Advantech MIC-3369C Guía de instalación descargar pdf (Pagina 61)

Dialogic

System Release 6.1 CompactPCI for Windows

Release Update 61

1.19 New QoS Alarms for RTCP and RTP Inactivity

Dialogic

IPT Boards monitor for various Quality of Service (QoS) alarms such as

excessive average jitter, percentage of lost packets, and RTP packet latency. With the

Service Update, two new QoS alarms for Dialogic

IPT Boards are provided:

QOSTYPE_RTCPTIMEOUT

QoS alarm for Real Time Control Protocol (RTCP) inactivity

QOSTYPE_RTPTIMEOUT

QoS alarm for Real Time Protocol (RTP) inactivity

Note: The two new QoS alarms are supported on Dialogic

IPT Boards only.

The purpose of these alarms is to indicate when transmission of RTCP and RTP packets

from the remote endpoint has stopped completely (i.e., when the IP network fails), as

opposed to an intermittent interruption (which can be monitored through the lost packets

alarm, for example).

If an RTCP or RTP timeout alarm is received, the application can take action to release

SIP/H.323 channels that remain “hung,” without having to restart the application to

recover. The application is responsible for assessing the RTCP and RTP timeout situation

and determining the appropriate response. The timeout values are configurable.

1.19.1 Implementing QoS Alarms

The following sections provide guidelines for implementing QoS alarms in your

application. Either the Dialogic

Global Call API or Dialogic

IP Media Library API can be

used for this purpose.

• Implementing QoS Alarms Using Dialogic

Global Call API

• Implementing QoS Alarms Using Dialogic

IP Media Library API

1.19.1.1 Implementing QoS Alarms Using Dialogic

Global Call API

The following steps provide guidelines for implementing QoS alarms in your application

using the Dialogic

Global Call API. For details on the Dialogic

IP Media Library data

structures that are mentioned, see the Dialogic

IP Media Library API Library Reference.

For details on the Global Call functions that are mentioned, see the Dialogic

Global Call

API Library Reference. In addition, the Dialogic

Global Call IP Technology Guide

provides information about using Global Call to implement QoS alarms.

1. Optional steps before enabling a QoS alarm:

a. Call gc_GetAlarmParm( ) to retrieve the current settings of QoS parameters on

the specified IP channel.

b. If you need to change current QoS parameter values, set up the

IPM_QOS_THRESHOLD_INFO structure with desired values. This structure

contains one or more IPM_QOS_THRESHOLD_DATA structures. Note that you

must explicitly specify the value for every parameter in the

IPM_QOS_THRESHOLD_DATA structure, even if you want to use the default

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