Avaya changed the passwords on some of the versions. If plymouth (all lower case) will not do it as you indicated, this is a lower level login, the daimler password should. I know the daimler password is for firmware 34. You have Firmware 32 but I suspect it is the same. This one should get you in. When you are at the command prompt type in "?" and you will see a list of the commands avaliable. quit will get you out.
Chris