I have Cisco 3845 with VWIC2-1MFT-T1/E1 card. I would use this card for ISDN backup (data traffic).
When I put pri-group timeslots 1-31 on interface controller e1 0/1/0 I got an error:
% Not enough DSP resources available to configure pri-group on controller E1 0/1/0
% The remaining dsp resources are enough for 0 time slots.
% For current codec complexity, 2 extra dsp(s) are required to create this voice port.
So, is it possible to configure ISDN data backup with this card and how?
On the branch office I have WIC-1B-S/T V3.