S/W D/L KEY DSP5 & VOFR Software key that allows existing DSP5 or DSP5 VoFR hardware to be upgraded to the latest HCV, LD-Celp, A-Celp A, A-Celp, and VoFR A-Celp A loads contained on the 90-6339-01 and 90-6339-02 DSP5 VoFR, and 90-0038-17 and 90-0038-19 D

S/W D/L KEY DSP5 & VOFR Software key that allows existing DSP5 or DSP5 VoFR hardware to be upgraded to the latest HCV, LD-Celp, A-Celp A, A-Celp, and VoFR A-Celp A loads contained on the 90-6339-01 and 90-6339-02 DSP5 VoFR, and 90-0038-17 and 90-0038-19 DSP5 cards. This upgrade will allow both the TDM and VoFR voice compression algorithums to co-exist on the DSP5.