Appendix C Cisco ATA Specifications

Software Specifications

Table C-6 Software Specifications (All Protocols) (continued)

Description

Specification

 

 

 

 

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

 

 

 

 

 

 

 

 

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)

 

C-4

OL-4008-01

 

 

 

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Cisco Systems ATA 188 manual Appendix C Cisco ATA Specifications Software Specifications
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ATA 188 specifications

The Cisco Systems ATA 188 is a versatile Analog Telephone Adapter designed to facilitate the integration of traditional telephone systems with Voice over Internet Protocol (VoIP) networks. This device has been key in bridging the gap between legacy telephony and modern IP-based communication, allowing users to leverage their existing analog phones while enjoying the benefits of digital connectivity.

One of the main features of the ATA 188 is its ability to connect regular analog phones to a VoIP network, enabling users to make and receive calls over the internet. This significantly reduces calling costs, especially for long-distance and international calls. The ATA 188 supports two phone lines, allowing simultaneous voice calls. This dual-line capability makes it a suitable choice for small businesses or home offices that require multiple lines without the need for extensive infrastructure.

The device is equipped with various technologies that enhance its functionality. It supports the Session Initiation Protocol (SIP) and H.323, making it compatible with a wide range of VoIP service providers. Additionally, the ATA 188 features Quality of Service (QoS) settings, which prioritize voice traffic over the internet, ensuring clear voice quality without interruptions or delays. This is essential for maintaining a professional communication experience, especially in business environments.

Another characteristic of the ATA 188 is its user-friendly configuration interface. It allows users to easily set up and manage their devices through a web-based portal. The configuration process is straightforward, with options to adjust settings such as codec selection, call features including call waiting, and call forwarding functionalities.

Security is also a priority for the ATA 188, as it provides robust protocols to protect call data. The device supports Secure Real-time Transport Protocol (SRTP) and Transport Layer Security (TLS) to encrypt voice traffic and manage signaling securely. This ensures that sensitive conversations remain confidential.

Overall, the Cisco Systems ATA 188 is a reliable and efficient solution for users looking to transition from traditional telephony to VoIP. Its dual-line capacity, compatibility with multiple VoIP standards, user-friendly configuration, and built-in security features make it a valuable asset for both personal and professional communication solutions. In an ever-evolving telecommunications landscape, the ATA 188 remains a relevant and practical choice for integrating legacy telephony with modern internet-based services.
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