The Skype for Business – Options > Phones window is where you set up or change settings for any phone you plan to use with Skype for Business.
Add or change a phone number
Add phone numbers to your contact card to give people a way to reach you when you’re not at your computer, or in case they prefer to use a phone. Your phone numbers show up on your contact card and are visible to your Skype for Business contacts based on the privacy relationship they have with you.
In the Options dialog, under Phones, click the box for the type of number you want to add or change, and type the 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.
To make this number visible to contacts, select the Include in my contact card check box next to the number.
Your number will be visible as follows:
Work Phone is visible to all contacts except your External Contacts and Blocked Contacts.
Note: Some companies don't allow you to clear the Include in my contact card check box for your work phone.
Mobile Phone is visible only to your Workgroup and Friends and Family.
Home Phone is visible only to your Friends and Family.
Other Phone is visible only to your Friends and Family. Use this option to add or modify additional numbers, like for a temporary office or an alternate cell phone.
Tip: To see which of your contacts have each of these relationships with you, in your Contacts list, select the Relationship tab. Contacts are grouped there by privacy relationship. To change the relationship you have with a contact, right-click the contact listing, and then click Change Privacy Relationship.
Use a TTY device
Note: TTY mode may not be available in your region or with your service.
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 this feature:
Connect a TTY device to your computer.
Under Phoneaccessibility, select Turn on TTY mode.
Sign out of Skype for Business, and then sign in again.