Nortel E1 Activation

recently, i take my actual examination
regarding the activation of E1 for nortel
PABX (option 61) from the company i applied. and it sad
to say that i failed.

Is there anybody, could tell me what are the
hardware (circuit packs) i will use? overlay programs? software
release? and the testing of E1.

Thanks, and i hope i could do this once they
call me up again.