Retrieving Alarm Messages, Noncontinuous Mode

Chapter 5 Troubleshooting Cisco HSI Alarms

Retrieving Alarm Messages

Alarms can be displayed in noncontinuous mode or in continuous mode.

Noncontinuous Mode

To display all current alarms, use the rtrv-almsMML command.

Figure 5-1shows an example of an alarm message displayed with the rtrv-almsMML command (noncontinuous mode). For more information about the rtrv-almsMML command, see Appendix A, “MML User Interface and Command Reference.”

Figure 5-1 Sample Alarm Message

NodeID

Alarm Category Severity Level

Displayed only if state=cleared

STATE=CLEARED

“H 323-G W 1:A LM =\”VSC FAILURE\”,SEV=M J

The example in Figure 5-1shows a Cisco Public Switched Telephone Network (PSTN) Gateway (PGW 2200) communication failure on the Cisco HSI that has the node ID H323-GW1. The resulting message is an alarm with a major severity level.

Continuous Mode

To display the names of active alarms and new alarm events, use the rtrv-alms:contMML command.

Table 5-3defines the message components that are displayed when the rtrv-alms:contMML command is used. The following is sample output from this command. For more information about the rtrv-alms:contMML command, see Appendix A, “MML User Interface and Command Reference.”

GW Signaling Gateway		2000-12-05 14:19:22
M	RTRV
"H323-GW1: 2000-11-27 11:25:12.259, ** ALM=\"VSC FAILURE\",SEV=MJ”
"H323-GW1: 2000-11-27 11:25:13.259,			ALM=\"VSC FAILURE\",SEV=MJ”STATE=CLEARED
"H323-GW1: 2000-11-27 11:25:13.260, ** ALM=\"CONFIGURATION FAILURE\",SEV=MJ”
"H323-GW1: 2000-11-27		11:25:14.011, A^ ALM=\"ENDPOINT CHANNEL INTERFACE FAILURE\",SEV=IF”
"H323-GW1: 2000-11-27		11:25:14.012, A^ ALM=\"ENDPOINT CHANNEL INTERFACE FAILURE\",SEV=IF”

/* Listening for alarm events... (Ctrl-C to stop) */

"H323-GW1: 2000-11-27 11:25:13.259, ** ALM=\"VSC FAILURE\",SEV=MJ”

/* Ctrl-C pressed */

	Cisco H.323 Signaling Interface User Guide
	Cisco H.323 Signaling Interface User Guide
OL-4806-01 Rev. A14		5-3
OL-4806-01 Rev. A14		5-3

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.

Cisco Systems H.323 manual Retrieving Alarm Messages, Noncontinuous Mode, Continuous Mode

Models: H.323