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FXO/FXS Analog VoIP Gateways

An FXS gateway connects analog phones and fax machines to a VoIP phone system; an FXO gateway connects analog telephone lines (PSTN) to a VoIP system. 3G Callnet supplies Dinstar, Synway and Sangoma analog gateways from 1 to 112 ports.

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FXO/FXS Analog VoIP Gateways

FXO vs FXS at a glance

FXS gatewayFXO gateway
ConnectsAnalog phones, fax machines, old PBX extensionsAnalog telephone lines (PSTN) or PBX trunk ports
ProvidesDial tone and ringing to the deviceA line for the VoIP system to dial out and receive calls
Typical useKeep existing handsets on a new IP-PBXUse existing landlines with a VoIP system; failover

Full explanation: FXO vs FXS – what’s the difference?

Ranges we supply

  • Dinstar – DAG series analog gateways from 1–2 FXS ports up to 112 FXS ports, with T.38 fax and flexible dial plans.
  • Synway – SMG1000 series, 2–32 FXS/FXO ports.
  • Sangoma – Vega series FXS, FXO and mixed gateways, 4 to 50 ports.

Pair a gateway with an IP-PBX, or compare all products in the Product Finder.

Dinstar FXO/FXS Gateways View page

Dinstar DAG1000-1/2S
Dinstar · Fxo/Fxs Gateway

DAG1000-1/2S

DAG1000-1S/2S is a multi-functional analog telephone adapter which offers seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. The device provides 1 or 2 FXS port(s), fax over IP and a built-in high-speed NAT router. These powerful features and good voice quality make the device ideal for various application environments such as SOHO and small enterprises and for personal use. Moreover, with automatic provisioning and centralized management system, the device is easy to maintain and deploy.

Features:

  • 1/2 FXS ports, 1 WAN, 1 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG1000-4S
Dinstar · Fxo/Fxs Gateway

DAG1000-4S

DAG1000-4S is a multi-functional analog telephone adapter which offers seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. With standard SIP protocol, it’s compatible with leading IMS/NGN platforms and SIP-based IP Phone systems. It provides 4 FXS ports, fax over IP and flexible dial plans. Offering high-quality and reliable voice-over-IP service, the device is ideal for call centers, small and medium enterprises, SOHO and residential users.

Features:

  • 4 FXS ports, 1 WAN, 1 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG1000-8S
Dinstar · Fxo/Fxs Gateway

DAG1000-8S

DAG1000-8S is a multi-functional Analog VoIP Gateway offering seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. The device offers 8 FXS ports, fax over IP and flexible dial plans. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Features:

  • 8 FXS ports, 1 WAN, 3 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG2000-16S
Dinstar · Fxo/Fxs Gateway

DAG2000-16S

DAG2000-16S is a multi-functional analog gateway offering seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. With the standard SIP protocol, it’s compatible with leading IMS/NGN platforms and SIP-based IP Phone systems. The device offers 16 FXS ports, fax over IP and flexible dial plans. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Features:

  • 16 FXS ports, 4 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG2000-24/32S
Dinstar · Fxo/Fxs Gateway

DAG2000-24/32S

DAG2000-24/32S is a multi-functional analog gateway offering seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. With the standard RJ11 and RJ21 interfaces, the device offers maximum 32 FXS ports. It provides the standard SIP protocol and is compatible with leading IMS/NGN platforms and SIP-based IP Phone systems. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Features:

  • 24/32 FXS ports, 4 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG2500-48/64/72S
Dinstar · Fxo/Fxs Gateway

DAG2500-48/64/72S

DAG2500 is a functional analog gateway offering seamless connectivity between VoIP and traditional phone system. It’s a highly-integrated gateway which provides up to 72 FXS ports with standard R21 interface in 1U size. Users can easily connect their analog phones, fax machines and PBX systems via standard voice interface. DAG2500 supports the standard SIP protocol and it’s compatible with leading IMS/NGN platform and SIP-based IP Phone system. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Features:

  • 48/64/72 FXS ports, 2 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Dinstar DAG3000-112S
Dinstar · Fxo/Fxs Gateway

DAG3000-112S

DAG3000 is a multi-functional analog gateway offering seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. It adopts modularized hardware design that allows to expand FXS ports by adding boards according to user’s requirements. Each board has 8 FXS ports and the gateway supports 112 FXS ports at maximum. DAG3000 supports the standard SIP protocol and it’s compatible with leading IMS/NGN platforms and SIP-based IP Phone systems. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Features:

  • 112 FXS ports, 4 LAN
  • Support SIP, IMS
  • T.38 Fax
  • Flexible routing & Dial plan
  • Interoperable with leading softswitches, IP-PBXs and SIP servers
Get a Quote Dinstar page
Synway Fxo/Fxs Gateway

Synway FXO/FXS Gateways View page

Synway SMG1000 FXS/FXO Gateway
Synway · Fxo/Fxs Gateway

SMG1000 FXS/FXO Gateway

SMG1000 Analog Gateway allows for a well-planned, phased migration to an IP network, making the gateways an easy solution for enterprises looking to enhance their legacy PBX equipment with new VoIP access and applications. Connected between a PBX or a LAN, the SMG1000 Gateway converts analog PSTN messages into a format suitable for transmission over standard IP networks.

