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Intel® IXP400 DSP Software V2.6.2: Specification1.0 Product ContextIntel® IXP400 DSP software V2.6.2 provides basic voice-processing functionality for voice-over-IP (VoIP) applications using the IXP421, IXP423, and IXP425 network processors.2.0 Product SpecificationsIntel® IXP400 DSP software V2.6.2 offers the following general product features:• ITU T.38 Fax Relay— V.17 at 14400, 12000, 9600, and 7200 bps fax modulation and demodulation— V.21 at 300 bps fax modulation and demodulation— V.27ter at 4800 and 2400 bps fax modulation and demodulation— V.29 at 9600 and 7200 bps fax modulation and demodulation• 128-ms echo cancellation• Selectable (either HSS or External PCM Interface) front-end Pulse Code Modulation (PCM) interface• Maximum eight voice channels when using G.711 for 533 MHz processor• ITU-T compatible voice coders:— G.729ab with VAD and CNG support— G.711 μ-law and A-law CODEC with 10-ms frame size— G.711 Annex 2. Support for VAD and CNG— G.723.1 with 5.3 and 6.3 Kbps rates and VAD and CNG support— G.722— G.726 with 16, 24, 32 and 40 Kbps rates and FRC3551 and I.366 Annex E packing formats— 24 for G.729Read the full Intel® IXP400 DSP Software V2.6.2 Specification.
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