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Green PCI card with two red FXO and two green FXS modules

Roby Technology Co., Limited

Roby Technology Co., Limited tdm410p 2 FXO 2 FXS PCI telephone accessory

SKU CH-EAW1-MNCKH

A PCI telephony card with two FXO ports for PSTN lines and two FXS ports for analogue handsets, enabling an Asterisk-based PBX or gateway

  • TypeAdapter
  • Specifications2 fxo 2 fxs
  • Connect up to two analogue handsets via two FXS ports
  • Link two PSTN lines through two FXO ports for inbound calls
  • Install in any PCI slot for quick server integration
  • Build a low-cost IP PBX with Asterisk, Dahdi, FreePBX, Issabel or VitalPBX
  • Colour-coded modules — red for FXO, green for FXS — simplify wiring

RobyTech tdm410p PCI telephony card

This RobyTech tdm410p is a PCI telephony adapter that adds two FXO and two FXS ports to a PC. It lets integrators connect PSTN lines and analogue handsets to build a VoIP PBX or gateway using open-source telephony software.

Installation notes for the tdm410p

The card fits a standard PCI slot and ships with the four modules pre-installed — red for FXO, green for FXS. Common issues arise when the host lacks a 5 V PCI slot or when DAHDI drivers are not loaded before Asterisk starts, causing channels to stay down.

PCI bus limits for analogue voice

The legacy PCI interface caps signalling bandwidth and interrupts the CPU for every voice frame, so high call counts increase processor load. Only four analogue ports are supported per card, so larger deployments need multiple cards or a different bus architecture.

Highlights

  • Connect up to two analogue handsets via two FXS ports
  • Link two PSTN lines through two FXO ports for inbound calls
  • Install in any PCI slot for quick server integration
  • Build a low-cost IP PBX with Asterisk, Dahdi, FreePBX, Issabel or VitalPBX
  • Colour-coded modules — red for FXO, green for FXS — simplify wiring

Specifications

BrandRobyTech
Modeltdm410p
TypeAdapter
Specifications2 fxo 2 fxs

Questions about this item

How do I verify the tdm410p is working after installing it in a PCI slot and running dahdi_genconf?

Run dahdi_cfg -vvvv and confirm four channels appear: channels 1 and 2 as FXO Kewlstart with MG2 echo canceller, channels 3 and 4 as FXS Kewlstart with MG2 echo canceller, matching the DAHDI 2.2.0 output shown in the configuration example.

What comes in the box with the tdm410p and what must I source separately?

The card ships with two red FXO modules and two green FXS modules already fitted; you must supply a PCI slot, PSTN lines for the FXO ports, analog telephone sets for the FXS ports, and a PC running Asterisk, DAHDI, FreePBX, Issabel, VitalPBX or FreeSWITCH.

The product lists a single tdm410p model with 2 FXO and 2 FXS ports — how do I decide if this capacity fits my needs?

Choose this version if you need exactly two PSTN trunk connections and two analog extensions; the fixed 2 FXO / 2 FXS layout supports up to four simultaneous DAHDI channels (1‑4) as shown in the Issabel configuration example.

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