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Additionally, some devices will act as both UAC and UAS for a single transaction; these are called Back-to-Back User Agents (B2BUAs). [1]: p20 SIP responses specify a three-digit integer response code, which is one of a number of defined codes that detail the status of the request.
Other elements of tradecraft include elicitation, surveillance and countersurveillance, photography and the emplacement of audio devices, sensors, or other transmitters. Case officers generally train agents one at a time, in isolation, including only those elements of tradecraft needed to penetrate the target at hand.
Unless otherwise stated, the status code is part of the HTTP standard. [1] The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes. [2] All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two ...
The Audio/Video Remote Control Profile (AVRCP) is often used in conjunction with A2DP for remote control on devices such as headphones, car audio systems, or stand-alone speaker units. These systems often also implement Headset (HSP) or Hands-Free (HFP) profiles for telephone calls, which may be used separately.
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A variation on selcall transmission that includes a status code is for the transmitting device to insert one or two tone periods of silence between the preceding tones and the status tone; the so-called status gap. Another variation is to prolong the status tone by another tone period; the so-called two tone-period status tone.
S/PDIF is used to transmit digital signals in a number of formats, the most common being the 48 kHz sample rate format (used in Digital Audio Tape) and the 44.1 kHz format, used in CD audio. In order to support both sample rates, as well as others that might be needed, the format has no defined bit rate .
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