an add on module and sidecar is slange, not in the book..
i find the cause of every err80 that hits my screen.. if you program a set as a 2008 and plug in a 2616.. you press any key past 7 you get an error 80.. those can be a bad set, a stuck key etc.. ERR080 128 0 14 12 172, that one about 8:30 this morning was caused by sharing a cup of coffee with a 3904... the 172 gives that away.. since the 04 does not usually have that many keys, the switch saw several depressed together... replaced the set, billed the end user..
i never recogmend ignoring any error codes.. that was not really the reason nortel sent them to the screen.. but the good news is if you ignore enough of them, nortel will fix a lot of them with a free ini...
john poole
bellsouth business
columbia,sc