This EN defines a frame substitution and muting procedure which shall be used by the Receive (RX) Discontinuous Transmission (DTX) handler when one or more lost speech or Silence Descriptor (SID) frames are received from the Radio Sub System (RSS). The requirements of this EN are mandatory for implementation in all GSM Base Station Systems (BSS)s and Mobile Stations (MS)s capable of supporting the enhanced Full Rate speech traffic channel. It is not mandatory to follow the bit exact implementation outlined in this EN and the corresponding C-source code.
EN 301 246-1997由ETSI - European Telecommunications Standards Institute 发布于 1997-08-01,并于 2014-04-25 实施。
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