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annotate doc/Modem-operation @ 301:4bb5772a05a3

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AT%SPVER: new command for setting custom speech version lists The speech version list in the Bearer Capability IE tells the network which speech codecs are supported by the MS, and in which order of preference. The standard behaviour is to list all codecs that are supported by the hw+fw platform, and the standard preference order is newer over older, FR over HR. But sometimes it is desirable (for network testing) to artificially restrict which codecs the test MS will declare as supported, and/or to list them in some peculiar non-standard order of preference. Add a new private AT command, AT%SPVER, allowing the user to set and clear custom speech version lists for the Bearer Capability IE composer in CC.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 21 May 2023 21:43:10 +0000
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1 FC Tourmaline stdmodem functional configuration is equivalent to Magnetite
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2 hybrid. The only intentional diff from Magnetite to Tourmaline in the modem
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3 configuration is the change of Nucleus: Magnetite uses the blob version of
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4 Nucleus which came with TCS211-20070608, whereas Tourmaline uses the source
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5 version of Nucleus by Comrade XVilka. It is essentially a change from an
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6 unknown version of Nucleus to a known one, thus it should generally be
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7 considered an improvement - but as always with such changes, extensive
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8 verification and testing needs to be done in order to ensure that nothing got
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9 broken.
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10
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11 Aside from the one intentional change of Nucleus version, FC Tourmaline is an
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12 entirely new firmware source tree, thus it is always possible that something
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13 could have got broken unintentionally, particularly in rarely-tested areas of
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14 the firmware. Therefore, extensive testing will need to be done before we can
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15 declare Tourmaline stdmodem as officially replacing Magnetite hybrid for stable
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16 modem products.