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PCIe x1 telephony card with four red FXO modules

Roby Technology Co., Limited

Roby Technology Co., Limited aex410-4o 4 FXO PCIe telephone accessory

SKU CH-W4P9-N94H2

Adds four analogue trunk ports to a PC via PCIe x1 for use with Asterisk, FreePBX, Issabel and DAHDI

  • Team affiliationRobyTech
  • League or teamRobyTech
  • Product typeAdapter
  • DetailsAnalog FXS / FXO Card
  • Key featuresSupports Asterisk , Issabel, FreePbx ,AsteriskNow ,Dahdi ...
  • Connect up to four PSTN lines with four FXO modules
  • Install in any PCIe x1 slot for broad compatibility
  • Build an Asterisk PBX using open-source software and this card
  • Supported by DAHDI 2.2.0 with MG2 echo cancellation
  • Configure channels via dahdi_genconf and dahdi_cfg tools

Four-port FXO PCIe card for Asterisk PBX builds

The RobyTech aex410-4o installs in a PCI Express x1 slot and provides four FXO interfaces for connecting PSTN lines to an IP PBX. It targets system integrators and small-business IT staff who need analogue trunk connectivity without proprietary hardware.

Sustained call handling with DAHDI drivers

The card uses the DAHDI 2.2.0 stack and MG2 echo cancellation across all four channels. Under continuous traffic the driver maintains channel stability and echo suppression without the latency spikes that can appear in burst-only testing.

Passive cooling and low-profile fit

A 2U low-profile bracket allows installation in shallow rackmount chassis. The board draws power solely from the PCIe slot, adds no active fan noise, and runs within the thermal envelope of typical server airflow.

How it compares

Measured against everything we stock in Headsets, Cords & Phone Mounts, at today’s prices. Recalculated every night.

Price $125.99
Pricier than about 85% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameRobyTech
Model nameAex410
Part numberAex410-4o
Product typeAdapter
More details
Team affiliationRobyTech
League or teamRobyTech

Questions about this item

Does the aex410-4o generate noticeable heat or fan noise when handling four PSTN lines continuously?

The card is a passive PCIe x1 adapter with no onboard fan, so it adds no audible noise and draws only the modest power the slot supplies.

What must already be in the PC for the aex410-4o to function?

A free PCIe x1 slot and a supported OS running Asterisk, DAHDI 2.2.0, Issabel, FreePBX or compatible software.

Will the aex410-4o work alongside an older TDM400 or TDM410 card in the same server?

Yes — both use the DAHDI driver stack, so the aex410-4o can coexist with legacy Digium cards; each simply appears as additional DAHDI channels.

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