### DESCRIPTION

The file ` isdnd.rates` contains descriptions how long charging units last at a given time of day, day of week and the distance to the destination. If this file is available, this information may be used by the **isdnd**(8) ISDN connection management daemon to calculate the short hold time for a connection. The format of a rate entry line is as follows:

The first field, the (*rate-code*) defines a collection of rates (for each day of the week) which can be referenced in the **isdnd**(8) configuration file **isdnd.rc**(5). This field must start with the identifier "ra" followed by a digit in the range of zero to four.

The second field, the (*day-number*) selects the day of week for which this entry defines the rates, where 0 stands for Sunday, 1 for Monday and so on until the digit 6 which stands for Saturday.

The rest of the line consists of one or more space separated fields which have the following syntax:

start_hour.start_minutes-end_hour.end_minutes:charge_unit_length

Start_hour and start_minutes define the begin of a time section and end_hour and end_minutes define the end. Charge_unit_length define the length of a charging unit in the previously defined time section. No spaces or tabs are allowed inside this field. The hour and minutes specifications MUST have exactly 2 digits, in case just one digit is needed, a leading 0 must be used.

For example,

14.00-18.00:90