Frame Relay Applications: Voice over Frame Relay - Page 3
Voice over Frame Relay service is enabled by the use of Frame Relay communications devices, such as routers or FRADs, configured with voice modules. These devices are sometimes referred to as Voice FRADs, or VFRADs.
Although VoFR implementations are efficient and cost effective for intra-enterprise or intra-corporate communication, there are considerations, such as quality, to be made regarding the use of packetized voice when dealing with non-Frame Relay WAN, or off-net, users.
Figure 15-26 illustrates how a typical Voice over Frame Relay implementation might look, supporting simultaneously both on-net (VoFr) and off-net (POTS) implementations.
Figure 15-27 illustrates how voice and data can be merged to more effectively utilize WAN resources by the addition of a router to support data communication between enterprise sites.
Our next segment from Cisco Press' Network Consultants Handbook will discuss Frame Relay Traffic Shaping.