I have a Cortelco 8780 phone, and I can't figure out how to put it on mute when on speaker phone. Any ideas?

Asked by Heidi on 11/17/2008 2  Answers

ManualsOnline posted an answer 16 years ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here
1 1. Press key 12 speakerphone 2. Press key 11 Hold Led shoul now say 'Mute On'
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