In the last 30 days I have upgrade 3 Option systems and Avaya formal position is the T1 must be upgrade. In fact, it held up my upgrade on one of my Option 11 upgrade for 3 months because of the back order on the T1 cards. When they arrived I had problems with the PRI card only. The non Pri-T1 worked fine it was the Pri circuits I had problems with. After working with Avaya's Tier 3 techs for 3 cut attempts and 60 hrs later I went back to the old T1 cards. I still have a tier 3 ticket pending with Avaya on this issue. Earlier this week I was speaking with another tech and he also had the same issue. He informed me it is now a know issue and pending patch.
This might not be your issue would need more information about the current version and card version


DataElectric-Avaya/FL Gov, SMB & Enterprised Partner
www.edataelect.com