摘要:
Fraudulent VoIP calls are detected and blocked by automated procedures performed at a router server in the VoIP service provider's system which, usually, just analyzes call requests and sets up a route between the calling and called parties. The stringency of automated fraudulent call detection and blocking processes is based on calling customer credit worthiness and the destination of the call.
摘要:
Fraudulent VoIP calls are detected and blocked by automated procedures performed at a router server in the VoIP service provider's system which, usually, just analyzes call requests and sets up a route between the calling and called parties. The stringency of automated fraudulent call detection and blocking processes is based on calling customer credit worthiness and the destination of the call.
摘要:
A communication network system for monitoring data traffic is disclosed, in which at least one switch serving as an intermediary to a plurality of data input streams and a plurality of data output streams; a capture server in communication with the switch; and a data acquisition control engine operable to receive data acquisition instructions from a user and cause the received instructions to be implemented at the switch.
摘要:
A communication network system for monitoring data traffic is disclosed, in which at least one switch serving as an intermediary to a plurality of data input streams and a plurality of data output streams; a capture server in communication with the switch; and a data acquisition control engine operable to receive data acquisition instructions from a user and cause the received instructions to be implemented at the switch.
摘要:
A system and method that may include placing a first telephone call from a data network to a target phone number using a trusted carrier; recording the first telephone call in a reference audio data file; placing a second telephone call from the data network to the target phone number using a suspect carrier; recording the second telephone call in a test audio data file; and comparing the test audio data file to the reference audio data file.
摘要:
A system and method that may include placing a first telephone call from a data network to a target phone number using a trusted carrier; recording the first telephone call in a reference audio data file; placing a second telephone call from the data network to the target phone number using a suspect carrier; recording the second telephone call in a test audio data file; and comparing the test audio data file to the reference audio data file.
摘要:
A method for forming an acoustical stack for an ultrasound probe comprises partly dicing a single crystal piezoelectric material to form single crystal pieces that are partly separated by a plurality of kerfs. The single crystal piezoelectric material comprises a carrier layer. The kerfs are filled with a kerf filling material to form a single crystal composite and the carrier layer is removed. At least one matching layer is attached to the single crystal composite, and dicing within the kerfs is accomplished to form separate acoustical stacks from the single crystal composite.
摘要:
The invention uses a transducer and ultrasound system to form and direct ultrasound beams through the blood stream that will detect the Doppler shift in frequency between the beams and the return echo off the blood. The transducer can be secured onto the surface of the patient's skin with a transducer housing holder. A 1-D transducer, subject to an optimized angle with respect to the blood vessel, will generate and direct ultrasound beams electronically through a blood vessel below the skin and analyze the received echo, searching for the maximum signal amplitude of the Doppler frequency shift from the blood. Furthermore, the device continuously controls the direction of the ultrasound beams to achieve maximum return signal amplitude. Then, the condition and trend of the blood flow is recorded and displayed continuously over the desired diagnostic interval the device is in use.
摘要:
A method for forming an acoustical stack for an ultrasound probe comprises partly dicing a single crystal piezoelectric material to form single crystal pieces that are partly separated by a plurality of kerfs. The single crystal piezoelectric material comprises a carrier layer. The kerfs are filled with a kerf filling material to form a single crystal composite and the carrier layer is removed. At least one matching layer is attached to the single crystal composite, and dicing within the kerfs is accomplished to form separate acoustical stacks from the single crystal composite.