Topics Map > Communication and Collaboration > Lync / Skype for Business
Skype for Business, Make and receive calls
On this page, you can learn how to make, transfer, leave, or hold a phone call using Skype for Business on your desktop or mobile device.
To call a contact using Skype for Business, select the contact and select the phone button. Then choose one of the following options for the call:
Work: to call the contact at a work number
New Number...: to enter a different number to call that person
Skype for Business Skype call: to call the contact in Skype for Business
Voice mail: to call the contact’s voice mail
After the call connects, use the mic button at the bottom of the window to mute / unmute yourself 
, and the handset button to end the call 
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Use the other call controls as appropriate:
Select the Call Controls button 
for the following options:
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Hold
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Transfer to another number or person.
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Devices to switch to a different device.
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Dial pad to interact with an automated phone system, such as entering a code, when you call your voicemail, or make a selection when you call an office reception desk.
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Speaker volume to adjust the sound. Slide the pointer left or right to control volume, or select the speaker icon at the top of the volume control to mute your speaker.
Select the Video button to add video to a Skype for Business call.
Select the IM button to add instant messaging to a Skype for Business call.
Select the Participants button to invite other contacts to join the call.
Use the Dial pad
If your Skype for Business account is enabled for Enterprise Voice, can use the dial pad to call a phone number from Skype for Business.
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From the main Skype for Business screen, click the Dial Pad tab.
The Dial Pad appears just below.
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Enter a phone number in one of the following ways:
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Select the number buttons on the Dial pad.
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Type the number on your keyboard.
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Paste the number if it is already copied to the clipboard.
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Select Call.
After the call connects, use the mic button at the bottom of the window to mute / unmute yourself, and the handset button to end the call.
Receive a call
When a contact calls you, a notification displays on your screen. To answer the call, select the notification.
If you don’t want to accept the call, select Decline to dismiss the call and send it to voice mail, if available.
Answer audio and video calls on a locked device
On a mobile device (e.g. cell phone with the Skype for Business App installed), you may answer audio and video calls quickly without having to unlock your device and login. When someone calls you, a call alert pops up on the locked screen. Click the appropriate button to answer with video or audio.
If you need to login to your device in the middle of the conversation, select the Unlock button on the lower left side of the call window.
NOTE: It is possible to answer calls on locked IP Phones. If you need to log in during the conversation to perform an action (e.g. transfer the call), select the unlock button and log in.
See Also
Start a Skype for Business conference call
Make and receive a Skype for Business video call
Transfer a Skype for Business call