AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 82)

Settings
BusinessPhone – Dialog 4187 Plus 82
Message Waiting Indication
Your incoming messages can be indicated by a rapidly flashing
Message key. There is a chance that the line leads are twisted after
installation (the Message Waiting LED will be on when there is no
Message Waiting signal and will go off when there is a Message
Waiting signal). To solve this problem, there are three possible
settings for the Message Waiting indication:
•
STD
This setting should be used when no Message Waiting
indication is required. This is also the default setting upon
delivery.
• MW+
Use this position when Message Waiting indication is required
and the line cabling is straight.
• MW-
Use this position when Message Waiting indication is required
and the line cabling is twisted.
At the bottom side of your phone:
Slide the switch to the required position.
Enable/Disable Program Key
You can enable or disable the program key via a switch. When the
switch is set in the Off position, programming of Dial-by-Name
keys is not is possible (i.e. the memory content is locked).
At the bottom side of your phone:
Slide the switch to the required position.