DBS 576 Voice Prompts on Voicemail not working internally

[TECHPET]

If I call in from the outside I hear all the prompts, but internally when you call from an extension and get into voicemail, it is silent (it works, but users without screens don't much appreciate it). I cannot find a setting for this in the 30lbs of documentation, yes I RTFM
Could the internal group configuration be affecting this?

 

[cwc3]

yes

 

[delrossi]

In Mailbox setup Uncheck The display block