Information Line?

[LostTech19]

I'm new to the Mitel system and this forum so if this post is in the wrong area, I apologize in advance. I have been working with MiVoice 250 System Admin and Diagnostics within our family business for a few months now and while I'm familiar with navigating simple things, I need a little help on this one.

My goal is to be able to allow an employee to cold transfer the customer to a pre-recorded message that gives information on a specific topic. Message length is about 2-3 minutes.

After the recording, the caller receives a menu option to return to the pharmacy or terminate the call.
 
We also are using four Mitel 8528 phones and one 5330E IP phone with all phones being onsite.

[DND ON]

In theory, not a problem - this is was a Call Routing Announcement is designed to do.

However, the greeting length is going to be an issue. Whenever a greeting is playing, a voicemail port is tied up. When all ports are in use, you have no voicemail functionality: auto attendants, mailboxes, announcements, etc. will not work.

As a general rule, greetings are kept as short as possible to prevent busy ports.