Nortel 1000 Description, Installation And Operation Manual page 419

Provisioning IP Trunk 3.01 (and later) in OTM 2.1 (and later)
Figure 109
Delete an IP trunk card from a node
Note: Leader 0 and Leader 1 cannot be deleted if there is still a Follower
card in the node. Leader 0 cannot be deleted if there is still a Leader 1
card in the node.
End of Procedure
IP Trunk Description, Installation, and Operation
Page 419 of 644