I'm a Notel/Avaya guy who got roped into an NEC Electra 120.....

I've got a customer that was given an Electra 120. They would like to be able to dial 9 to grab 1 of the 8 COs to dial out on. Seems simple enough. Here's what was done:

I verified the 1 digit access code which grabs Trunk Group 1, I also verified that Trunk Group 1 contains CO1-8. Line Key selection is Telephone Mode and Line Key Selection for Telephone Mode is setup for line buttons TRK GRP 01.

However, when dialing a 9, the screen displays "error" and you get a fast busy. I know I'm missing something ridiculously easy.

Any help would be appreciated.