SIP User's Manual 32 Document #: LTRT-12804
Mediant 800 MSBG
b. Open the 'SIP Media Realm Table' page (Configuration tab > VoIP menu >
Media submenu > Media Realm Configuration) and define media interface(s) on
the WAN interface.
Figure 2-7: Assigning WAN Interface to Media Realm
c. Define SRDs and associate them with these SIP signaling and media interfaces.
Configure other SIP settings as required.
2.2.1.5 Configuring Quality of Service
This section describes how to configure the device to guarantee appropriate handling of
VoIP services, which are delay-sensitive. Therefore, VoIP traffic needs to be prioritized
over other classes of traffic. This is achieved by configuring Quality of Service (QoS).
The QoS configuration includes the following stages:
Defining the total WAN bandwidth assigned, for example, by your Internet Telephony
Service Provider (ITSP) - see ''Defining Total WAN Bandwidth'' on page 32
Definin
g traffic shaping classes with the minimum bandwidth guaranteed for VoIP
traffic (see ''Defining VoIP Tx Shaping Class'' on page 33)
Assig
ning the above VoIP traffic class to VoIP RTP media packets and VoIP signaling
(UDP, TCP, and TLS) traffic matching rules (''Defining VoIP Traffic Matching Rules''
on page 35)
2.2.1.5.1 Defining Total WAN Bandwidth
To define traffic shaping on the device so that packets will not be “dropped” by your ITSP,
you should configure your device with the total WAN bandwidth allocated by your ITSP. In
other words, the ITSP can be considered the bottleneck of the network and thus, the
device needs to accommodate its outgoing traffic to this bandwidth.
¾ To define the WAN bandwidth traffic shaping class:
1. Open the 'Traffic Shaping' page (Configuration tab > Data menu > QoS > Traffic
Shaping).
Figure 2-8: Traffic Shaping Page
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