[Asterisk-Users] broken message waiting indicator on Polycom IP600?

[Louis-David Mitterrand]

Hello,

I faithfully followed the instructions from:

http://www.voip-info.org/wiki-Getting+MWI+on+Polycom+Phones+to+work+with+Asterisk

but still the message waiting indicator doesn't flash when a message is
waiting. There is a brief intermittent chirp but nothing more.

Using latest firmware 1.4.1

Thanks for your suggestions,