Chapter 5 Parameters and Defaults

Operating Parameters

Table 5-1 AudioMode Parameter Bit Definitions

Bit Number

Definition

0 and 16

0/1—Disable/enable silence suppression for all audio codecs. Silence suppression is enabled by

 

default.

 

 

1 and 17

0—Enable selected low-bit-rate codec in addition to G.711. This setting is the default.

 

1—Enable G.711 only.

 

 

2 and 18

0/1—Disable/enable fax CED tone detection. This feature is enabled by default.

 

 

3 and 19

Reserved.

 

 

4-5 and 20-21

DTMF Transmission Method:

 

•

0—Always in-band.

 

•

1—By negotiation.

 

•

2—Always out-of-band.

 

•

3—Reserved.

 

 

6-7 and 22-23

Hookflash Transmission Method:

•0—Disable sending OOB hookflash message.

•1—By negotiation (H.245 message).

•2—Always out-of-band (H.245 message).

•3—Use Q931message to send user keypad information for DTMF or hookflash transmission.

8-15 and 23-31

Reserved.

RxCodec

Description

Use this parameter to specify receiving-audio codec preference. The following values are valid:

•0—G.723 (can be selected only if LBRCodec is set to 0)

•1—G.711A-law

•2—G.711µ-law

•3—G.729A (can be selected only if LBRCodec is set to 3)

Value Type

Integer

Range

0-3

Default

2

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

 

OL-4008-01

5-21

 

 

 

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Cisco Systems ATA 188 manual RxCodec, Bit Number Definition
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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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