MP-202 Telephone Adapter
74
LTRT-50604
MP-202
Note:
Class statistics will only be available after defining at least one class
(otherwise the screen will not present any information).
Figure
8-11: QoS - Class Statistics
8.6
Configuring Basic VoIP QoS
The 'Traffic Shaping' feature only ensures priority to calls that are originated
inside
the MP-
202. When giving VoIP priority over data, the bottleneck is effectively moved from the
Cable / ADSL modem into the MP-202. To give priority to calls from the LAN, you must
define a traffic priority rule (for SIP and RTP from the device on the LAN).
This section recommends a minimal QoS configuration that ensures sufficient QoS for
VoIP calls when the gateway is connected behind a broadband (cable or DSL) modem with
limited uplink bandwidth and the user runs bandwidth-consuming applications on their PC.
Since most modems do not have any priority mechanisms, the Tx bandwidth of the
gateway should be limited according to the modem’s uplink bandwidth. Since the gateway
will automatically give higher priority to VoIP packets (in its internal queues), it is not
necessary to define traffic shaping classes.
¾
To perform a minimal QoS configuration for VoIP:
1.
Click on menu 'QoS' on the left sidebar and then click tab 'Traffic Shaping'; the Quality
of Service - Traffic Shaping screen opens.
2.
Click 'New Entry' (or the icon under column 'Action'); the screen 'Add Device Traffic
Shaping' opens.