This section should be read with the Customer Service Guarantee Scheme in BT's Terms & Conditions offor Contract for Access Service for Business Service or BT's terms and conditions for residential service as appropriate. The Scheme covers PSTN, ISDN2/2E, BusinessFeatureline Highwayand (BusinessFeatureline HighwayCompact, hasIn beenContact withdrawnPlus, fromPayphone newLines supply with effect from 10 April 2006 and AnalogueBT DDI,Basic. Some Lowservices Lossmay Exchangebe Lines,partly Outcovered ofby Areathe ExchangeCustomer LinesService Guarantee and these are dealt with effectin fromSection 31/12/06), ISDN2/2E, ISDN30 channels, Low Loss Exchange Lines, Out of Area Exchange Lines, Featurelines and Featureline Compact, In Contact Plus, Payphone Lines and BT Basic. Some services may be partly covered by the Customer Service Guarantee Scheme and these are dealt with in Section 49 Part 5 The Customer Service Guarantee Scheme does not apply to any service that is not expressly included in this document.