Regulatory compliance

FCC (Part 15 Class B), CE, ICES-003, A-Tick certification, Restriction of Hazardous Substances (RoHS), and UL

Power supply

DC input voltage: 5V DC at 2.0A maximum power consumption: 5W

Switching type (100-240V): Automatic

Power adapter: 100-240V and 50-60 Hz (26-34 VA) input with 1.8m cord

Indicator lights and LEDs

Phone 1, phone 2, network, Problem Report Tool (PRT), and power

Documentation

User Guide (online)

Administration Guide (online)

Regulatory Compliance and Safety Information guide (online)

Dimensions

(W x H x D)

3.98 x 3.98 x 1.10 in. (101 x 101 x 28mm)

Unit weight

5.40 oz (153 g)

Power

0.25 to 12W (idle to peak)

DC input voltage

5.0 VDC at 2.0A maximum

Power adapter

Universal AC/DC

~4.05 x 1.93 x 1.31 in. (~10.3 x 4.9 x 3.35 cm)

~4.23 oz (120 g) for the AC-input external power adapter

~4.9 ft (1.5 m) DC cord

6 ft (1.8 m) cord

UL/cUL, CE approved

Class I adapter

Operating temperature

32 to 113°F (0 to 45°C)

Nonoperating temperature

–13 to 158°F (–25 to 70°C)

Operating humidity

10% to 90% noncondensing

Storage humidity

10% to 90% noncondensing

Ethernet

One RJ-45 connector, IEEE 802.3 100BaseT standard

Analog phone

Two RJ-11 FXS voice ports

Power

5 VDC power connector

Tip/ring interfaces for each RJ-11 FXS port (SLIC)

Ring voltage

70VRMS (typical, balanced ringing only)

Ring frequency

20 Hz

Ring waveform

Trapezoidal with 1.2 to 1.6 crest factor

Ring load

1400 ohm + 40μF

Ringer equivalence number (REN)

Up to 3 REN per RJ-11 FXS port

Loop impedance

Up to 200 ohms (plus 430-ohm maximum phone DC resistance)

On-hook/off-hook characteristics

On-hook voltage (tip/ring)

–47V

Off-hook current

24 mA (nominal)

RJ-11 FXS port terminating impedance option

The ATA 191 provides multiple impedance, such as 600 ohm for American SKU, 900 ohm for European SKU, 220 ohm (820 ohm || 120nF) for Australian SKU, and so on.

Call progress tones

Configurable for two sets of frequencies and single set of on/off cadence

Dual-tone multifrequency (DTMF)

DTMF tone detection and generation

Fax

Fax pass-through and T.38 fax relay mode.

V34 fax is supported for pass-through mode. Success of fax transmissions up to 33.6 kb/s depends on network conditions, and fax modem/fax machine tolerance to those conditions. The network must have reasonably low network jitter, network delay, and packet-loss rate.

The ATA 191 only supports T38 Fax Relay Version 0 (G3).

Line-echo cancellation

• Echo canceler for each port

• 8 ms echo length

• Nonlinear echo suppression (ERL > 28 dB for frequency = 300 to 2400 Hz)

• Convergence time = 250 ms

• ERLE = 10 to 20 dB

• Double-talk detection

Out-of-band DTMF

RFC 2833 AVT tones for SIP

Configuration

• DHCP (RFC 2131)

• Web configuration via built-in web server

• Basic boot configuration (RFC 1350 TFTP Profiling)

• Dial plan configuration

• Cisco Discovery Protocol

Quality of Service

• Class-of-service (CoS) bit-tagging (802.1P)

• Type-of-service (ToS) bit-tagging

Security

Encryption for TFTP configuration files

Voice coder-decoders (codecs)

• G.729A, G.729AB

• G.711A-law

• G.711µ-law

Voice features

• Voice activity detection (VAD)

• Comfort noise generation (CNG)

• Dynamic jitter buffer (adaptive)

Voice-over-IP (VoIP) protocols

SIP (RFC 3261)