![]() The ITU describes network delay for voice applications in recommendation G.114 as shown in Table 8-3, this recommendation defines three bands of one-way delay. ![]() As delays increase, the communication between two people falls out of synch (for example, they speak at the same time or both wait for the other to speak) this condition is called talker overlap. The generally accepted limit for good quality voice connection delay is 150 milliseconds (ms) one-way. Correctly accounting for all potential delays ensures that overall network performance is acceptable. When designing networks that transport voice, you must understand and account for the network's delay components. Packet delay can cause voice quality degradation. This section discusses these factors and ways to minimize them. ![]() Overall voice quality is a function of many factors, including delay, jitter, packet loss, and echo.
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