Service Description
The user can accept a call from a 3rd party
while engaging in an active call. The SPA shall
alert the subscriber of the 2nd incoming call by
playing a call waiting tone.

User Action Required to Activate or Use
If the you choose to answer the second call
either:
Press and release your phone's switch hook
(the button you release when you take your
phone off the hook) or
Press the flash button (if your phone has one).
This puts your first call on hold and
automatically connects you to your second call.
To put your second caller back on hold and
return to your first caller, press the switch hook
or flash button again. (You can alternate
between calls as often as you like.)

Expected Call and Network Behavior
If the user is on a call when another call comes
in they will hear a series of beeps / tones
alerting them to the second call. The person
calling will hear normal ringing.