Appendix A MML User Interface and Command Reference

sta-trc

Related Commands

Command

Description

 

sta-callproc

Starts call processing

 

 

 

sta-trc

The sta-trccommand starts the call processing tracing function.

sta-trc:Calltype=calltype,TraceLevel=trace level[,CdAddress=address]

[,CgAddress=address],log=filename[,prd=n]

Syntax Description

 

Calltype=calltype

This parameter defines the type of call to be traced. The possible values are:

 

 

 

•

inc—For H.323-originated calls

 

 

 

•

otg—For E-ISUP-originated calls

 

 

 

• both—For calls originating from either side

 

 

 

 

 

 

TraceLevel=trace level

This parameter defines the level of detail that is recorded in the call trace.

 

 

 

The possible values are:

 

 

 

• terse—Traces only incoming/outgoing message names and RADvision

 

 

 

 

API calls.

 

 

 

• brief—In addition to terse, traces internal interfaces, and call state

 

 

 

 

changes.

 

 

 

• verbose—Traces all messages and their contents, RADvision API calls

 

 

 

 

and their contents, internal interfaces, and call state changes.

 

 

 

 

 

 

CdAddress=address

A filter used to trace calls using only the specified leading digits within the

 

 

 

called address. A match is performed on these digits and the initial called

 

 

 

address digits contained within the E-ISUP IAM message or the H225

 

 

 

SETUP message.

 

 

 

 

 

 

CgAddress=address

A filter used to trace calls using only the specified leading digits within the

 

 

 

calling address. A match is performed on these digits and the initial calling

 

 

 

address digits contained within the E-ISUP IAM message or the H.225

 

 

 

SETUP message.

 

 

 

 

 

 

log=filename

The filename for the trace output.

 

 

 

 

 

 

prd=n

The trace period (in seconds). At expiration of this period, the trace log is

 

 

 

closed. If no value is specified, the period defaults to 1800 seconds (30

 

 

 

minutes).

 

 

 

 

 

 

 

 

Defaults

 

The default trace for all calls is 30 minutes.

 

 

 

Usage Guidelines

 

Only one trace command at a time can be active. If an additional request is issued, the command is

 

 

rejected with a call trace already active indication.

 

Cisco H.323 Signaling Interface User Guide

A-38

OL-4806-01 Rev. A14

Page 137 Page 139
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Image 138
Cisco Systems H.323 manual Sta-trc, Sta-callproc Starts call processing
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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.
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