Customer has MICS 7.0 with PRI. They have 3 companies. When an employee makes a call, they want the caller ID for the appropriate company to show up at the remote end. Their telco service is able to program trunk groups on the PRI that will send out the appropriate caller ID. Problem is, we can't figure out how to put the PRI channels in different line groups on the MICS, so the employee can dial '9' or '8' and access the trunk group on the PRI that is appropriate for the call. Possible?