【资料名称】：TrFO and TFO in M-MGw R4

【资料作者】：爱立信

【资料日期】：08年

【资料语言】：英文

【资料格式】：PPT

【资料目录和简介】：

TFO
TFO is based on inband signaling, which means that TFO can perform codec negotiation between different networks
TFO requires always 64 kbps transmission path
TFO is valid mainly for TDM transport, but is supported also for PCM coded speech on ATM and IP transport
TrFO
TrFO is based on Out of Band Transcoder Control (OoBTC) negotiation, i.e. its usage is limited mainly to one CN only
TrFO link requires bandwidth only for compressed speech (+ protocol headers), i.e. less bandwidth is required
TrFO is valid for ATM and IP transport