Chapter 5 Troubleshooting Cisco HSI Alarms

Acknowledging and Clearing Alarms

Table 5-3 Elements of Continuous Mode Messages

Element

Description

 

 

systemId

The name of your device and its identifier.

 

 

YYYY-MM-DD

The year, month, and day that the alarm or information event occurred.

 

 

hh-mm-ss-ms

The hour, minute, second, and millisecond that the alarm or information event

 

occurred.

 

 

severity

The severity level of the alarm or information event. Severity is represented by a

 

two-character indicator with the following meanings:

 

• *C—Critical alarm. A critical alarm indicates that a serious problem exists

 

in the network. It causes a restart or reboot of the Cisco HSI. Clear critical

 

alarms immediately.

 

• **—Major alarm. A major alarm indicates the existence of a problem that

 

disrupts service. Clear major alarms immediately. Major alarms differ from

 

critical alarms in that they do not initiate automatic recovery processes.

 

• *^—Minor alarm. A minor alarm indicates the presence of a problem that

 

does not disrupt service. Note and clear minor alarms as soon as possible.

 

• A^—Informational event. An informational event indicates the presence of

 

an atypical network condition, such as a timer expiration, a value that has

 

exceeded preset thresholds, or unexpected response from an end point to a

 

signaling messages sent by the Cisco HSI.

 

• — (Empty spaces in two leftmost columns). The alarm or event has been

 

cleared. “STATE=CLEARED” is displayed.

 

 

almCat

Alarm category. A text string that indicates whether the message is an alarm or

 

an informational event and the MML alarm or event message. See Table 5-4for

 

a list of alarm categories.

 

Note Despite its name, the alarm category field is used for both alarms and

 

informational events.

 

 

Acknowledgement

Indicates whether the alarm has been acknowledged.

 

 

Acknowledging and Clearing Alarms

To acknowledge that an alarm is recognized but not cleared, use the ack-almMML command. See Appendix A, “MML User Interface and Command Reference,” for more information.

To clear an alarm, use the clr-almMML command. See Appendix A, “MML User Interface and Command Reference,” for more information.

 

Cisco H.323 Signaling Interface User Guide

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Cisco Systems H.323 manual Acknowledging and Clearing Alarms, Element Description, Yyyy-Mm-Dd
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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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