Avaya IP500, Руководство по установке

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Installing IP500/IP500 V2 Page 49
15-601042 Issue 28c (19 August 2013) IP Office 9.0
System Overview: IP Office Phones
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D100 Series: These DECT handsets (up to 8) use a base station that connects to the IP Office system using a SIP
trunk and appear on the IP Office as SIP extensions.
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Softphone: Avaya IP Office Video Softphone application.
1.14 VoIP
IP Office is a converged telephony system, that is it combines aspects of traditional PABX telephone systems and IP data
and telephony systems. This works at various levels.
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Individual phone users can control the operation of their phone through applications running on their PC.
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Data traffic can be routed from the LAN interface to a telephony trunk interface, for example a dial-up ISP
connection.
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Voice traffic can be routed across internal and external data links. This option is referred to as voice over IP (VoIP).
The VoIP mode of operation can include external SIP trunks, IP trunks between customer systems and/or H.323 or SIP IP
telephones for users. In either case the following factors must be considered:
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The IP Office control unit must be fitted with voice compression channels . These are used whenever an IP
device (trunk or extension) needs to communicate with a non-IP device (trunk or extension) or to a device that
uses a different codec.
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A network assessment is a mandatory requirement for all systems using VoIP. For support issues with VoIP, Avaya
may request access to the network assessment results and may refuse support if those are not available or
satisfactory.
A network assessment would include a determination of the following:
· A network audit to review existing equipment and evaluate its capabilities, including its ability to meet both current
and planned voice and data needs.
· A determination of network objectives, including the dominant traffic type, choice of technologies, and setting voice
quality objectives.
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The assessment should leave you confident that the implemented network will have the capacity for the foreseen
data and voice traffic, and can support H.323, DHCP, TFTP and jitter buffers in H.323 applications.
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An outline of the expected network assessment targets is:
Test Minimum Assessment Target
Latency Less than 150ms.
Packet Loss Less than 3%.
Duration Monitor statistics once every minute for a full week.
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