# Analogue Telephone Adapter Cisco ATA 191, 2-port handset-to-Ethernet, SIP, G.711/G.726/G.729, T.38 fax

**URL:** https://aio.lv/en/product--cisco-ata191-3pw-k9--3097652
**Data updated:** 2026-04-02 14:24 (EEST)
**Category:** VoIP Gateways
**Manufacturer:** Cisco
**Manufacturer code:** ATA191-3PW-K9
**EAN:** 0889728031622
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Cisco ATA 191 is a 2-port analogue telephone adapter that connects traditional handsets to IP networks via Ethernet. It supports SIP signaling, voice codecs G.711μ/a, G.726, G.729A/ab and T.38 fax relay. Network protocols include TCP/UDP/RTP/HTTP/ARP/RTCP/ICMP/LLDP and management via SNMPv3. Security features include AES, HTTPS and SSH. Compact unit (100×100×28 mm, 132.1 g) with 1-year limited hardware warranty.

## Long description

The Cisco ATA 191 is a compact 2-port analogue telephone adapter that connects traditional handsets, fax machines and paging devices to IP networks via an Ethernet interface. The unit supports SIP signalling and common voice codecs — G.711μ/a, G.726 and G.729A/ab — plus T.38 fax relay for reliable fax transmission over packet networks. Designed for small offices, branch locations and cloud-based UC deployments, the adapter provides secure management and interoperable network protocol support while preserving existing analogue equipment investments.
Advantages
The adapter delivers a small form factor and low power footprint while offering enterprise-grade security with AES encryption, HTTPS and SSH management. It supports a broad set of network protocols including TCP/UDP/RTP/HTTP/ARP/RTCP/ICMP/LLDP and can be managed via SNMPv3 for integration into monitoring systems. T.38 fax relay and multiple voice codecs ensure compatibility with legacy terminals and modern SIP-based PBX or UCaaS services. The device includes a manufacturer-limited 1-year hardware warranty and is suitable for environments where straightforward migration from analogue to IP telephony is required.
Suitable for
 Connecting traditional desk phones to a SIP-based VoIP network
 Enabling fax machines to operate over IP using T.38 relay
 Small office or branch deployments with limited space
 Integrating analogue paging systems into an IP audio environment
Key specifications
 Ports: 2 analogue FXS ports and 1 Ethernet 10/100 Mbps port
 Signalling: SIP
 Supported codecs: G.711μ/a, G.726, G.729A/ab
 Fax support: T.38 fax relay
 Network protocols: TCP, UDP, RTP, HTTP, ARP, RTCP, ICMP, LLDP
 Management: SNMPv3, HTTPS, SSH
 Security: AES encryption support for secure voice and management
 Physical dimensions: 100 × 100 × 28 mm; weight: 132.1 g
 Power: low-power compact design (external power adapter)
 Warranty: 1-year limited hardware warranty
How to use
Connect analogue handsets or a fax machine to the adapter's FXS ports and attach the Ethernet port to your network switch or router. Configure SIP account settings on the device web interface or via your SIP provider/UCaaS control panel. Verify codec and fax settings (enable T.38 if required) and confirm network parameters such as DHCP or static IP, DNS and gateway. Use SNMPv3 or the HTTPS/SSH management interfaces for integration into existing monitoring or configuration workflows. After provisioning, test voice calls and fax transmissions to confirm interoperability with your SIP infrastructure.
Usage recommendations
For reliable voice and fax performance, place the adapter on a stable network segment with sufficient bandwidth and QoS enabled for voice traffic. Ensure the SIP server and any NAT traversal settings are configured correctly; enable T.38 on both the adapter and your SIP infrastructure when using fax machines. Keep device firmware up to date and restrict management access to trusted hosts or management VLANs using HTTPS, SSH and SNMPv3 to maintain security.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 100 x 100 x 28 |
| Weight | 0.1321 kg |
| Certification | CE Markings per directives 2014/30/EU and 2014/35/EU |
| Security algorithms | AES, HTTPS, SSH |
| Management protocols | SNMPv3 |
| Supported network protocols | TCP, UDP, RTP, HTTP, ARP, RTCP, ICMP, LLDP |
| Safety | UL 60950 Second Edition, CAN/CSA-C22.2 No. 60950 Second Edition, IEC 60950-1:2005 (Second Edition) + A1:2009 + A2:2013 and/or AS/NZS 60950.1:2015 |
| Operating relative humidity (H-H) | 10 - 90 |
| Storage temperature (T-T) | -10 - 60 |
| Package weight | 498.87 g |
| Operating temperature (T-T) | 0 - 40 |
| Storage relative humidity (H-H) | 10 - 95 |
| LED indicators | Y |
| Conference call | Yes |
| Voice codecs | G.729A, G.729ab, G.726, G.711Mu, G.711a |
| VoIP protocols | SIP |
| Fax compatibility | T.38 |
| Modem (RJ-11) ports | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| Noise reduction | Yes |
| Caller ID | Yes |
| Call waiting | Yes |
| Quality of Service (QoS) support | Yes |
| Country of origin | China |
| Web-based management | Yes |
| Power LED | Yes |
| DHCP client | Yes |
| Reset button | Yes |
| Package depth | 245.11 mm |
| Package height | 64.008 mm |
| Package width | 153.924 mm |
| DMZ support | Yes |
| Quantity per pack | 1 pc(s) |
| Harmonized System (HS) code | 85177900 |

## FAQ

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Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Cisco products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Cisco service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Cisco ATA 191 analogue telephone adapter?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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