Specifications

Technical Concepts Nur für den internen Gebrauch
A31003-H3580-M103-2-76A9, 01-2009
9-4 HiPath 3000/5000 V8 - HG 1500 V8, Administrator Documentation
hg-09.fm
Bandwidth Requirements in LAN/WAN Environments
The overhead is calculated as follows:
Payload connections with RTP (Real-Time Transport Protocol) in a WAN environment:
The following values apply to payload connections with RTP (Real-Time Transport Protocol) in
a WAN environment:
Protocol Bytes
RTP header 12
UDP header 8
IP header 20
802.1Q VLAN tagging 4
MAC (incl. preamble, FCS) 26
Total 70
Table 9-2 Overhead Calculation
Report type Report
interval (sec)
Average
Ethernet packet size
(bytes)
Ethernet Load (incl.)
header (Kbps)
Sender report 5 140 0.2
Recipient report 5 140 0.2
Total 0.4
Table 9-3 Payload Connection Check with Parallel RTCP (Real-Time Transport Control
Protocol)
Codec Packeti-
zing para-
meter
Packet
interval/
Frame
size
(msec)
Payload
(bytes)
Packet
length
(bytes)
Payload pa-
cket (over-
head
in %)
WAN
load
(Kbps)
Packet
length
with
header
compres-
sion
(bytes)
WAN
load with
header
compres-
sion
(Kbps)
G.711 20 20 160 206 29% 82.4
G.711 30 30 240 286 19% 76.3
G.711 40 40 320 366 14% 73.2
G.711 60 60 480 526 10% 70.1
G.723.1 1 30 24 70 192% 18.7 32 8.5
G.723.1 2 60 48 94 96% 12.5 56 7.5
Table 9-4 WAN bandwidth requirements according to Codec