• Cisco ATA191-K9 black router with green accents and ventilation slits
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Cisco

Cisco ATA191-K9 | 2-Port FXS Analog Telephone Adapter, SIP, T.38 Fax

ATA191-K9

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Description

The Cisco ATA191-K9 2-Port Analog Telephone Adapter converts traditional analog phones, fax machines, and paging systems into IP-enabled devices for seamless VoIP integration. Featuring two independent FXS ports with SIP registration support, this compact adapter delivers enterprise-grade voice quality with G.711, G.729, and G.722 wideband codec support. Ideal for small offices, branch locations, and businesses transitioning to unified communications while protecting existing analog infrastructure investments.

Features

Dual independent FXS ports with separate SIP registrations
- Advanced voice preprocessing and high-performance echo cancellation
- Voice Activity Detection (VAD) and Comfort Noise Generation (CNG)
- Comprehensive codec support: G.711, G.729a/ab, G.722 wideband, G.726
- T.38 fax relay and pass-through for reliable fax-over-IP
- TLS and SRTP encryption for secure voice and signaling
- IEEE 802.1p/Q QoS and VLAN tagging support
- IPv4/IPv6 dual-stack networking capability
- DHCP and static IP addressing support
- Web-based management interface for easy configuration
- Central provisioning via Cisco Unified Communications Manager
- Remote provisioning support (TR-069, XML)
- Dedicated PRT button for problem reporting and log collection
- Wall-mountable and desktop form factor options
- Compact, fanless design for quiet operation

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

2x RJ-11 FXS ports for analog devices (phones, fax, paging)
- 1x 10/100 Mbps RJ-45 Ethernet port
- SIP protocol support with independent port registration
- Voice codecs: G.711, G.729a/ab, G.722 (wideband), G.726
- T.38 fax relay and fax pass-through support
- Security: TLS signaling encryption, SRTP media encryption
- QoS: IEEE 802.1p/Q (VLAN tagging and prioritization)
- Management: Web-based GUI, remote provisioning, TR-069
- Power: External 5V DC adapter (included), 5W consumption
- Dimensions: 3.9 x 3.9 x 1.0 in (H x W x D)
- Weight: 0.22 lbs (0.1 kg)
- Operating temperature: 0°C to 40°C (32°F to 104°F)
- Compliance: FCC Part 15 Class B, EN 55032, CISPR 32

FAQs

Q: What analog devices can I connect to the ATA191-K9?
A: The ATA191-K9 supports up to two analog devices including traditional telephones, fax machines, modems, and overhead paging systems via its two RJ-11 FXS ports. Each port can be configured independently with separate SIP registrations for flexible deployment scenarios.

Q: Does the ATA191-K9 support fax over IP?
A: Yes, the adapter fully supports fax over IP using T.38 fax relay protocol and fax pass-through modes, ensuring reliable fax transmission over VoIP networks while maintaining compatibility with traditional fax machines.

Q: Is the ATA191-K9 compatible with third-party VoIP platforms?
A: The ATA191-K9 is designed specifically for Cisco call control systems including Cisco Unified Communications Manager. It uses standard SIP protocol but is optimized for Cisco environments and may have limited compatibility with third-party hosted VoIP providers.

Q: What voice quality features does the ATA191-K9 provide?
A: The adapter delivers HD voice quality through support for G.722 wideband codec, advanced echo cancellation, Voice Activity Detection (VAD), Comfort Noise Generation (CNG), and comprehensive QoS capabilities with 802.1p/Q VLAN tagging and traffic prioritization.

Q: How is the ATA191-K9 powered and configured?
A: The device requires an external 5V DC power adapter (included) and consumes only 5W. It features web-based configuration, central provisioning via Cisco Unified Communications Manager, and supports remote management through TR-069 and XML-based provisioning for simplified mass deployment.

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