itsIfSdhSoh 1.3.6.1.4.1.2928.6.2.16.1.1.4.1.5

A string containing the values of some section overhead bytes. The byte values are on the format byte name, equal sign, byte value. The values are then separated by a single space character. I.e. the format is `S1=n SS=n M1=n B1=n B2=n'.