Chapter 4 Managing the Cisco HSI

Gapping

Note We strongly recommend that you set all packages to log level 0x0000 in a live network. Set them to higher levels only when you debug on an offline network.

Setting Logging Levels

The set-logMML command dynamically alters the log level setting during the execution of the system. However, the set-logMML command does not affect the logging level of any current MML processes. For more information about the set-logcommand, see Appendix A, “MML User Interface and Command Reference.”

Note The enabling of logging severely impacts HSI performance. We recommend the HSI be running at less than 2 calls per second when you enable logging. Logging will be automatically disabled when the HSI enters overload level 3. You can reenable logging when the HSI exits overload.

RADVision Logging

The Cisco HSI application provides the capability (through MML) to initiate RADVision logging. The contents of the resultant log file are not under the control of the Cisco HSI application.

Use the radlog MML command to start and stop RADVision logging. RADVision logging can be directed to a file or into the standard logging output. For information about this command, see Appendix A, “MML User Interface and Command Reference.”

Gapping

The gapping level can be set from 0 to 100 percent. From 0 to 99 percent, the call type (normal or priority) is checked against the gapping level call status type. At 100 percent gapping, all calls are gapped regardless of call type.

Setting Gapping

To activate call gapping, complete the following steps:

Step 1 Determine the direction of the call to be gapped:

•Incoming (inc) for calls originating from the H.323 network

•Outgoing (otg) for calls originating from the PSTN Gateway (PGW 2200)

•Both (both) for calls originating from either side

Step 2 Determine what type of calls are to be gapped:

•Normal calls (nonpriority calls)

•All calls

Step 3 Determine the percentage of calls to be gapped. The percentage can range from 0 to 100 percent. If 100 percent is selected, all calls are gapped, regardless of the type of call.

 

 

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Cisco Systems H.323 manual RADVision Logging, Setting Gapping, Setting Logging Levels
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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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