Continuous flashing of Msg/Calls light on my office telephone

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You apparently have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system takes messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages from calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

I do not deal with your system but I see similar problems in other phone systems. This MAY be what is happening...

 

The message light can be a voice mail indicator OR someone on another phone in the building can leave you an intercom message (no voice system used or required). In those cases you need to return the message by pressing the MSG button, this should make the phone ring that left you the message in the first place. That phone needs to be answered to return the message and cause your light to stop flashing.