Page 395 of 1814International ISDN PRI Feature description and administration398Call Connection RestrictionContentsThe following are the topics in this section:Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397Feature descriptionThe Call Connection Restriction product improvement allows limitingconditions to be placed on call connections across the ISDN. Callconfigurations which would degrade transmission integrity or networkperformance are prevented.The following conditions are placed on network call connections:• No more than one trunk without disconnect supervision can be used in acall connection. Otherwise, trunk lock-up could occur within thenetwork. (This also applies to call-joined connections. Two callconnections cannot be joined if each makes use of a trunk withoutdisconnect supervision.)• Tandem nodes are limited, to prevent potential transmission problems.The maximum number of tandem nodes to be allowed in a callconnection can be set between 0 and 31, by way of service change.
