Abstract: Methods and systems are provided for conserving resources of a wireless communication device (WCD). A WCD may be configured to operate in one of two modes while in communication with the RAN. In a high-power mode, the WCD operates with a filtering component having a first filtering bandwidth. The first a filtering bandwidth generally enables the WCD to provide high quality audio signals based on a first audio bandwidth of an audio codec. In a low-power mode, the WCD operates with the filtering component having a second filtering bandwidth. The second filtering bandwidth enables the WCD to provide a lower quality audio signal based on a second audio bandwidth having a narrower audio bandwidth than the first audio bandwidth.

Abstract: A method is provided for measuring polarization dependent loss in an optical transmission system. In the method, a first optical signal is generated, and a polarization of the first optical signal is altered over time. The first optical signal is combined with a second optical signal from the optical transmission system to yield a combined optical signal, which is coherently detected to yield a radio frequency signal. A power of the radio frequency signal is measured. The measured power of the radio frequency signal is processed to generate an indication of the polarization dependent loss of the optical transmission system.

Abstract: A method is provided for generating fault information associated with a communication channel. In the method, a time-varying error value associated with the communication channel is received. If the error value exceeds a first threshold, a first time value associated with the error value exceeding the first threshold is stored. If the error value then falls and remains below the first threshold for a first minimum time period before the error value exceeds and remains above a second threshold that is higher than the first threshold for a second minimum time period, the first time value is deleted; otherwise, a second time value associated with the error value exceeding the second threshold is stored. The fault information comprises the first time value and the second time value.

Abstract: An arrangement and a method for testing a telecommunications circuit over Dense Wavelength Division Multiplexing (DWDM). A transmitter, which is optically coupled to the circuit, transmits a test-drive signal on the circuit. Through a network, a performance of the circuit is monitored at points along the circuit based on the transmitted test-drive signal.

Abstract: A system for testing a communication network includes a test system and a cross-connect system. The test system generates a plurality of independent low data rate test signals with first data rates. The test system combines the independent low data rate test signals to generate a high data rate test signal. The test system then transmits the high data rate test signal from the test system to a shared test port. The cross-connect system transfers the high data rate test signal to a cross-connect matrix that connects the independent low data rate test signals to the communication network. The cross-connect system then receives the independent low data rate test signals from the communication network into the shared test port. The cross-connect system transmits the high data rate test signal from the shared test port to the test system. The test system separates the high data rate test signal into the independent low data rate test signals.

Abstract: An arrangement and a method for testing a telecommunications circuit over Dense Wavelength Division Multiplexing (DWDM). A transmitter, which is optically coupled to the circuit, transmits a test-drive signal on the circuit. Through a network, a performance of the circuit is monitored at points along the circuit based on the transmitted test-drive signal.

Abstract: An arrangement and a method for testing a telecommunications circuit over Dense Wavelength Division Multiplexing (DWDM). A transmitter, which is optically coupled to the circuit, transmits a test-drive signal on the circuit. Through a network, a performance of the circuit is monitored at points along the circuit based on the transmitted test-drive signal.

Abstract: A system for testing a communication network includes a test system and a cross-connect system. The test system generates a plurality of independent low data rate test signals with first data rates. The test system combines the independent low data rate test signals to generate a high data rate test signal. The test system then transmits the high data rate test signal from the test system to a shared test port. The cross-connect system transfers the high data rate test signal to a cross-connect matrix that connects the independent low data rate test signals to the communication network. The cross-connect system then receives the independent low data rate test signals from the communication network into the shared test port. The cross-connect system transmits the high data rate test signal from the shared test port to the test system. The test system separates the high data rate test signal into the independent low data rate test signals.