Nortel Networks M3110 - Manual (Page 461)

Appendix E: M3110, M3310, and M3820 telephones Page 461 of 504
Telephones and Consoles Description, Installation, and Operation
• Message Waiting and Mute Indicators
• 10 Feature System Programmable keys including:
— 8 system programmable keys
— Mute key
— Speaker key
• Volume control for:
— Handset
— Ringing Tone
— Buzz Tone
— On-Hook Dialing and Group Listening
Figure 94
M3110 Meridian digital telephone