ITU Q.511:1988
ITU Q.511:1988 Exchange Interfaces Towards Other Exchanges
Table of Contents
1General2ScopeofRecommendation
3Characteristicsofdigitalinterfacestowardsother
exchanges
3.1InterfaceA
3.2InterfaceB
4Characteristicsofanalogueinterfacestowardsother
exchanges
4.1InterfaceC