I am installing an Avaya Ip office in an existing business. They do not want to change extension numbers. I can change the extensions, but I am having problems with a couple of existing extensions. I have 1 combo card 1 analog daughter trunk card, 3 ds cards. My problem is with the two analog ports. When I renumber 100-131, start 500, extension 514 and 515 are the analog ports and are number used by current ds phone users. In the old system 544 and 543 were the analog units. I have 510 and 511 open in the renumbered system. The renumber under tools will not let me renumber 510 and 511 to 514 and 515 respectively. If it would 514 and 515 would come free for analog devices. I am losing it, or just stupid. Do i have to try to renumber two or three different times. 100-108, renumber, 110-131 renumber, and change extensions...Thanks