AT&T MERLIN LEGEND Release 2.0 Programming Summary Manual page 170

Auxiliary Equipment
Only one Music-on-Hold jack is allowed per system.
You cannot assign the trunk identified for Music-on-Hold to a trunk pool. If the
trunk is currently assigned to a pool, you must remove it before you program
this option.
You cannot assign the trunk identified for use with Music-on-Hold to a button
on any telephone or as a Remote Access trunk, and you cannot use the jack
identified for Music-on-Hold for a loudspeaker paging system or maintenance
alarm.
Summary: Music-on-Hold
Programmable by
Mode
Idle Condition
Planning Form
Factory Setting
Valid Entries
Inspect
Copy Option
Console Procedure
PC Procedure
10-2
Music-on-Hold
System manager
All – but in Hybrid/PBX mode, the trunk designated for
Music-on-Hold cannot be assigned to a trunk pool.
System idle
Form 2c, System Numbering - Trunk Jacks
Not Applicable
Line/trunk number
No
No
AuxEquip MusicOnHold
Enter Exit
[F9] [F1] Type trunk no.
Dial trunk no.
[F10] [F5]