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Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 2 Getting Started
Implementing LVS
This table is based on the following assumptions:
• Bandwidth Calculated with No Silence Suppression
• 20 Millisecond of payload per RTP packet
Note The use of silence suppression can reduce the average bandwidth budget by 30% or more.
For more information about bandwidth calculation, refer to the following websites:
http://www.erlang.com/calculator/lipb/
http://www.packetizer.com/voip/diagnostics/bandcalc.html
Caring for Your Hardware
The SPA9000, SPA400, and the SPA900 Series phones are electronic device that should not be exposed
to excessive heat, sun, cold or water. To clean the equipment, use a slightly moistened paper or cloth
towel. Do not spray or pour cleaning solution directly onto the hardware unit.
Table 2-1 Ethernet Bandwidth Budget for Off-Net VoIP Calling
Codec
Approximate bandwidth budget for each
side of conversation
2 calls 4 calls 6 calls 8 calls
G.711 110 kbps 220 kbps 440 kbps 660 kbps 880 kbps
G.726-40 87 kbps 174 kbps 348 kbps 522 kbps 696 kbps
G.726-32 79 kbps 158 kbps 316 kbps 474 kbps 632 kbps
G.726-24 71 kbps 142 kbps 284 kbps 426 kbps 568 kbps
G.726-16 63 kbps 126 kbps 252 kbps 378 kbps 504 kbps
G.72 9 55 kbps 110 kbps 220 kbps 330 kbps 440 kbps