Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP, Version 1.0

Dimensions

1.5 x 5.4 x 6.7 in. (3.8 x 13.7 x 17.0 cm) (H x W x D)

Weight

9.2 oz (260 g)

Power

0.25 to 12W (idle to peak)

DC input voltage

+12.0 VDC at 1.0A maximum

Power adaptor

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 adaptor

~4.9 ft (1.5 m) DC cord

6 ft (1.8 m) cord

UL/cUL, CE approved

Class I adaptor

Operating temperature

23 to 113×F (-5 to 45×C)

Non-operating temperature

-13 to 158×F (-25 to 70×C)

Relative humidity

5 to 95% noncondensing

Ethernet

One RJ-45 connector, IEEE 802.3 100BaseT standard

Analog phone

Two RJ-11 FXS voice ports

Power

12 VDC power connector

Power switch

Power switch to turn the ATA 187 on or off

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

Ring voltage

40VRMS (typical, balanced ringing only)

Ring frequency

20 Hz

Ring waveform

Trapezoidal with 1.2 to 1.6 crest factor

Ring load

1400 ohm + 40mF

Ringer equivalence number (REN)

Up to 5 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)

-48V

Off-hook current

24 mA (nominal)

RJ-11 FXS port terminating impedance option

The ATA 187-I1 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.

Enhanced fax pass-through is supported on the Cisco ATA. Success of fax transmissions up to 14.4 kbps 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.

Line-echo cancellation

•Echo canceller 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

Note Cannot transmit RFC 2833 and in-band signalling, simultaneously.

Configuration

•DHCP (RFC 2131)

•Web configuration via built-in Web server

•Touch-tone phone keypad configuration with voice prompt

•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

Note Does not support CoS service.

Security

RC4 encryption for TFTP configuration files

Voice coder-decoders (codecs)

•G.729, 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 bis)