This Corrigendum corrects text in G.7710 Amendment 1 (7/2010) which updates the packet layer related specification of Severely Errored Second (SES) in G.7710/Y.1701 to align it with the SES definition in Y.1563. While Lost Block Count (LBC) was defined in clause 10.1.2 and included in the NPME input/output signal tables (Table 27 and Table 28), it was left out in the process description in clause 10.2.1. This corrigendum corrects the error by adding the missing 6 LBC terms to the process description.