AASTRA 53i Guia Da Instalação

Model 57i CT IP Phone Installation Guide 29

Other Phone Features (57i CT Base Unit)

Adjusting the Volume

Pressing the volume button 

 adjusts the receiver, headset, 

speaker, and ringer volume.
• To adjust the ringer volume, leave the handset in the cradle and press 

the volume button 

 while there is no active call. There are 10 

settings for the ringer including Off — the display will temporarily 

indicate the current ringer volume setting.

• To adjust the handset volume, lift the handset and press the volume but-

ton 

while the handset is off hook. The handset will remain at 

this volume until it is adjusted again.

• To adjust the headset volume, press the volume button 

while 

the headset is activated (activate the headset by pressing 

; ensure 

headset audio mode is set). The headset will remain at this volume until 

it is adjusted again.

• To adjust the speaker volume, press the volume button 

while 

the speaker is activated (activate the speaker by pressing 

; ensure 

handsfree speakerphone audio mode is set). The speaker will remain at 

this volume until it is adjusted again.

Status Lights (LEDs)

The speaker LED, beside the 

 key, and the Message Waiting 

Indicator (MWI) LED, on the top right of your phone, provide visual 
indications of your phone’s status.

Speaker LED

Message Waiting Indicator (MWI)

Call Timer

• When you make or answer a call, the Timer shows the elapsed time of 

the call.

Speaker LED Status Description
ON solid

Indicates a call is on Handsfree (speakerphone)

Slow Flash

Indicates you are using the headset.

Rapid Flash

Indicates the call is muted. Press 

 to take the 

call off mute.

MWI LED Status

Description

Slow Flash

Indicates you have a message(s).

Rapid Flash

Indicates you have an incoming call.

Even Flash

Indicates one or more calls are on hold.