NEC SV8300 ANALOG TRUNK PROGRAMMING

[FELIPEF]

hI i'm working on a sv8300 with only analog trunks and extensions.
im new at it. i need to know what to program in order to be able to make outside calls . i have CMD200 ok, CMD8A ok, because when i dial the number i see the red led in the 4COTA trunk blade. but after a few secs i lose the call. im guessing is something in CMD 3000 AND 3500.
thanks in advance​

 

[PFD45]

Did you set CM 855 for maximum number of digits?

 

[neax]

Check:

3500 should be 00
3509 should be 15
3520 should be 15