User`s guide

VoiceFinder AP1100 VoIP Gateway User’s Guide Version 1.1
AddPac Technology Co., Ltd. -
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caused by the devices that handle voice information. Handling delays have a
significant impact on voice quality in a packetized network.
CODEC-induced delays are considered a handling delay. Table 5-2
shows the
delay introduced by different CODECs.
Table 5-2: CODEC-Induced Delays
CODEC Bit Rate (kbps) Compression Delay (ms)
G.711 PCM 64 0.75
G.726 ADPCM 32 1
G.728 LD-CELP 16 3 to 5
G.729 CS-ACELP 8 10
G.729a CS-ACELP 8 10
G.723.1 MP-MLQ 6.3 30
G.723.1 ACELP 5.3 30