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Green printed circuit board with four red and four green modules, PCI bracket, low-profile form factor

Roby Technology Co., Limited

Roby Technology Co., Limited TDM800P Asterisk Card 4 FXO 4 FXS PCI telephone accessory

SKU CH-B5J3-BZCRQ

PCI card with four FXO ports for PSTN lines and four FXS ports for analog phones, low-profile for 2U servers

  • Product typeAsterisk Card For IP PBX System
  • DetailsAnalog FXS / FXO Card
  • Key featuresSupports Asterisk , Issabel, FreePbx ,AsteriskNow ,Dahdi ...
  • Connect up to four PSTN lines with four FXO ports
  • Attach up to four analogue handsets with four FXS ports
  • Fits 2U servers using the included low-profile bracket
  • Works with Asterisk, FreePBX, Issabel, Dahdi and other Dahdi-based platforms
  • Build a VoIP PBX or gateway using open-source software and a standard PC

Product identity

The Roby Technology TDM800P is a PCI telephony card that adds four FXO and four FXS ports to a server. It targets system integrators building Asterisk-based PBX, call-centre or VoIP gateway appliances on standard PC hardware.

Installation prerequisites

Verify the host has a free PCI slot and runs a DAHDI-compatible distribution such as FreePBX, Issabel or plain Asterisk. The low-profile bracket fits 2U chassis, so confirm rack height before ordering. No external power connector is mentioned, so the slot must supply sufficient current.

Build and daily use

Red FXO modules connect to PSTN lines while green FXS modules attach to analogue handsets, giving immediate visual confirmation of port role. Eight RJ-style ports sit on a single bracket, keeping cabling tidy in dense racks. The card is recognised by DAHDI 2.2.0 with MG2 echo cancellation on all eight channels.

How it compares

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

Price $154.99
Pricier than about 88% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameAsteriskStore
Model nameTDM800P
Product typeAsterisk Card For IP PBX System

Questions about this item

What comes in the box with the TDM800P and what must be purchased separately?

The card ships with four red FXO modules and four green FXS modules installed. You must supply a compatible PCI slot, a PC, and PSTN lines or analogue handsets to use the ports.

How do I decide between the FXO and FXS versions of the TDM800P?

This model includes both: four FXO ports for PSTN trunks and four FXS ports for analogue phones. Choose it when you need to connect outside lines and local extensions on the same card.

What does the eight-channel DAHDI map mean for a live Asterisk system?

Channels 1–4 appear as FXS Kewlstart extensions with MG2 echo cancellation, and channels 5–8 appear as FXO Kewlstart trunks with the same canceller, ready for dahdi_genconf and dahdi_cfg.

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