Chapter 3 Configuring the Cisco ATA for MGCP

Configuring the Cisco ATA Using a TFTP Server

cfgfmt Tool Syntax and Examples

The syntax of the cfgfmt tool follows:

Syntax

cfgfmt [options] input output

Syntax Definitions—Options

-eRc4Passwd—This option directs the Cisco ATA to use Rc4Passwd as the key (up to eight hexadecimal characters) to encrypt or decrypt the input text file. However, if the Cisco ATA EncryptKey parameter in the input text file is not 0, then the value of that parameter is used to encrypt the output binary file, and Rc4Passwd is ignored. The -eportion of this option means that the Cisco ATA will use the weaker encryption method.

-E—This option directs the Cisco ATA to not use the value of the EncryptKey parameter, as set in the input text file, to encrypt the output binary configuration file.

-xRc4Passwd—This option directs the Cisco ATA to use Rc4Passwd, which must be a hexadecimal string of as many as 64 characters, as the key to encrypt or decrypt the input text file. However, if the Cisco ATA EncryptKeyEx parameter in the input text file is not 0, then the value of that parameter is used to encrypt the output binary file, and Rc4Passwd is ignored. The -xportion of this option means that the Cisco ATA will use the stronger encryption method.

-X—This option directs the Cisco ATA to not use the value of the EncryptKeyEx parameter, as set in the input text file, to encrypt the output binary configuration file.

-tPtag.dat—This file, provided with the Cisco ATA software version you are running, is used by the cfgfmt tool to format a text input representation of the parameter/value pairs to its output binary representation. Be sure this file resides in the same directory from which you are running the cfgfmt program.

-sip—Specify this tag if you are using the SIP protocol so that the cfgfmt tool will include only the SIP protocol parameters in the converted output binary file.

-h323—Specify this tag if you are using the H.323 protocol so that the cfgfmt tool will include only the H.323 protocol parameters in the converted output binary file.

-mgcp—Specify this tag if you are using the MGCP protocol so that the cfgfmt tool will include only the MGCP protocol parameters in the converted output binary file.

-sccp—Specify this tag if you are using the SCCP protocol so that the cfgfmt tool will include only the SCCP protocol parameters in the converted output binary file.

-g—This tag omits sensitive parameters in an ata<macaddress> file that was created with a version of the cfgfmt tool prior to version 2.3.

Some parameters, specified in the ptag.dat file used by the cfgfmt tool, are marked as sensitive information (these parameters could include UIPassword, UID, PWD0). These parameters are not included in the output binary file if the -g switch is specified in the cfgfmt syntax.

Syntax Definitions—Required Parameters

Input—This is the input text file representation of the Cisco ATA configuration file.

Output—This is the final output binary file that Cisco ATA uses as the TFTP configuration file.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)

3-14

OL-4803-01

 

 

Page 48
Image 48
Cisco Systems ATA 186, ATA 188 manual Syntax of the cfgfmt tool follows, Syntax Definitions-Options

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.