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POTS / TDM Replacement
Connect legacy equipment in PSTN and TDM replacement projects without replacing every analog endpoint at once.
Audiotrix C2 Technical Page
Compact 2 FXS SIP ATA for POTS Replacement
The Audiotrix C2 is a compact analog VoIP adapter that interconnects analog telephones, faxes and modems into SIP-based systems. It is designed for POTS/TDM replacement, cloud telephony, hosted unified communications, IP-Centrex, legacy PBX integration and secure branch deployments.
Audiotrix C2
2 FXS ANALOG VOIP ADAPTER
FXS 1
FXS 2
WAN
LAN 1
LAN 2
2 FXSAnalog phone, fax or modem
3 RJ-45WAN plus two LAN Ethernet ports
SIP/TLSSecure SIP connectivity
2 FXS ATAConnect analog telephones, fax machines, modems and legacy PBX equipment to SIP networks.
Fax & ModemSupports realtime T.38 fax and clear channel G.711 fax/modem pass-through.
Secure NetworkingEncrypted media, signaling and management with firewall, DoS protection and VPN options.
Mass DeploymentZero-touch provisioning, TR-069, Web GUI, SNMP and syslog for scalable operations.
Deployment use cases
A compact ATA for analog continuity and SIP modernization.
The Audiotrix C2 is positioned for organizations that need to preserve analog endpoints while migrating to SIP, cloud telephony and IP-based service delivery.
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Cloud Telephony SIP Termination
Provide SIP termination for cloud telephony services in branch offices, SMBs and distributed customer environments.
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Hosted UC & IP-Centrex
Convert analog signaling to SIP for hosted unified communications and IP-Centrex service environments.
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Legacy PBX Gateway
Use FXS ports, local call switching and user-defined call properties to integrate analog lines into existing PBX workflows.
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Fax & Modem Continuity
Support fax and modem transport over IP with realtime T.38 and G.711 pass-through capabilities.
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Secure Private Connectivity
Use VPN client/server capabilities with PPTP and L2TP for private corporate connectivity requirements.
How it works
Analog endpoint to SIP network in a compact edge adapter.
The C2 converts analog voice/fax/modem connectivity into SIP-based IP communication with local networking, routing, security and centralized management features.
1. Analog DevicePhone, fax, modem, alarm panel or PBX analog interface connects through FXS.
2. Audiotrix C2Digitizes, packetizes and routes analog communications to IP.
3. SIP SignalingUses SIP over UDP, TCP or TLS with RTP and SDP.
4. Secure IP NetworkFirewall, NAPT, QoS, VLAN/IP addressing and VPN support help control transport.
5. Cloud / PBX ServiceConnects to cloud telephony, IP-Centrex, hosted UC or legacy PBX migration infrastructure.
Integrated technical specifications
Audiotrix C2 technical details directly on the page.
No external datasheet is required for buyers to understand the C2’s ports, protocols, security, networking, voice, fax, management and environmental characteristics.
Voice / Media
- G.711 A-law and μ-law
- G.729a/b
- G.168 echo cancellation
- DTMF detection and generation
- Silence detection/suppression and comfort noise
- Configurable de-jitter buffer and packet length
IP Telephony Protocols
- SIP RFC 3261 over UDP, TCP and TLS
- RTP RFC 3550
- SDP RFC 4566
- Redundancy support via DNS SRV
- IPv4 and IPv6 dual stack
Analog Telephony
- 2 x RJ-11 FXS connectors
- Call forward, call transfer, conference call and call waiting
- Multiple country presets
- Customizable tones and ring patterns
- Message Waiting Indication via FSK
- On-hook/off-hook caller ID generation
Fax and Modem Support
- Realtime T.38 fax
- Clear channel G.711 fax pass-through
- Clear channel G.711 modem pass-through
- Designed for seamless transport of voice and data services over IP networks
Network Interfaces
- WAN: 1 x 10/100 Mbps Ethernet port
- LAN: 2 x 10/100 Mbps Ethernet ports
- Total physical Ethernet: 3 x 10/100 Base-T RJ-45 connectors
- Router-capable edge deployment
Networking Features
- IPv4 and IPv6
- DHCP client and DHCP server
- PPPoE RFC 2516
- QoS traffic shaping
- Firewall and static routing
- NAPT
- Multiple IP addresses and VLANs
Security
- Encrypted media, signaling and management
- Deep packet inspection firewall
- DoS protection
- VPN client/server capabilities
- VPN support: PPTP and L2TP
Management
- Zero-touch provisioning
- TR-069 for centralized management
- Intuitive Web GUI
- TELNET and SNMP
- Scripts and firmware files
- Syslog and log file support
- Customizable factory settings
Power and Environment
- External 100–240 VAC power supply
- Operating temperature: 0°C to 50°C
- Storage temperature: -25°C to 85°C
- Humidity: up to 85%, non-condensing
Dimensions
- Height: approximately 3.2 cm
- Width: approximately 8.0 cm
- Depth: approximately 12.0 cm
- Weight: 120 g
FAQ
Audiotrix C2 questions buyers search for.
Structured answers improve SEO relevance for analog VoIP adapter, 2 FXS ATA, POTS replacement, SIP, fax over IP and cloud telephony searches.
What is the Audiotrix C2?
The Audiotrix C2 is a compact 2 FXS analog VoIP adapter that connects analog telephones, fax machines and modems to SIP-based IP networks.
Does Audiotrix C2 support POTS replacement?
Yes. It is designed for PSTN/TDM replacement projects where analog endpoints need to remain in service while connecting to modern SIP telephony.
Does the C2 support fax and modem over IP?
Yes. It supports realtime T.38 fax and clear channel G.711 fax/modem pass-through.
Can the C2 be managed at scale?
Yes. The C2 supports zero-touch provisioning, TR-069, Web GUI, SNMP, syslog and firmware/script-based management.
Secure request
Plan your analog-to-SIP migration with Audiotrix C2.
Use this request form for POTS replacement, legacy PBX connectivity, fax/modem continuity, cloud telephony, hosted UC and branch-office analog modernization projects.