Use the Call Waiting Feature with Xfinity Voice

Your Xfinity Voice service features Call Waiting – so you won’t have to worry about missing an important call while enjoying a conversation on the phone.

When someone calls while you’re already on the phone, you’ll hear a Call Waiting tone. If you want to answer the second call, simply put the first call on hold. And if you don’t want to answer the second call, ignore it.
You can also temporarily cancel Call Waiting so that you won’t be disturbed during important calls. Incoming calls will be forwarded directly to your voicemail. Call Waiting will automatically be restored the next time you pick up your phone.

Here's How to Use Call Waiting:

When you hear the Call Waiting tone, press and release the switch hook or Flash button on your phone.
Your first call will be placed on hold, and your second call will be on the line.
You can switch between the two calls as often as you'd like by pressing and releasing the switch hook or Flash button. Each conversation is private, and won’t be heard by the other party.
To end the first call and answer the second, simply hang up. Your phone will ring and the second caller will be on the line.
You can end either the first or the second call by having the caller just hang up.

Here's How to Temporarily Cancel Call Waiting:

Lift the receiver and listen for the dial tone.
Press *70.
Call Waiting is cancelled for the current call only.
After you hang up, Call Waiting will be active once more.

Call Waiting Guidelines

Call Waiting can interfere with fax calls and dial-up connections to the Internet.