AMBS-PMT-TOT-AMT-DUE   -包括往期没还清的

AMBS-PMT-CURR-DUE是单单这一期新欠的

AMBS common used fields:

AMBS-BILLING-CYCLE

AMBS-DATE-LAST-STMT

AMBS-DATE-NEXT-STMT

AMBS-DATE-PMT-DUE

AMBS-INT-STATUS

03  AMBS-INT-STATUS     PIC X.

88  AMBS-IS-NEW                     VALUE 'N'.

88  AMBS-IS-ACTIVE                  VALUE 'A' 'F'.

88  AMBS-IS-DORMANT                 VALUE 'D'.

88  AMBS-IS-ACTIVE-NO-FRAUD         VALUE 'A'.

88  AMBS-IS-NORMAL                  VALUE 'A' 'D' 'I'

'N'.

88  AMBS-IS-CGOFF-NORMAL            VALUE 'Z'.

ATPT refresh every cycle

AMSS 是还没出账单的，AMSL是已经出了账单的