Page 1265 of 1814International ISDN PRI Feature description and administration1270MSDL Idle Code SelectionContentsThe following are the topics in this section:Regional material statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1265Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1265Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1268Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1268Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1269Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1269Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1269Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1269Regional material statementThe information presented in this section does not pertain to all marketregions. Contact your system supplier or your Nortel Networks representativeto verify support of this product in your area.Feature descriptionWhen a T1 carrier is disabled at the remote end, the remote T1 or ISDN PRIhardware raises a “Red Alarm” status and sends a “Yellow Alarm,” to thelocal (near end) Meridian 1, which takes all trunks and channels out ofservice, and responds to the remote end by sending an “Unassigned PCM”(FF) code. However, some switches do not recognize the “Unassigned PCM”code, and instead expect an “Idle PCM” (7F) code.
