Analog Telephony Cards

A4 Series Analog Cards

A4 Series Analog Cards

The Sangoma A4 series analog telephony card supports from one (1) to four (4) ports for Asterisk, FreePBX and PBXact phone systems. Make up to 4 PSTN calls all on a single PCI or PCI Express slot.  The modular nature of the cards allows you to mix and match between FXO and FXS interfaces, giving you the exact port configuration you need.

The A4 series telephony card provides from 1-4 analog ports using single channel interface modules

With hardware echo cancellation options, compatibility with most commercial grade servers and Linux operating systems and with a lifetime warranty, customers trust in Sangoma to deliver value based telephony solutions.

Which type of module do I use?

FXS s110m

FXS modules for A4 cards
Each module supports one (1) FXS channel, and one (1) analog device such as an analog phone or tradition fax machine.

Single Channel Analog Modules

FXO modules for A4 card
Each module supports up to one (1) FXO channel, and one (1) PSTN trunk lines.​

Analog Card Applications

PSTN Trunking

PSTN Trunking

Use inside a server of your choice, powered by Linux/Windows, to create a SIP-TDM Gateway to allow IP-PBX to route calls to traditional PSTN.
SIP Trunking

SIP Trunking

Use inside a server of your choice, powered by Linux/Windows, to create a SIP-TDM Gateway with your  legacy analog based PBXs to replace expensive analog line connections with SIP trunking to allow reduced call costs, reduced line rental, and bring extra flexibility and disaster recovery.
VoIP Analog Fax Phone

Fax and Legacy Gateway

Use our Sangoma cards in your choice of hardware to connect legacy analog equipment like fax machines, door-bells or analog phones to your IP-based network.

Call Recording Icon

Call Recording

Monitor and record telephone conversations for lawful call interception. Use your choice of software, including Sangoma’s own TDM SDK dedicated for call tapping.

Analog Card Features

Scalable Icon

Configurable from 1 to 4 ports of FXO/FXS and mixed.

Highly Interoperable Icon
Highly Compatible

Plug and Play with FreePBX and PBXact phone systems and also compatible within most commercial grade servers and motherboards

Echo Cancellation Icon
Hardware Echo Cancellation

Optional 128ms Octasic DSP hardware echo cancellation for crystal clear audio.

Field Upgradable Icon
Field upgradable firmware

Upgrade firmware remotely

Warranty Icon

5 year warranty

Analog Card Specifications

Analog Card Specifications

Telephony Interface

PCI Interfaces

DSP Echo Canceller


Power Supply



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