NEC DS1000 Quick Setup Manual page 14

Section 1: Start-up Programming
5. Enter the access option for the selected trunk + VOL Up .
0 = No access
1 = Incoming only
2 = Outgoing only
3 = Full access (both incoming and outgoing)
6. Enter the access option for the next consecutive trunk.
Press CONF to go back to step 4 and select another trunk.
Press CONF twice to go back to step 3 and select another extension.
Press CONF three times to exit program 1803.
1-10 ◆ Section 1: Start-up Programming
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DS1000/2000 Quick Setup Guide