Cisco ATA191-K9 2-Port Analog Telephone Adapter — 2x FXS, 10/100 Ethernet, Unified CM, Refurbished
Warranty: Lifetime
Puts two analog lines — fax, door phones, overhead paging — onto Cisco Unified CM
Cisco ATA191-K9 — ATA 191 analog telephone adapter, 2x FXS, 1x 10/100 Ethernet
→ ATA191-K9 is the Cisco call-control version. It registers to Unified CM or Unified CME. For Webex Calling, BroadWorks or other third-party SIP platforms, the multiplatform part is ATA191-3PW-K9.
Part Number: ATA191-K9
SKU: ATA191-K9-R
Description: Cisco ATA 191 analog telephone adapter, 2 FXS ports, 1 Ethernet port
The ATA 191 connects two analog devices to an IP voice network. Each FXS port registers separately, so one adapter can carry a fax machine and an analog phone, or two paging zones.
Cisco supports real-time fax over IP with T.38 relay and G.711 pass-through, and up to 3 REN ringer load per port.
Which One Do I Need?
| Your call control | Part |
|---|---|
| Cisco Unified CM or Unified CME | ATA191-K9 — this listing |
| Webex Calling, BroadWorks or other third-party SIP | ATA191-3PW-K9 (multiplatform) |
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | ATA191-K9 |
| Interfaces | 2x RJ11 FXS, 1x 10/100 Mbps RJ-45 Ethernet |
| Codecs | G.711 a-law and mu-law, G.729a, G.729ab |
| Fax | T.38 fax relay (Group 3), G.711 fax pass-through |
| Ringer load | Up to 3 REN |
| Security | SIP over TLS 1.1 and 1.2, SRTP, HTTPS, SSH, secure boot |
| Power | 5V DC external adapter, 100 to 240V AC; 5W |
| Dimensions (H x W x D) | 3.9 x 3.9 x 1.1 in (100 x 100 x 28 mm) |
| Weight | 4.7 oz (132.1 g) |
| Mounting | Wall mountable |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco ATA 191 data sheet.
Good to Know
- Licensing. Unified CM counts each FXS port as an endpoint; plan the licenses.
- Power adapter. The ATA runs from an external 5V adapter, not PoE. Confirm one is included with your unit when you order.
- Analog, not ISDN. FXS ports drive analog phones, fax machines and paging, not digital handsets.
Quick Checklist — Is This the Right Adapter?
You run Cisco Unified CM or CME. You need to connect one or two analog devices such as a fax, door phone or paging amplifier.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Need several, or a matching set? Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- Cisco IP Phone 8841 (CP-8841-K9) — IP desk phone on the same system
- Cisco ISR4321/K9 — voice gateway router
Related Guides
Puts two analog lines — fax, door phones, overhead paging — onto Cisco Unified CM
Cisco ATA191-K9 — ATA 191 analog telephone adapter, 2x FXS, 1x 10/100 Ethernet
→ ATA191-K9 is the Cisco call-control version. It registers to Unified CM or Unified CME. For Webex Calling, BroadWorks or other third-party SIP platforms, the multiplatform part is ATA191-3PW-K9.
Part Number: ATA191-K9
SKU: ATA191-K9-R
Description: Cisco ATA 191 analog telephone adapter, 2 FXS ports, 1 Ethernet port
The ATA 191 connects two analog devices to an IP voice network. Each FXS port registers separately, so one adapter can carry a fax machine and an analog phone, or two paging zones.
Cisco supports real-time fax over IP with T.38 relay and G.711 pass-through, and up to 3 REN ringer load per port.
Which One Do I Need?
| Your call control | Part |
|---|---|
| Cisco Unified CM or Unified CME | ATA191-K9 — this listing |
| Webex Calling, BroadWorks or other third-party SIP | ATA191-3PW-K9 (multiplatform) |
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | ATA191-K9 |
| Interfaces | 2x RJ11 FXS, 1x 10/100 Mbps RJ-45 Ethernet |
| Codecs | G.711 a-law and mu-law, G.729a, G.729ab |
| Fax | T.38 fax relay (Group 3), G.711 fax pass-through |
| Ringer load | Up to 3 REN |
| Security | SIP over TLS 1.1 and 1.2, SRTP, HTTPS, SSH, secure boot |
| Power | 5V DC external adapter, 100 to 240V AC; 5W |
| Dimensions (H x W x D) | 3.9 x 3.9 x 1.1 in (100 x 100 x 28 mm) |
| Weight | 4.7 oz (132.1 g) |
| Mounting | Wall mountable |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco ATA 191 data sheet.
Good to Know
- Licensing. Unified CM counts each FXS port as an endpoint; plan the licenses.
- Power adapter. The ATA runs from an external 5V adapter, not PoE. Confirm one is included with your unit when you order.
- Analog, not ISDN. FXS ports drive analog phones, fax machines and paging, not digital handsets.
Quick Checklist — Is This the Right Adapter?
You run Cisco Unified CM or CME. You need to connect one or two analog devices such as a fax, door phone or paging amplifier.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Need several, or a matching set? Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- Cisco IP Phone 8841 (CP-8841-K9) — IP desk phone on the same system
- Cisco ISR4321/K9 — voice gateway router