Question 21/XVIII - Vocabulary for ISDNs Considering (a) existing Recommendations on terminology; (b) the ongoing need to have a consistent vocabulary for digital networks and ISDNs; the following should be studied: 1. What further terms and definitions should be recommended for ISDNs and associated digital network aspects? Note 1 - Consistency with Recommendation G.701 should be maintained. Note 2 - Consistency with the IEV is desirable. Note 3 - Due consideration should be given to corresponding terms and definitions in all of the CCITT working languages. Note 4 - Alignment of vocabulary included in Recommendations I.430, I.431, G.960, G.961 with existing vocabulary Recommendations should be ensured.