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Green PCI circuit board with four red FXO modules

Roby Technology Co., Limited

Roby Technology Co., Limited TDM400P 4 FXO PCI Telephone Accessory

SKU CH-KJWP-FQ8TX

Adds four analogue PSTN lines to a PC via PCI for Asterisk-based PBX and call-centre systems

  • Product typeAdapter
  • Details4 FXO
  • Key featuresPCI FXO Card
  • Connects four analogue PSTN lines via four FXO ports
  • PCI interface fits standard desktop expansion slots
  • Supported by Asterisk, Issabel, FreePBX and Dahdi drivers
  • Enables a low-cost VoIP PBX or call-centre build
  • FXS ports available for connecting analogue telephones

TDM400P 4-port FXO PCI card

The TDM400P is a PCI adapter equipped with four FXO modules for connecting analogue PSTN lines to a PC. It is intended for system integrators and small-business technicians building Asterisk-based IP PBX or call-centre platforms. The card uses standard DAHDI drivers and works with distributions such as Issabel, FreePBX and AsteriskNow.

Suits new installations needing four analogue trunks

This card suits deployments that require exactly four PSTN connections and have an available PCI slot. It does not suit systems that need FXS ports for analogue handsets, installations that require more than four trunks, or motherboards that only provide PCI Express slots.

Four FXO modules on a PCI interface

The decisive specification is the combination of four FXO ports and a legacy PCI connector. Buyers must confirm the host machine has a free PCI slot and that the telephony design calls for four analogue trunk interfaces.

How it compares

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

Price $43.99
Pricier than about 70% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameAsteriskStore
Model nameTDM400P
Part numberTdm400p PCI FXO
Product typeAdapter

Questions about this item

How often will the four FXO modules need replacement under normal use?

The TDM400P uses solid-state FXO modules with no moving parts, so they do not wear out and require no scheduled replacement.

What limits call capacity when the card runs continuously at full load?

The four FXO ports provide a hard limit of four simultaneous PSTN calls; no additional channels can be added to this board.

How much heat does the PCI card generate during all-day operation in a server?

The passively cooled card draws minimal power from the PCI slot and runs cool enough for continuous use in a ventilated chassis.

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