FXS100 / FXO1001-port modules for A400 buildsUse these modules for compact A400 deployments that need a small number of FXS, FXO, or mixed analog ports.
Integrated FXS/FXO Telephony Access for PBX Servers
Add PCIe analog telephony cards to a standard Asterisk PBX server, enabling direct connection to analog phones, fax devices, PSTN lines, and legacy PBX trunks without deploying a separate analog gateway.
- Interfaces
- FXS / FXO
- Expansion
- PCIe Analog Card
- Range
- 1 to 24 Ports
Map analog line roles
Classify every copper line before choosing a model. Station devices need FXS, outside lines need FXO, and mixed sites should document both counts.
- Phones and fax lines need FXS
- PSTN trunks need FXO
- Mixed sites need a port map
Check modules, bus, and power
After the line role is clear, check the hardware pieces that decide install fit: module family, port count per module, bus type, power input, and optional echo cancellation.
FXS100 / FXO1001-port modules for A400 builds
FXS400 / FXO4004-port modules for higher-density cardsUse these modules with A810, A1610, and A2410 when the deployment requires more analog ports per card.
PCIe host interfaceModern motherboard defaultUse PCIe for current server boards; choose PCI only for older PCI-only platforms.
Card power connectorPower input confirmationCheck card power input and available server leads before finalizing the configuration.
HWEC hardware echo cancellationHardware DSP echo processingAdd HWEC when the deployment needs dedicated echo handling on the card.
Choose the A-series capacity
Select the card by total analog port requirement and module type. A400 fits compact systems, A810 supports branch expansion, A1610 covers denser wiring plans, and A2410 reaches the largest A-series analog capacity.
Telephony card model
A400
Compact A-series option for small FXS, FXO, or mixed analog builds.
- Capacity tier
- Entry analog card
- Port ceiling
- Up to 4 analog ports
- Module type
- FXS100 / FXO100
- Deployment role
- Small server or lab PBX
Telephony card model
A810
Mid-range card for branch servers that need more analog ports than an entry build.
- Capacity tier
- Mid-range analog card
- Port ceiling
- Up to 8 analog ports
- Module type
- FXS400 / FXO400
- Deployment role
- Branch PBX expansion
Telephony card model
A1610
Higher-density option for sites with a larger station or trunk wiring plan.
- Capacity tier
- High-density analog card
- Port ceiling
- Up to 16 analog ports
- Module type
- FXS400 / FXO400
- Deployment role
- Dense station or trunk wiring
Telephony card model
A2410
Largest A-series analog card listed here, supporting rollout plans up to 24 ports.
- Capacity tier
- Highest-density analog card
- Port ceiling
- Up to 24 analog ports
- Module type
- FXS400 / FXO400
- Deployment role
- Largest A-series build
Map requirements to a card
Use this matrix as the shortlist check. It separates capacity, module family, and installation facts so sales and engineering review the same configuration.
| Specification | A400 | A810 | A1610 | A2410 |
|---|---|---|---|---|
| Selection role | ||||
| Line-side use | FXS serves station devices. FXO receives PSTN or legacy PBX lines. Mixed sites need both counts mapped before model selection. | |||
| Port ceiling | Up to 4 analog ports | Up to 8 analog ports | Up to 16 analog ports | Up to 24 analog ports |
| Module type | FXS100 / FXO100 | FXS400 / FXO400 | FXS400 / FXO400 | FXS400 / FXO400 |
| Deployment role | Small server PBX | Branch analog expansion | Dense station or trunk wiring | Largest A-series analog build |
| Deployment checks | ||||
| Software stack | Asterisk and DAHDI run on the host server, so driver support and operating system fit must be checked early. | |||
| Server check | Verify slot type, card revision, power connector, and available server power before rollout. | |||
| Before rollout | Send the line map, capacity target, module mix, server details, and preferred model for review. | |||
Know when to choose Analog Cards
Analog Cards are designed for PBX servers that need internal FXS or FXO expansion. If the site needs an external SIP adapter, a standalone branch gateway, digital trunk access, or mixed-interface telephony, another OpenVox product family may be a better fit.
Internal PBX card deployment
- The PBX host can accept a PCI or PCIe telephony card.
- Copper wiring should terminate directly on the server.
- The team owns OS, Asterisk, and DAHDI planning.
External ATA deployment
- The site needs an Ethernet-connected adapter.
- Phones or fax devices need SIP account access.
- The site needs endpoint adaptation, not server card expansion.
Branch gateway deployment
- The site needs a standalone voice gateway.
- Analog voice is part of a broader access requirement.
- The buyer expects Ethernet, SIP, and standalone operation.
Digital or hybrid card deployment
- The trunk side is PRI, BRI, T1, E1, J1, SS7, or R2.
- The plan combines analog ports with digital spans.
- Card-based telephony is needed, but FXS/FXO alone is not enough.
Send the configuration details
Send the line map, port count, server slot, power lead, operating system, Asterisk and DAHDI versions, plus the preferred A-series model before rollout.