Features:

  • Support 2~32FXS/FXO Ports, Field Approved Globally
  • Superior Voice Quality by Designated DSP Chipsets
  • User-Friendliness and Web-based Administration
Get a Quote Synway page
Sangoma Fxo/Fxs Gateway

Sangoma FXO/FXS Gateways View page

Sangoma Vega 60 FXS
Sangoma · Fxo/Fxs Gateway

Vega 60 FXS

Sangoma’s Vega 60 FXS VoIP Analog Gateways are available in a 4-port or 8-port analog FXS appliance supporting up to 8 simultaneous calls

Features:

  • Supports SIP, T.38 fax and modems
  • WebGUI for configuration and troubleshooting, featuring Quick Wizard for rapid deployment
  • Built-in DSP for media translation
  • Automated Configuration with TR-069
  • Interoperable with most legacy and VoIP carriers worldwide
  • Advanced flexible call routing with automatic failover and bypass routing
Get a Quote Sangoma page
Sangoma Vega 60 FXO
Sangoma · Fxo/Fxs Gateway

Vega 60 FXO

Sangoma’s Vega 60 FXO VoIP Analog Gateways are available in a 4-port or 8-port analog FXO appliance supporting up to 8 simultaneous calls

Features:

  • Supports SIP, T.38 fax and modems
  • WebGUI for configuration and troubleshooting, featuring Quick Wizard for rapid deployment
  • Built-in DSP for media translation
  • Automated Configuration with TR-069
  • Interoperable with most legacy and VoIP carriers worldwide
  • Advanced flexible call routing with automatic failover and bypass routing
Get a Quote Sangoma page
Sangoma Vega 60 FXO & FXS
Sangoma · Fxo/Fxs Gateway

Vega 60 FXO & FXS

Sangoma’s Vega 60G FXO & FXS VoIP Analog Gateways are available in a 4-port FXO and 4-port FXS analog appliance supporting up to 8 simultaneous calls

  • Supports SIP, T.38 fax and modems
  • WebGUI for configuration and troubleshooting, featuring Quick Wizard for rapid deployment
  • Built-in DSP for media translation
  • Automated Configuration with TR-069
  • Interoperable with most legacy and VoIP carriers worldwide
  • Advanced flexible call routing with automatic failover and bypass routing
Get a Quote Sangoma page
Sangoma Vega 3000G
Sangoma · Fxo/Fxs Gateway

Vega 3000G

Sangoma’s Vega 3000G VoIP Analog Gateways are a 24 FXS analog appliance supporting up to 24 simultaneous calls

  • Supports SIP, T.38 fax and modems
  • WebGUI for configuration and troubleshooting, featuring Quick Wizard for rapid deployment
  • Built-in DSP for media translation
  • Interoperable with most legacy and VoIP carriers worldwide
  • Advanced flexible call routing with automatic failover and bypass routing
  • 8 km loop length, great for muti-dwelling applications
Get a Quote Sangoma page
Sangoma Vega 3050G
Sangoma · Fxo/Fxs Gateway

Vega 3050G

Sangoma’s Vega 3050G VoIP Analog Gateways are a 50 FXS appliance supporting up to 50 simultaneous calls.

  • Supports SIP, T.38 fax and modems
  • WebGUI for configuration and troubleshooting, featuring Quick Wizard for rapid deployment
  • Built-in DSP for media translation
  • Interoperable with most legacy and VoIP carriers worldwide
  • Advanced flexible call routing with automatic failover and bypass routing
  • Optional expansion board for up to 2 FXO ports for emergency PSTN connectivity
Get a Quote Sangoma page
Sangoma Vega 4×4
Sangoma · Fxo/Fxs Gateway

Vega 4×4

Sangoma’s Vega 4 x 4 connects analog private wires, audio sources and the PSTN to SIP networks for up to 16 calls.

  • Supports four analog interfaces: Audio, GenGen, FXO, FXS
  • Web GUI for configuration and troubleshooting
  • Supports SIP, T.38 fax and modems
  • Supports up to 16 analog ports on 16 physical interfaces
  • Ideal for private wire or point-to-point application
  • Chassis designed to be built out by systems integrator or OEM to individual requirements
Get a Quote Sangoma page

Frequently asked questions

What is the difference between FXO and FXS?

FXS (Foreign Exchange Subscriber) ports supply dial tone and ringing power to analog phones and fax machines. FXO (Foreign Exchange Office) ports plug into an analog line from the telephone exchange or an old PBX. Use FXS to keep analog handsets on an IP-PBX; use FXO to bring analog lines into it.

How many ports do I need?

One FXS port per analog phone or fax machine, and one FXO port per analog line. Models range from 1–2 ports (small offices) to 32, 72 and 112 ports (large sites and hotels).

Can an FXO gateway act as backup if the internet fails?

Yes. FXO lines give the phone system a PSTN path, which keeps calls running when internet or SIP service is down.

Do these gateways work with Asterisk, FreePBX and other SIP servers?

Yes. They use the standard SIP protocol and are interoperable with leading IP-PBXs, softswitches and SIP servers.

Need a call center dialer, IVR, IP-PBX or VoIP hardware? Tell us what you need and get a quote from 3G Callnet, Mohali.

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