Appendix A MML User Interface and Command Reference

rtrv-alms

rtrv-alms

The rtrv-almscommand retrieves all active alarms.

rtrv-alms rtrv-alms:cont

Syntax Description

 

cont

This parameter displays alarm events until you press Ctrl-C. All active

 

 

 

 

alarms are displayed, and then a message appears (for example:

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

Examples

 

In the following example, the output contains the standard alarm definition and also a NACK or an ACK

 

 

for noninformational alarms. NACK and ACK indicate the acknowledgement status of the alarm.

 

 

gw mml> rtrv-alms

 

 

 

 

 

GW Signaling Interface

2000-12-05 14:19:22

 

 

 

M

RTRV

 

 

 

 

 

"H323-GW1: 2000-11-27 11:25:12.259, ** ALM=\"VSC FAILURE\",SEV=MJ” NACK

 

 

"H323-GW1: 2000-11-27 11:25:13.260, ** ALM=\"CONFIGURATION FAILURE\",SEV=MJ” ACK

 

 

"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”

 

 

In the following example, the output displays alarm events until you press Ctrl-C:

 

 

gw mml> rtrv-alms:cont

 

 

 

 

 

GW Signaling Interface

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 */

Related Commands

Command

Description

 

ack-alm

Acknowledges that an alarm event is recognized but does not clear the

 

 

alarm.

 

 

 

 

clr-alm

Clears an alarm event.

 

 

 

 

 

Cisco H.323 Signaling Interface User Guide

 

 

 

 

 

 

 

OL-4806-01 Rev. A14

 

 

A-25

 

 

 

 

 

Page 124 Page 126
Page 125
Image 125
Cisco Systems H.323 manual Rtrv-alms rtrv-almscont, Cont, Ack-alm, Clr-alm
Page 124 Page 126

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.
Top Page Image Contents