Transcoder Free Operation (TrFO)
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Key advantages: §Improvement of voice quality for calls between two mobile subscribers §Resources optimization in the core network by skipping thetranscoderfunctions §Transcodersaving (OPEX and CAPEX saving) §Bandwidth optimization §Delay optimization Out-of-band negotiation: §Select same codec at both ends during call setup §Supports sudden channel rearrangement(handovers, etc.) via signaling procedures §WhenTrFOimpossible, TFO can be attempted e.g. transit between packet-based and circuit based core networks |

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