I am trying to use a Lucent Definity prologix station extention for trunk lines into a 8x24 with centrex software. The norstar is setup with a dn length of three but the lucent system is set up with the dn length of four. Will this cause me any trouble. Also I am not sure if I need to use centrex software or DR5 for this to work. By having the lucent extentions the customer will still have to dial 9 as for this is what is set up in the lucent switch. Has anyone done this before and could give me some advise on what I should watch for or any tips. Thanks