2.14.5. TYPE DSP - Changing the DSP (Signal Processor) Setting
at an HG 3500 
The parameter JITBUFD only takes effect if the parameter JBMODE
in the JB branch is set to 0 (LEGACY MODE).
The parameter VADEN is no longer valid. To configure Voice
Activity Detection, you should use the parameter branch TYPE=ASC, parameter
VAD (see Section 13.2,
“TYPE ASC - Setting the Codec List for DMC Connections, RTP Packet Size, and Voice Activity Detection”).