For analog phones, the system supports a variety of analog message waiting indication (MWI) methods. The method used for an individual analog extension is set for the Extn | Analog | Message Waiting Lamp Indication Type field. Those methods are
101V
51V Stepped
81V
Bellcore FSK
Line Reversal A
Line Reversal B
None
On
The 101V method is only supported when using a Phone V2 expansion module.
81V is typically used in European countries. 51V Stepped is used in most other countries. However the actual method used for a particular model of analog phone should be confirmed with the phone manufacturer's documentation.
The Message Waiting Lamp Indication Type field also provides options for None (no MWI operation) and On. On selects a default message waiting indication method based on the system locale.
'On' Method |
Locale |
81V |
Belgium, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Netherlands, Norway, Poland, Portugal, Russia, Saudi Arabia, Sweden, Switzerland, United Kingdom. |
51V Stepped |
Argentina, Australia, Brazil, Canada, Chile, China, Colombia, Japan, Korea, Mexico, New Zealand, Peru, South Africa, Spain, United States. |
For the United Kingdom system locale (eng), the default Caller Display Type (UK) allows updates of an analog phone's ICLID display whilst the phone is idle. The system uses this facilities to display the number of new messages and total number of messages in the users own mailbox. This feature is not supported with other Caller Display Types.
