ITU D.151:1988
ITU D.151:1988 Old System For Accounting In International Telephony
Table of Contents
1Introduction2Callsoverdirectintercontinentalcircuits
3Callsoverachainofintercontinentalcircuits
4Callsextendedovercontinentallandlines
(thatis,usingthemasanintermediatesection)
5Similarconsiderationsmayapplytocontinental
relationsespeciallywhereradiotelephonecircuits
areused.