Avaya VoIP Monitoring Manager Reference Release 3.0 Manual de usuario descargar pdf (Pagina 85)

Overview of VoIP Monitoring Manager (Server)

About RTCP Monitor

The RTCP monitor collects the RTCP packets sent from the AVAYA™ endpoints and stores the

information in a proprietary database. The RTCP monitor also runs as a sub-agent of the

Windows SNMP agent. All the information contained in the database can be queried through

SQL.

The specifications for querying the database are found in:

 The RTP MIB. The reference is located at http://www.ietf.org/rfc/rfc2959.txt

 The proprietary AVAYA-VMON-MIB (The ASN.1 definitions of this MIB and associated

traps are included as text files in the installation)

See Also

VoIP Monitoring Manager Options

Components of VoIP Monitoring Manager

Starting the VoIP Monitoring Manager

Components of RTT

RTT can comprise the following four components:

 Propagation delay: The time it takes for a packet to travel across the network from

sender to receiver. This variable is based on the speed of light and the distance the

signal must travel. For example, the propagation delay between Singapore and Boston is

much longer than the propagation delay between New York and Boston.

 Transport delay: The time it takes to traverse the network devices along a transmission

path. Networks containing many routers, firewalls, congestion and low-speed WAN

services, for example, introduce more delay than an overprovisioned LAN on a single

floor of a building.

 Packetization delay: The time it takes for a compressor/decompressor (codec) to

digitize an analog signal, build frames and then reverse the process at the other end. The

G.729 codec has a higher packetization delay than the G.711 codec.

 Jitter buffer delay: The delay introduced by the receiver while it holds one or more

packets to reduce variations in packet arrival times.

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Avaya VoIP Monitoring Manager Reference Release 3.0 Manual de usuario Pagina 85