Page 543 of 1814International ISDN PRI Feature description and administration544Digital Trunk Interface and Primary RateInterface Time Slot ReuseContentsThe following are the topics in this section:Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544Feature descriptionThis feature eliminates call blocking due to unavailable time slots. Thisfeature allows a time slot reserved for a primary function to be reused for anysubsequent requirements during call processing. Therefore, all channels onDigital Trunk Interface (DTI) or Primary Rate Interface (PRI) loops areavailable for use.Time slots reserved for a particular DTI or PRI channel are stored in anunprotected data structure allowing easy access, such as a call register. Eachtime a new path is required for the same DTI or PRI channel, the datastructure can be accessed to determine if there is a reserved time slot that canbe reused. If the new path is intra-group (single-group switch), the time slotcan be reused. If the new path requirement is inter-group (multi-groupswitch), the reserved time slot can be reused if a matching junctor slot isavailable.
