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Small white rectangular box with one RJ-45 port and two RJ-11 ports

Cisco Systems, Inc.

Cisco Systems, Inc. ATA191-K9 2-Port Analog Telephone Adapter telephone accessory

SKU CH-ES8T-3Z45E MPN ATA191-K9

Converts analog phones or fax machines to VoIP using two FXS ports and a single Fast Ethernet connection

  • DetailsInterfaces/Ports PoE (RJ-45) Port: No USB: No Management Por
  • Connect analog phones to VoIP networks with two FXS ports
  • Single Fast Ethernet port links the adapter to your LAN
  • Wall-mountable design saves desk space in tight installations
  • Compact 3.90-inch square footprint fits discreetly on any surface
  • Lightweight 133.2 g build simplifies mounting and repositioning

Two-Port Analog Adapter

The Cisco ATA191-K9 converts analogue voice signals for transport over an IP network. It provides two FXS ports so legacy phones or fax machines can join a VoIP system without replacement.

Suits analogue endpoints.

Offices keeping existing handsets or fax hardware gain a simple migration path with two RJ-11 ports and a single Fast Ethernet uplink. Buyers who need Power over Ethernet, Gigabit speeds or a management console should look at other models.

One Fast Ethernet uplink

The single 10/100Base-T RJ-45 port limits total throughput to 100 Mbps and supplies no PoE power, so the adapter must be powered separately and cannot serve high-bandwidth or PoE-dependent deployments.

How it compares

Measured against everything we stock in Headsets, Cords & Phone Mounts, at today’s prices. Recalculated every night.

Price $221.99
Pricier than about 90% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameCisco Systems, Inc
Model name2-Port Analog Telephone Adapter
Part numberATA191-K9
Size & build
Shipping weight0.57 kg
Package size311 × 260 × 198 mm

Questions about this item

How do I install the ATA191-K9 and which step do people often miss?

Connect the single RJ-45 network port to a Fast Ethernet switch, then plug up to two analog devices into the FXS RJ-11 ports. The step often missed is configuring the adapter through the web interface before expecting dial tone.

What maintenance or replacement will the ATA191-K9 need over time?

The unit has no internal battery or user-replaceable parts. Maintenance is limited to firmware updates via the management interface and replacing the external power supply if it fails.

What limit appears first when the ATA191-K9 runs under sustained load?

The Fast Ethernet uplink caps total throughput at 100 Mbps, so simultaneous heavy voice traffic on both FXS ports will hit that bandwidth ceiling before any other resource.

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