I have a situation where staff in an office need to be able to dial *57 on a Mitel 5300 series phone, where *57 is a telco vertical service code (VSC) not a Mitel feature code.
I've tried manually dialing 9 (for an outside line) and then *57 but the phone gives me a fast busy. I've also tried programming a system speed call to dial *57 as well as 9 *57, but in both cases the system gives me a fast busy.
How do you set something like this up on a Mitel 3300 MXe II running software version 5.0?