Cisco ATA 186 Administrator's Guide

C-3
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Appendix C Cisco ATA Specifications
Physical Interfaces
Physical Interfaces
Ringing Characteristics
Software Specifications
Table C-4 Physical Interfaces
Description Specification
Ethernet Two RJ-45 connectors, IEEE 802.3 10BaseT standard
Analog telephone Two RJ-11 FXS voice ports
Power 5 VDC power connector
Indicators Function button with integrated status indicator
Activity LED indicating network activity
Table C-5 Ringing Characteristics
Description Specification
Tip/ring interfaces for each RJ-11 FXS port (SLIC)
Ring voltage 40V
RMS
(typical, balanced ringing only)
Ring frequency 25 Hz
Ring waveform Trapezoidal with 1.2 to 1.6 crest factor
Ring load 1400 ohm + 40µF
Ringer equivalence number (REN) Up to 5 REN per RJ-11 FXS port
Loop impedance Up to 200 ohms (plus 430-ohm maximum telephone
DC resistance)
On-hook/off-hook characteristics
On-hook voltage (tip/ring) –50V
Off-hook current 27 mA (nominal)
RJ-11 FXS port terminating impedance option The Cisco ATA186-I1 and Cisco ATA188-I1 provide
600-ohm resistive impedance. The Cisco ATA186-I2
and Cisco ATA188-I2 provide 270 ohm + 750 ohm //
150-nF complex impedance.
Table C-6 Software Specifications (All Protocols)
Description Specification
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

Cisco ATA 186 Specifications

General

Operating Temperature	32°F to 104°F (0°C to 40°C)
Protocol	SIP, H.323
Network Interface	10/100BASE-T Ethernet
Audio Codec Support	G.729a, G.723.1
Power Supply	5V DC
Weight	0.23 kg (0.5 lb)
Relative Humidity	10 to 90% noncondensing
Ports	2 RJ-11 FXS ports