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

Roby Technology Co., Limited

Roby Technology Co., Limited TDM400P Asterisk PCI Voice Board 2 FXO 2 FXS Modules

SKU CH-N9MC-XEW49

Adds two analogue trunk ports and two extension ports to a PCI slot for building an Asterisk-based PBX with DAHDI 2.2.0 support

  • Product typeAdapter
  • DetailsAsterisk PCI Voice Board
  • Key featuresPCI FXO Card Dahdi Card
  • Supports Asterisk, Issabel, FreePBX and Dahdi drivers for IP PBX builds
  • Two FXO modules connect analogue PSTN lines to the system
  • Two FXS modules link standard telephones to the board
  • PCI interface fits desktop and server expansion slots
  • DAHDI 2.2.0 tools provide echo cancellation and channel configuration

What the card does

The Roby TDM400P is a PCI telephony board that ships with two FXO and two FXS modules. It lets a standard PC connect up to two analogue telephone lines and two analogue handsets or fax machines. The board runs on the open-source DAHDI driver stack and works with Asterisk, FreePBX, Issabel, VitalPBX, FreeSwitch and Isabel platforms.

Who it suits and who it does not

Installers building a small-office IP PBX, a call-centre gateway or a SIP trunk termination point will find the four-port mix covers both inbound PSTN trunks and local extensions in one slot. Sites that need more than two PSTN lines, more than two analogue extensions, digital ISDN/PRI interfaces or a PCI Express form factor should look at a different card.

The deciding specification

The board uses a legacy PCI connector and is supported by DAHDI tools version 2.2.0, so the host motherboard must provide a free PCI slot and the operating system must be able to load the 2.2.0 driver package.

How it compares

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

Price $36.99
Pricier than about 67% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameAsteriskStore
Model nameTDM400P
Part numberTDM400P 2 FXO 2 FXS
Product typeAdapter

Questions about this item

Should I pick the TDM400P with two FXO and two FXS modules or a different port mix?

This listing supplies exactly two FXO ports for PSTN lines and two FXS ports for analogue telephones; no other port combination is offered.

What does the DAHDI 2.2.0 version mean when the card is installed in a live PBX?

DAHDI 2.2.0 provides the kernel drivers and user-space tools that let Asterisk, FreePBX, Issabel or FreeSWITCH recognise the four ports, handle call signalling and run the MG2 echo canceller on each channel.

Which bus interface does the TDM400P use and what practical limit does it impose?

The card plugs into a standard PCI slot, so it fits legacy desktop or server motherboards that still provide PCI; it cannot be used in PCIe-only systems.

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