The delay related to the respective codecs are as follows... +/- 20%.
G.711 Alaw- .5ms of delay
G.711 U-law- .4ms of delay
G,726- 1.2 delay
G.729- 5-6ms of delay
AMR- 3.7ms of delay
EVRC- 14ms of delay
G.723- 22ms delay
Packets are usually pre-encoded before Abacus sends them outl; these delay times apply on during the decoding process.