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Cisco Systems H.323 manual Hairpin 38 Fax

Models: H.323

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Contents

H.323 Stack Configuration

10

 

Nonprovisionable Data

11

 

MML Provisionable Data 11

 

H.323

System Parameters

11

Q.931

Parameters

11

 

RAS Parameters

13

 

H.245

Parameters

15

 

Codec Selection

18

 

Quick Reference for Important Parameters 18

HSI Feature Configuration

22

 

Asymmetric Codec Treatment

23

Empty Capability Set

23

 

H.323 Hairpin 23

 

 

T.38 Fax

24

 

 

Configuring T.38

Fax on the Cisco PSTN Gateway

24

Configuring T.38

Fax on a Cisco IOS H.323 Gateway

24

Configuring T.38

Fax on a Cisco IOS MGCP Gateway

24

 

 

HSI INFORMATION Message Support

24

 

 

 

 

 

 

HSI Support for Tech Prefixes

25

 

 

 

 

 

 

 

Configuring Clear Channel on the Cisco HSI

25

 

 

 

 

 

Configuring G.726 on the Cisco HSI

27

 

 

 

 

 

 

Configuring G.729 Annex and G.729 Annex B

31

 

 

 

 

Managing the Cisco HSI

 

 

 

 

 

 

 

 

C H A P T E R 4

1

 

 

 

 

 

 

 

 

 

Introduction

1

 

 

 

 

 

 

 

 

 

 

Restarting the Cisco HSI Application

1

 

 

 

 

 

 

 

Stopping Call Processing

1

 

 

 

 

 

 

 

 

 

Starting Call Processing

2

 

 

 

 

 

 

 

 

 

Stopping the Call Processing Application

2

 

 

 

 

 

 

Starting the Call Processing Application

2

 

 

 

 

 

 

Reporting the Cisco HSI Status

2

 

 

 

 

 

 

 

 

Measurements

2

 

 

 

 

 

 

 

 

 

 

System-Related Measurements

2

 

 

 

 

 

 

 

Call-Related Measurements

3

 

 

 

 

 

 

 

 

Resetting Measurements

6

 

 

 

 

 

 

 

 

Retrieving Counters

6

 

 

 

 

 

 

 

 

 

Overload 6

 

 

 

 

 

 

 

 

 

 

 

Overload Level 1 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco H.323 Signaling Interface User Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-4806-01 Rev. A14

 

 

 

 

 

 

 

 

v

 

 

 

 

 

 

 

 

 

 

 

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Cisco Systems H.323 manual Hairpin 38 Fax
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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.