Chapter 7 Configuring and Debugging Fax Services

Using Fax Pass-through Mode

Note The Cisco ATA can also accept standard-based protocol-level codec switch requests, but cannot send such requests. Therefore, to interoperate with a Cisco gateway, use the Cisco-proprietary codec switch.

This section contains the following topics:

•Configuring the Cisco ATA for Fax Pass-through mode, page 7-2

•Configuring Cisco IOS Gateways to Enable Fax Pass-through, page 7-3

Configuring the Cisco ATA for Fax Pass-through mode

Fax Pass-through mode requires configuring two configuration parameters:

AudioMode, page 7-2

ConnectMode, page 7-3

AudioMode

Description

The AudioMode parameter is a 32-bit value. The lower 16 bits apply to the Phone 1 port of the Cisco ATA and the upper 16 bits apply to the Phone 2 port of the Cisco ATA.

Example

The following is an example of configuring the Phone 1 port of the Cisco ATA for fax pass-through mode:

0xXXXX0015

Translation

This setting translates to the following bitmap:

xxxx xxxx xxxx xxxx 0000 0000 0001 0101

•Bit 0 = 1—Enables G.711 silence suppression (VAD)

•Bit 2 = 1—Enables Fax CED tone detection and switchover upon detection

•Bit 4 = 1, Bit 5 = 0—DTMF transmission method = out-of-band through negotiation

•Bit 6 = Bit 7 = 0—Hookflash transmission method = disable sending out hookflash

Note The values XXXX in the example apply to the Phone 2 port of the Cisco ATA.

To configure the same value for the Phone 2 port of the Cisco ATA, the value would be 0x0015XXXX. The configuration of one port is independent from the configuration of the other port.

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

7-2

OL-4008-01

 

 

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Cisco Systems ATA 188 manual Configuring the Cisco ATA for Fax Pass-through mode, AudioMode, ConnectMode, Translation
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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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