System Capacity
Site 1
Site 2
Network
Site 3
Site x
AspireNet allows a maximum of 50 systems to be networked. Each system will require a VoIPDB,
which by default will provide 16 channels to be shared for all IP related devices (e.g. IP Phones, IP
Trunks, AspireNet).
Network Requirements
The voice quality of VoIP depends on variables such as available bandwidth, network latency, and
quality of service initiatives (QoS), all of which are controlled by the network and internet service
providers. Because these variables are not within NEC's control, the performance of the users IP-
based voice solution cannot be guaranteed. Therefore, NEC recommends connecting the VoIP
equipment through a fully managed data network with Quality of Service (QOS) implemented.
For a network to be suitable for VoIP it must pass specific requirements. The requirements are:
• One way delay must not exceed 150 ms
• Round trip delay must not exceed 300 ms
• Packet loss must not exceed 1 %
• Data switches must be manageable
• No half-duplex equipment may be present in the network
• Routers must provide QOS
Depending upon how the QOS policies are built in the network, assignments may be needed in the CPU
(PRG 84-10).
• Adequate bandwidth for the estimated VoIP traffic must be available
See below chart for bandwidth calculations.
Below is a chart that shows the average bandwidth per VoIP call over Ethernet.
ISSUE 1.0
SL2100
Features and Specifications Manual
1-43
A
Содержание UNIVERGE SL2100
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Страница 446: ...Figure 1 19 Cascade Message Notification Flow Chart 1 SL2100 ISSUE 1 0 1 432 InMail Cascade Message Notification I ...
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Страница 571: ...Operation LCR Operation Flow Diagram ISSUE 1 0 SL2100 Features and Specifications Manual 1 557 L ...
Страница 572: ...LCR Dial LCR Dial Editing SL2100 ISSUE 1 0 1 558 LCR Least Cost Routing L ...
Страница 573: ...LCR Cost Center Code ISSUE 1 0 SL2100 Features and Specifications Manual 1 559 L ...
Страница 604: ...On pressing OK the Cancel button is disabled as follows SL2100 ISSUE 1 0 1 590 Maintenance Automatic System Update M ...
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Страница 846: ...2 Press Hold key and talk with the party SL2100 ISSUE 1 0 1 832 Tone Override T ...
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