Identifies the allowable tolerance (measured in microseconds [sec]) prior to error correction.
NOTE 1: This field applies to asymmetrical virtual services.
USAGE: This field is conditional.
NOTE 1: Required when the BSC field on the EUSA or Transport Form is “C” and this field differs from the CDVT field.
NOTE 2: Required when the VST field is “A” or “C”.
NOTE 3: Otherwise prohibited.
DATA CHARACTERISTICS: 4 numeric characters
EXAMPLE: 5 0 0
NOTE 1: This example illustrates a numeric value but is left justified since it is treated as text.