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Bill and keep (B&K or BAK),also known as net payment zero (NPZ), is a pricing arrangement for the interconnection (direct or indirect) of two telecommunications networks under which the reciprocal call termination charge is zero. That is, each network agrees to terminate calls from the other network at no charge. According to the OECD, Bill and Keep is defined as "A pricing scheme for the two-way interconnection of two networks under which the reciprocal call termination charge is zero - that is, each network agrees to terminate calls from the other network at no charge".〔http://stats.oecd.org/glossary/detail.asp?ID=6727〕 Bill and keep represents a modern approach to interconnection charging in which the networks recover their costs only from their own customers rather than from their competitors. Such an arrangement acts to remove the wholesale cost barrier to the retail pricing for off-network calls and has been proven to result in significantly higher levels of calling activity. On October 27, 2011, the U.S. Federal Communications Commission (FCC) announced that it would adopt a bill-and-keep framework for all telecommunications traffic exchanged with local exchange carriers (LECs) as part of an effort to reduce arbitrage practices such as traffic pumping and phantom traffic, encourage the deployment of IP-based networks, and reduce artificial competitive distortions between wireline and wireless carriers.〔("Connect America Fund Executive Summary" ), 2011-10-27. Retrieved on 2011-10-28.〕 In the European mobile telecommunications sector, absent a bill and keep arrangement, the wholesale markets have traditionally applied the calling party pays (CPP) principle in which an originating network pays the terminating network a charge called the mobile termination rate (MTR) or fixed termination rate (FTR) for calls to the terminating network. The MTRs paid under the CPP model, therefore, act as a cost floor to the retail pricing, preventing lowering of prices and innovation of retail propostitions. In many countries including the UK, the CPP model has thus led to a high level of regulatory activity aimed at capping the MTRs at a competitive level, which inevitably acts to reinforce the cost floor rather than being pro-competitive. Although Bill and Keep has gained momentum, some drawbacks have been identified with this model, such as issues related to the quality of service offered to the end user.〔("Bill and Keep Alternatives" ), ''TM Forum'', 2008-09-05. Retrieved on 2009-07-06.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bill and keep」の詳細全文を読む スポンサード リンク
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