Hi, you have 1 of:
That is enough for 4 calls, meaning 2 x ISDN BRI, but you have four ports of this kind currently installed.
Then you have:
1 x PVDM-12=
But that is the wrong type for a 1760, and is not supported, see:
- Remove PVDM-12 in internal slot 1
- Remove VIC-2BRI in either slot 2 or slot 3.
And you should be able to call. To use the additional BRI ports, you need to obtain another PVDM-256K-xx
Hope this helps, please rate post if it does!