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There are some minor hardware differences between the devices, even though all handsets have a similar design. The following list presents an overview of Infinity 577 handset, which includes all the main hardware features for the handsets.

Note: Infinity 277 has 4 extra programmable keys, also called Function keys, placed below the keypad.

	1	Earpiece Speaker
	2	Screen
	3	Navigation keys	Up/Down/Right/Left
	4	Selection key	Confirm or select an option.
	5	Off-hook key	Answer a call. Use as a shortcut to the Call list.
	6	On-hook key	End a call. Return to the previous menu. Switch the handset on/off by long press.
	7	Menu Key	Enter the main menu of the handset.
	8	Speaker Key	Enable/Disable speaker mode during a call. NOTE: If enabled during a call, the speaker key will light up in red and the sound will come from the speaker on the back of the handset.
	9	Softkeys	Used for different commands in the various menus of the handset, which change according to what is displayed on the screen.
	10	LED	Indicates incoming call, missed call, messaging, low battery and charging.

	11	Headset connector (3.5mm)	Slot used for connecting a headset. The connector is protected against dust by the headset connector cover.
	12	Volume Up Key (Side Key)	Increase the volume during a call.
	13	Volume Down Key (Side Key)	Decrease the volume during a call. NOTE: The volume buttons are used to control the volume when using the earpiece, a headset, and the loudspeaker. The lowest volume level will not mute the handset.
	14	Mute Key (Side Key) / Push-to-talk (PTT) key	Turn Off/On the microphone during a call. If the handset is in idle and the button is pressed, it will activate the PTT function.
	15	External Speaker	Used when speaker mode is enabled in a call.
	16	Battery
	17	Alarm Key	Supported only with Infinity 577

Keypad

The image below illustrates the available characters on the handset’s keypad. Depending on the selected menu language, other characters can be available. Therefore, the character order can differ from the one below.

Number input mode

When in idle, a short key press enters the digits “0” – “9” and the characters “*” and “#”.

A long key press on “0” generates a “+”.

Text input mode

When writing a text, a short press on keys “0” – “9” displays the first available character on that specific key. By pressing the “*” key it is possible to change the letter input to upper/lower case or only a numeric value (Abc, abc, ABC, or 123).

Use the “0” key to add a space in the text.

Key Features

Power On and Off

Long press the On-hook key to power ON/OFF the handset.

Key lock

The keypad can be locked/unlocked by long pressing the “*” key in idle. This feature can prevent accidentally pressing keys and making a call.

NOTE: It is possible to answer/reject an incoming call while the keypad is locked

Silent mode

The silent mode feature can be activated/deactivated by long pressing the “#” key in idle. When enabled, the handset will turn to silent mode and a “Sound Off” icon will be displayed in the status bar.

NOTE: When this mode is enabled, it is possible to switch on/off the vibrator on the handset in Settings > Audio Settings > Vibrator. Please note, that all other audio settings will be greyed out while the handset is in silent mode.

Message Waiting Indicator

When there is a new message in your voicemail box, the LED indicator starts flashing green. To access your new message(s), long press the number “1” key. The handset will automatically dial your voicemail box.

Call List

There are 3 ways to access your call history:

1. Press the green Off-hook button when idle.
2. Press the right softkey.
3. Press the Menu button and navigate to Calls.

Contacts

There are 2 ways to access your local Contacts:

1. Press the left softkey when idle.
2. Press the Menu button, select Contacts.

From the Contacts page, you can: Call, Edit, Edit before call, Add, Delete, Delete all contacts or assign Speed dial key.

If the contact has more than one number available (work, home, mobile, etc.) a small arrow appears to the right of the contact. Pressing the navigation key to the right will toggle between the different numbers.

To add a Contact from Call List:

1. From Call List, scroll to the desired number.
2. Select More
3. Select Save as contact

To add a new contact manually:

1. From Contacts, select More
2. Select Add contact
3. Edit the Name
4. Select and edit the number for Work / Mobile / Home
5. Select Save

Speed Dial Key

Any key from “2” – “9” can be set as a speed dial key – a shortcut to calling any contact in the contact list, or in the F-Key list. A long press on any of these keys, while the handset is in idle, will call the assigned contact.

A contact can only be assigned to one speed dial number at a time. The first defined number for the contact will be dialed when the speed dial key is pressed. This means that if all numbers (work, mobile, home, and other) are defined for the contact, then the work number will be dialed first. If the work number is not defined, then the mobile number is dialed, and etc.

To assign a contact to a speed dial key:

1. Access the Contact list.
2. Navigate to the desired contact.
3. Select the More softkey
4. Scroll down and select Speed dial
5. Navigate to the desired key entry, press the Add softkey.

Making and Answering Calls

To make a call from idle simply enter the phone number from the keypad and press the Off-hook key.  To answer a call simply press the Off-hook key.  

Function Keys

Infinity 277 has 4 extra keys (F1,F2,F3 and F4) at the bottom of the keypad. These function keys can be configured as a speed dial key or as a shortcut to a menu function.

To program a function key:

1. Press the Menu key, select Settings, scroll down and select Function keys.
2. Scroll to the desired Function key and Select.
   
3. There are 3 options. The first option is to Ignore key press, turn this ON to disable this key. The second option is Speed dial and the third option is Shortcuts.
   
4. If Speed dial is selected, in the next screen you can select the desired Contact to assign to this function key.
    
5. When done, press the red On-hook button to exit all the screens.