required regional certifications (CE/UKCA) and any telephony registration requirements for connecting devices to public telephone networks in your country.
Conclusion — why choose the TERRA-FXO
TheTERRA-FXO2‑Port FXO SIP VoIP Gateway fills a practical niche for integrators and installers who need a compact, energy‑efficient bridge between SIP/IP audio systems and legacy PSTN or analogue telephone lines. Its combination of PoE power, robust audio processing (AEC and noise reduction), broad codec support, local recording capability and manageable two‑line capacity makes it well suited to paging/intercom applications, small office PSTN retention strategies, and edge installations where simplicity and reliability matter.
When your project requires a professional, low‑power FXO gateway without the footprint and cost of high‑density appliances, the TERRA-FXO is worth evaluating. Confirm compliance and warranty details with your supplier, test interoperability with your SIP platform, and consider the device as a practical building block for hybrid telephony and IP audio systems.
