A testing apparatus for collecting one or more downhole fluid samples from a wellbore, comprising: a carrier; a first sampler assembly supported by the carrier, the first sampler assembly comprising: a first sampler device including one or more first ports, a first flow control device to control flow through the one or more first ports; a first actuator to control the first flow control device; and a first acoustic modem (25Mi+2) having a first transceiver assembly converting acoustic messages into electrical signals, and a first receiver electronics to decode the electrical signals and provide first control signals to the first actuator responsive to the acoustic message being directed to the first acoustic modem (25Mi+2); and a second sampler assembly supported by the carrier, the second sampler assembly comprising: a second sampler device including one or more second ports, a second flow control device to control flow through the one or more second ports; a second actuator to control the first flow control device; and a second acoustic modem (25Mi+3) having a second transceiver assembly converting acoustic messages into electrical signals, and a second receiver electronics to decode the electrical signals and provide second control signals to the second actuator responsive to the acoustic message being directed to the second modem (25Mi+3). a carrier; a first sampler assembly supported by the carrier, the first sampler assembly comprising: a first sampler device including one or more first ports, a first flow control device to control flow through the one or more first ports; a first actuator to control the first flow control device; and a first acoustic modem (25Mi+2) having a first transceiver assembly converting acoustic messages into electrical signals, and a first receiver electronics to decode the electrical signals and provide first control signals to the first actuator responsive to the acoustic message being directed to the first acoustic modem (25Mi+2); and a first sampler device including one or more first ports, a first flow control device to control flow through the one or more first ports; a first actuator to control the first flow control device; and a first acoustic modem (25Mi+2) having a first transceiver assembly converting acoustic messages into electrical signals, and a first receiver electronics to decode the electrical signals and provide first control signals to the first actuator responsive to the acoustic message being directed to the first acoustic modem (25Mi+2); and a second sampler assembly supported by the carrier, the second sampler assembly comprising: a second sampler device including one or more second ports, a second flow control device to control flow through the one or more second ports; a second actuator to control the first flow control device; and a second acoustic modem (25Mi+3) having a second transceiver assembly converting acoustic messages into electrical signals, and a second receiver electronics to decode the electrical signals and provide second control signals to the second actuator responsive to the acoustic message being directed to the second modem (25Mi+3). a second sampler device including one or more second ports, a second flow control device to control flow through the one or more second ports; a second actuator to control the first flow control device; and a second acoustic modem (25Mi+3) having a second transceiver assembly converting acoustic messages into electrical signals, and a second receiver electronics to decode the electrical signals and provide second control signals to the second actuator responsive to the acoustic message being directed to the second modem (25Mi+3).