Administration Manual ip500pbxw – English
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Definition
A Codec (Coder/Decoder) converts analog voice signals into
digital signals for transmission over the IP network.
Use this field to select the type of voice codec that you want the
system to use. The choice of voice codec is a trade-off between
transmission speed, sound quality and desired bandwidth usage.
The G.711 codec provides higher voice quality than G.729 but
requires 82.8kbps of bandwidth as opposed to 26.8kbps for
G.729. The system can connect to other VoIP systems that use
the same codec.
Backup Codec 1
This field specifies the first backup codec to use in the event that the far end does not support the Preferred Codec.
Backup Codec 2
This field specifies the second backup codec to use in the event that the far end does not support the Backup Codec 1.
Definition
About Quality of Service (QoS) Differentiated Services Code
Point (DSCP) is a field in an IP packet that enables different
levels of service to be assigned to network traffic. This is
achieved by marking each packet on the network with a DSCP
code and appropriating to it the corresponding level of service or
priority.
If supported, the DSCP QoS can give you a better quality
connection by using the DSCP QoS field to increase the priority
for your traffic.
QoS: RTP DSCP
This field sets the DSCP code to be used for voice/payload (RTP) traffic in your VoIP call.
QoS: Signalling DSCP
This field sets the DSCP code to be used for signalling traffic in your VoIP call.
Outbound Server
This field sets the name of the Outbound Server.
Outbound Server Port
This field sets the Outbound Server Port.
Outbound Server Transport
This field sets the type of the Outbound Server transport used.
