This object is used to provision the jitter buffer mode to be apply to a call connection. The possible values are: 'fixed' : means use a constant jitter buffer size, which is defined by the vismJitterInitialDelay (specify in CISCO-VISM-MODULE-MIB MIB) variable. The DSP will be instructed to use fixed with no time-stamps mode. 'adaptive': means let the DSP pick the optimal value for the call connection. 'fixedWithTimeStamp': means use a constant jitter buffer size, which is defined by the vismJitterInitialDelay variable. The DSP will be instructed to use fixed with time-stamps mode. For 'g711u', 'g711a', 'clearChannel', and 'lossless' the default value is fixed. For 'g726r32000', 'g729a', 'g729ab', 'g726r16000', 'g726r24000','g726r40000', 'g723h','g723l', 'g723ah' and 'g723al' the default value is adaptive.