Cisco Systems H.323 specification

Appendix C Example of an HSI Configuration File

#CC: Call Control, EC: Eisup Cause, HC: H323 Cause

#For the H323 cause code values see ITU-T: Q.850

#The mappings below are considered constant and not provisionable.

#They can be made provisionable by moving them from the CCPackage

#to the SYS_CONFIG_STATIC package.

#The following is the Eisup to H323 cause code map.

#When the Eisup cause on the left is received from Eisup,

#the H323 cause on right is sent to H323.

#Note: the reverse is not true, this is a one way mapping.

#The H323 to Eisup cause map is defined further down.

CC_EC_UnallocatedNumber	= CC_HC_UnallocatedNumber
CC_EC_NoRouteToTns	= CC_HC_NoRouteToSpecifiedTransitNetwork
CC_EC_NoRouteToDest	= CC_HC_NoRouteToDestination
CC_EC_SpecialInformationTone	= CC_HC_SendSpecialInformationTone
CC_EC_MisdialledTkPrefix	= CC_HC_MisdialedTrunkPrefix
CC_EC_ChUnacceptable	= CC_HC_ChannelUnacceptable
CC_EC_CallAwardedDeliveredEstCh	= CC_HC_CallAwardedEstablishedChannel
CC_EC_Preemption	= CC_HC_Preemption
CC_EC_PreemptionCctRes	= CC_HC_PreemptionCircuitReservedForReuse
CC_EC_NormalClearing	= CC_HC_NormalCallClearing
CC_EC_UserBusy	= CC_HC_UserBusy
CC_EC_NoUserResponding	= CC_HC_NoUserresponding
CC_EC_NoAnswerAlertedUser	= CC_HC_NoAnswerFromAlertedUser
CC_EC_SubAbscent	= CC_HC_SubscriberAbsent
CC_EC_CallRejected	= CC_HC_CallRejected
CC_EC_NumberChanged	= CC_HC_NumberChanged
CC_EC_RedirectionToNewDest	= CC_HC_RedirectionToNewDestination
CC_EC_RoutingError	= CC_HC_ExchangeRouteError
CC_EC_NonSelectedUserClearing	= CC_HC_NonSelectedUserClearing
CC_EC_DestOutOfOrder	= CC_HC_DestinationOutOfOrder
CC_EC_InvalidNumberFormat	= CC_HC_InvalidNumberFormat
CC_EC_FacilityRejected	= CC_HC_FacilityRejected
CC_EC_ResponseToStatusEnquiry	= CC_HC_ResponceToStatusEnquiry
	Cisco H.323 Signaling Interface User Guide

OL-4806-01 Rev. A14		C-7

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 Appendix C Example of an HSI Configuration File

Models: H.323

Appendix C Example of an HSI Configuration File

H.323 specifications