7 qos setup, 1 enable qos, 2 disable qos – Planet Technology IPX-2000 User Manual
Page 37: 8 virtual server, Qos setup, Enable qos, Disable qos, Virtual server
4.7 QoS Setup
To assure the bandwidth reserved for the outgoing VoIP traffic over regular data traffic from LAN, the
QoS Setup page offers three parameters to characterize the WAN link. The default QoS setting is
disabled because these parameters must be correctly given according to the actual WAN speed.
4.7.1 Enable QoS
1. Click
Enable.
2. Enter
the
WAN Uplink Speed, WAN Downlink Speed, and Uplink VoIP Reserved (bandwidth).
3. Click
Apply.
For a popular 2M/256K ADSL program, the WAN uplink speed would be 256 and the WAN downlink
speed would be 2048. The Uplink VoIP reserved could be, say, 192 out of the total 256 kbps to allow 2
concurrent G.711 calls. Following is the table of WAN speed related to various codecs.
Codec Information
Bandwidth Calculations
Codec & Bit Rate
(Kbps)
Codec
Sample
Size
(Bytes)
Codec
Sample
Interval
(ms)
Mean
Opinion
Score
(MOS)
Voice
Payload
Size
(Bytes)
Voice
Payload
Size (ms)
Packets
Per
Second
(PPS)
Bandwidth
Required
(Kbps)
G.711 (64 Kbps)
80
10
4.1
160
20
50
87.2
G.729 (8 Kbps)
10
10
3.92
20
20
50
31.2
G.723.1 (6.3 Kbps)
24
30
3.9
24
30
34
21.9
G.723.1 (5.3 Kbps)
20
30
3.8
20
30
34
20.8
G.726 (32 Kbps)
20
5
3.85
80
20
50
55.2
G.726 (24 Kbps)
15
5
60
20
50
47.2
4.7.2 Disable QoS
Click Disable, and then click Apply.
4.8 Virtual Server
You can configure IP PBX as a virtual server for remote users to access services such as the Web or
FTP at your local site via Public IP Addresses. With proper settings, IP PBX can automatically redirect
inbound traffic from WAN to local servers configured with private IP addresses. In other words,
26