Table Of Contents

Cisco ATA Specifications

Physical Specifications

Electrical Specifications

Environmental Specifications

Physical Interfaces

Ringing Characteristics

Software Specifications

Cisco ATA Specifications

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This section describes Cisco ATA specifications:

• Physical Specifications

• Electrical Specifications

• Environmental Specifications

• Physical Interfaces

• Ringing Characteristics

• Software Specifications

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Note The term Cisco ATA refers to both the Cisco ATA 186 and the Cisco ATA 188, unless otherwise stated.

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Physical Specifications

Table C-1 Physical Specifications

Description	Specification
Dimensions	1.5 x 6.5 x 5.75 in. (3.8 x 16.5 x 14.6 cm) (H x W x D)
Weight	15 oz (425 g)

Electrical Specifications

Table C-2 Electrical Specifications

Description	Specification
Power	0.25 to 7.5W (idle to peak)
DC input voltage	+5.0 VDC at 1.5A maximum
Power adaptor	Universal AC/DC ~3.3 x 2.0 x 1.3 in. (~8.5 x 5.0 x 3.2 cm) ~4.8 oz (135 g) for the AC-input external power adaptor ~4 ft (1.2 m) DC cord 6 ft (1.8 m) cord UL/CUL, CE approved Class II transformer

Environmental Specifications

Table C-3 Environmental Specifications

Description	Specification
Operating temperature	41 to 104×F (5 to 40×C)
Storage temperature	-4 to 140×F (-20 to 65×C)
Relative humidity	10 to 90% noncondensing, operating, and nonoperating/storage

Physical Interfaces

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

Ringing Characteristics

Table C-5 Ringing Characteristics

Description	Specification
Tip/ring interfaces for each RJ-11 FXS port (SLIC)
Ring voltage	40VRMS (typical, balanced ringing only)
Ring frequency	25 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 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.

Software Specifications

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
Fax	G.711 fax pass-through and G.711 fax 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	•H.245 out-of-band DTMF for H.323 •RFC 2833 AVT tones for SIP, MGCP, SCCP
Configuration	•DHCP (RFC 2131) •Web configuration via built-in Web server •Touch-tone telephone 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
Security	•H.235 for H.323 •RC4 encryption for TFTP configuration files
Voice coder-decoders (codecs)	Note In simultaneous dual-port operation, the second port is limited to G.711 when using G.729. •G.723.1 •G.729, G.729A, G.729AB •G.723.1 •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	•H.323 v2 •SIP (RFC 2543 bis) •MGCP 1.0 (RFC 2705) •MGCP 1.0/network-based call signalling (NCS) 1.0 profile •MGCP 0.1 •SCCP

Posted: Fri Apr 2 12:51:29 PST 2004
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