The rate parameter specifies the default (and highest) sampling rate that the conference bridge will utilize. All callers who call into this channel will have their audio transcoded into this sampling rate if they are not already at that rate. For the purposes of audio mixing, this defines the lowest sampling rate in relation to the system-if two callers have HD phones but call into a conference where the rate is 8000, those callers will have their audio sampled down to the lower rate.

Parameter syntax: <param name="rate" value="8000"/>

Available options: 8000, 12000, 16000, 24000, 32000, and 48000