WAN
To conserve even more bandwidth, RTP header compression (cRTP) can be used on
Serialization delay
Serialization delay refers to the delay that is associated with sending bits across a physical medium. Serialization delay is important to IP Telephony because this delay can add significant jitter to voice packets, and thus impair voice quality. See Layer 3 QoS on page 317 for techniques to minimize serialization delay.
Network design
Routing protocols and convergence
When designing a IP Telephony network across a WAN, some care should be taken when selecting a routing protocol or a
The selection of a routing protocol depends on several factors:
●If a network has a single path to other networks, static routes are sufficient.
●If multiple paths exist, is convergence time an issue? If so, EIGRP and OSPF are appropriate.
●Are open
In general, Avaya recommends the use of OSPF when routing protocols are required. OSPF allows for relatively fast convergence, and does not rely on proprietary protocols.
In many organizations, because of the expense of dedicated WAN circuits,