Cisco Systems H.323 appendix Parameter Name Parameter Values Description

Page 20

Chapter 3 Provisioning the Cisco HSI

H.323 Stack Configuration

Table 3-14 Common Static System Data Parameters

Parameter Name

Parameter Values

Description

 

 

 

CarrierCodeMapping

• “enabled”—a string that indicates the

Allows the mapping of a special tech prefix (the

 

feature is enabled.

format of which is CCxCy) to the

 

• Blank (“”)—indicates the feature is

DestinationCircuitID “group” field in the ARQ

 

message. This feature works only with IOS

 

disabled.

 

Gatekeeper build Release 12.2(15)T10 or above.

 

• “deleted”—indicates that the feature

 

 

 

is disabled.

 

 

 

 

ClipClirSupported

• “enabled”—a string that indicates the

Allows transit of CLI presentation/screening

 

feature is enabled.

information.

 

• Blank (“”)—indicates the feature is

Note Setting this parameter to “enabled”

 

disabled

enables use of Caller ID.

 

• “deleted”—indicates that the feature

 

 

is disabled

 

 

 

 

DtmfSupportedType

• “dtmf”—the recommended value for

Selects the DTMF type during H.245 terminal

 

interworking with Cisco gateways

capabilities exchange.

 

• “basicString”

Note Set this parameter to “dtmf” and the

 

 

DtmfSupportedDirection parameter to

 

 

“both” to enable DTMF support.

 

 

 

DtmfSupportedDirection

• “tx”—transmit to H323 endpoint

Selects DTMF transit direction.

 

• “rx”—receive from H.323 endpoint

Note Set this parameter to “both” and the

 

• “both”—transmit and receive DTMF

DtmfSupportedType parameter to “dtmf”

 

to enable DTMF support.

 

• Blank (“”), “deleted,” or any other

 

 

 

string, such as “disabled”—indicates

 

 

the feature is disabled

 

 

 

 

H225PavoSupported

• “enabled”—a string that indicates the

Allows transit of redirecting number parameter

 

feature is enabled.

(contained in Cisco CallManager H.225 setup

 

• Blank (“”)—indicates the feature is

messages—nonStandardControl field).

 

 

 

disabled

 

 

• “deleted”—indicates that the feature

 

 

is disabled

 

 

 

 

RaiSupported

For example:

Allows H.225 RAS RAI messages to be sent to the

 

• “enabled”—a string that indicates the

gatekeeper if the E-ISUP link fails or if the HSI is

 

feature is enabled.

under heavy load.

 

 

 

• Blank (“”)—indicates the feature is

Note Set this parameter to “enabled” to enable

 

the HSI to support RAI messages.

 

disabled

 

 

 

• “deleted”—indicates that the feature

 

 

is disabled

 

 

 

 

 

Cisco H.323 Signaling Interface User Guide

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OL-4806-01 Rev. A14

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Contents Provisioning the Cisco HSI MML Configuration Commands CommandCommand Description DescriptionVerifying the Configuration Introduction to MML Command Operation for HSIInitiating an MML Session to Enable Dtmf on the HSI System Configuration Data Reverting to the Base ConfigurationStatic System Data ExampleParameter Type Description Parameter, set it to Enabled Issue the command restart-softwconfirm Changing Static System DataParameter Description Default Dynamic System DataOVLDLEVEL1PERCENT OVLDLEVEL3PERCENTOVLDLEVEL1FILTER OVLDLEVEL1THRESHLOWERAlarmdebouncetime OVLDLEVEL3FILTEROVLDLEVEL3THRESHLOWER OVLDLEVEL3THRESHUPPERNonprovisionable Data MML Provisionable DataSystem Parameters ParametersParameter Name Description Type Example Update Type NullRAS Parameters Parameter Name Description Type ExampleAllowCallsWhenNonReg If this parameter is present, it String H323ESP Update Parameter Name TypeINTEGER0,1 Parameter Name Parameter Value Description Codec SelectionQuick Reference for Important Parameters 14presents important static system data parameters Parameter Name Parameter Values Description VSCBIPADDR1/2 VSCBPORTNUMBER1/2HSI Feature Configuration Parameter Name Parameter ValueHairpin Asymmetric Codec TreatmentEmpty Capability Set Configuring T.38 Fax on the Cisco Pstn Gateway Configuring T.38 Fax on a Cisco IOS H.323 GatewayConfiguring T.38 Fax on a Cisco IOS Mgcp Gateway 38 FaxConfiguring Clear Channel on the Cisco HSI HSI Support for Tech PrefixesClear Channel Parameters Example Value Example Configuration Configuring G.726 on the Cisco HSI Parameter Example Value Configuration Example Configuring the Payload Type for the MgcpConfiguring Cisco HSI g726-generic OL-4806-01 Rev. A14 Configuring G.729 Annex and G.729 Annex B ParameterOL-4806-01 Rev. A14
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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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