Cisco Systems H.323 manual MML Commands, MML Command Syntax, MML Command Conventions

Models: H.323

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Appendix A MML User Interface and Command Reference

MML Commands

MML Commands

To execute MML commands, log in to Cisco HSI and perform one of the following tasks:

Start the MML session (see the “Starting an MML Session” section on page A-3) and enter a command.

Type a batch file command to start an MML session (see the “Starting a Batch File” section on page A-4).

MML Command Syntax

 

MML commands use the following syntax:

 

command_name:target:[Parameter_List][;comments]

 

Parameter_List consists of a parameter name, an equal sign, and a value for the parameter.

 

The keywords and the value strings need not be enclosed in quotation marks. Anything you enter after a

 

semicolon (;) is treated as a comment. Use only one MML command on each line.

 

The “MML Command Reference” section on page A-7contains detailed information about the

 

individual MML commands.

 

 

 

Tip

 

Use the Up Arrow key to scroll through all previous MML commands in turn.

 

 

Use the Down Arrow key to move forward in the command buffer.

 

 

Use the Left and Right Arrow keys to move along the command line.

 

 

Use the Backspace, Delete, and alphanumeric keys to edit an MML command.

 

 

 

MML Command Conventions

The MML commands use the conventions shown in Table A-1.

Table A-1 MML Command Conventions

 

 

 

 

Convention

Meaning

Comments and Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

Square brackets ([ ])

Optional elements

command [abc]

 

 

 

 

 

 

abc is optional (not required),

 

 

 

 

 

 

but you can choose it.

 

 

 

 

 

 

 

 

 

 

 

 

Vertical bars ( )

Separated alternative elements

command [abc def]

 

 

 

 

 

 

You can choose either abc or

 

 

 

 

 

 

def, or neither, but not both.

 

 

 

 

 

 

 

 

 

 

 

 

Braces ({ })

Required choice of alternative

command {abc def}

 

 

 

 

 

elements

You must use either abc or def,

 

 

 

 

 

 

 

 

 

 

 

 

but not both.

 

 

 

 

 

 

 

 

 

 

 

 

Angle brackets (< >)

Symbol specifier

 

 

 

 

 

 

 

 

 

 

 

 

Cisco H.323 Signaling Interface User Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A-2

 

 

 

 

OL-4806-01 Rev. A14

 

 

 

 

 

 

 

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Cisco Systems H.323 manual MML Commands, MML Command Syntax, MML Command Conventions

H.323 specifications

Cisco Systems H.323 is a set of standards designed for transmitting audio, video, and data over packet-switched networks. It is a critical technology that enables real-time communication and has become integral to the world of VoIP (Voice over Internet Protocol) and video conferencing applications. Originally developed by the ITU-T, H.323 has been widely adopted and implemented by Cisco Systems, allowing organizations to leverage reliable and scalable communication solutions.

One of the standout features of H.323 is its ability to support interoperability among varying equipment and platforms. This means that devices from different manufacturers can communicate seamlessly, which is vital in a diverse technical environment. H.323 does this by defining protocols that handle signaling, media transport, and control, ensuring that various systems can work together effectively.

Key technologies utilized within H.323 include H.225 and H.245 signaling protocols. H.225 is responsible for call setup and management, establishing communication between endpoints. In contrast, H.245 manages the negotiation of media channels, allowing devices to configure themselves based on the capabilities of each other. This adaptability is crucial for dynamic network conditions typical in VoIP applications.

Another defining characteristic of H.323 is its support for multiple types of multimedia communication, including point-to-point and multipoint calls. This flexibility supports everything from simple audio calls to complex videoconferencing setups, where many participants can share video and audio streams concurrently. Cisco enhances this capability through its hardware and software offerings, optimizing performance for conference calls.

H.323 also features robust error resilience mechanisms. This ensures that real-time data, which is typically sensitive to delays and losses, can be transmitted with minimal disruption. Moreover, it facilitates quality of service (QoS) implementation, allowing organizations to prioritize voice and video traffic over less critical data services, thereby improving the overall user experience.

In conclusion, Cisco Systems H.323 stands out as a comprehensive solution for real-time communication over packet-based networks. Its main features, including interoperability, multimedia support, and enhanced error resilience, position it as a relevant technology in both corporate and personal communication settings. As organizations continue to adopt cloud and hybrid communication models, H.323 remains a reliable backbone for ensuring connectivity and collaboration across diverse platforms.