In conjunction with IP Office 1.3 software, the following hardware is now supported:
• IP412 control unit plus the following supporting modules:
• Dual E1 and Dual T1 modules.
• E1-R2 Line Modules
• ATM4 EN, ATM16 EN, ATM4 NZ and ATM16 NZ Line Modules.
• 4602 telephone.
This is from the release notes 1.3 or greater
Key programing
The A B keys relate to digital telephoney 1 and 2 in the user tab.