Skype for Business, Phone Numbers and TTY

On this page, you can learn how to change phone numbers and use a text telephone (TTY).

Use the Skype for Business – Options > Phones dialog box to set up or change settings for any phones you use Skype for Business.

Add or change phone numbers

Your phone numbers show up on your contact card and are visible to your contacts, depending on the permission you choose when adding them.

  1. Under My phone numbers click a box and type your number. Use only the digits 0123456789, and no parentheses or hyphens. When adding international numbers, type the + sign, then the country code followed by the local number.
  2. Check the boxes next to the numbers that you want to show on your contact card.

Use a Text Telephone (TTY) with Lync/Skype for Business Software

Text telephone (TTY) mode is used for text communication over a telephone line. A TTY device must be connected to the computer to interpret the modified audio; otherwise you might experience poor audio quality during the call. Using TTY mode in a conference call may also cause audio quality issues.

TTY mode is turned off by default. To turn on the feature:

  1. Connect a TTY device to your computer.
  2. Click Turn on TTY mode, under Phone accessibility.
  3. Sign out of Skype for Business, and then sign back in.

Use a Text Telephone (TTY) Lync Phone Edition Hardware

Text telephone (TTY) mode is used for text communication over a telephone line. A TTY device must be connected to the computer to interpret the modified audio; otherwise you might experience poor audio quality during the call. Using TTY mode in a conference call may also cause audio quality issues.

TTY mode is turned off by default. To turn on the feature:       
  1. From the Lync Phone Edition phone's (e.g. Polycom CX600) Home Screen, press the Menu key
  2. Use the Up & Down Arrow Keys to select Settings
  3. Use the Up & Down Arrow Keys to select “Text Telephony (TTY)
  4. Press the OK or Left Select Key to enable TTY
  5. To disable TTY, repeat steps 1-4.