Appendix C Cisco ATA Specifications

Physical Interfaces

Physical Interfaces

Table C-4 Physical Interfaces

Description

Specification

 

 

Ethernet

Two RJ-45, IEEE 802.3 10BASE-T standard

 

 

Analog telephone

Two RJ-11 FXS voice ports

 

 

Power

5 VDC power connector

 

 

Indicators

Function button with integrated status indicator

 

Link and 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 + 40 microF (per line)

 

 

 

 

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

25 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

 

 

 

 

 

 

 

 

 

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)

 

 

 

 

 

OL-3141-01

 

 

C-3

 

 

 

 

 

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Cisco Systems ATA 188, ATA 186 manual Physical Interfaces, Ringing Characteristics, Software Specifications
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ATA 188, ATA 186 specifications

The Cisco Systems ATA 186, or Analog Telephone Adapter, revolutionized the way traditional telephony interacted with Voice over Internet Protocol (VoIP) systems. Designed primarily for home and small office use, the ATA 186 allows users to connect standard analog phones and fax machines to a network, enabling them to take advantage of the benefits of VoIP technology.

One of the defining features of the ATA 186 is its dual port architecture. It includes two FXS ports, allowing users to connect up to two analog telephones. This functionality means that multiple devices can leverage VoIP services simultaneously without the need for separate adapters for each phone. The flexibility of the ATA 186 helps streamline the user experience, facilitating voice communication over an IP network while ensuring users can still use their existing phone equipment.

The ATA 186 employs various technologies to maintain high-quality voice calls. It supports standard voice codecs such as G.711 and G.729, which ensure efficient bandwidth usage while preserving call clarity. The adaptive jitter buffer technology further enhances call quality, compensating for network variations and minimizing latency, which is crucial for clear and uninterrupted conversations.

Additionally, the ATA 186 provides users with advanced calling features that were traditionally available only on PBX systems. These features include caller ID, call waiting, and voicemail functionality, integrating seamlessly with typical telephony services. The device also supports T.38 fax relay, allowing users to send and receive faxes over the internet, thus addressing the needs of environments where fax communication remains essential.

The security of VoIP conversations is also a priority for the ATA 186. It employs encryption protocols such as Secure Real-time Transport Protocol (SRTP) and Transport Layer Security (TLS), ensuring that voice data is securely transmitted across the network. This focus on security helps protect sensitive information transmitted during calls.

Installation and configuration of the ATA 186 is streamlined, with an intuitive web-based interface that simplifies the setup process. This accessibility makes it suitable for users with varying levels of technical expertise, as frequently required adjustments, such as network configurations and firmware updates, can be easily managed.

In conclusion, the Cisco Systems ATA 186 stands out as a versatile and robust solution for users looking to integrate analog phones into a VoIP environment. With its dual port capabilities, high-quality voice codecs, advanced call features, and security measures, it offers a compelling choice for both residential and commercial users seeking seamless telephony integration. As technology evolves, devices like the ATA 186 remain cornerstones in bridging traditional telephony with modern communication systems.
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