Sprint Nextel 550 - Manual (Page 58)

Section 3: Using the PCS Connection Card
52 3B: Data Connections
Dormant Connection
The PCS Connection Card is “active” during PCS Vision connections
when data transmission is occurring. If data transmission over the
network stops for a period of time, the card becomes “dormant”. The
period of inactivity that causes the card to become dormant is set by
Sprint and is always less than one minute.
Note: Some programs may be unable to function on a dormant connection.
During dormant PCS Vision connections, the following icon in the
indicator area of the PCS Connection Manager window is grayed out:
When the card is in this state, you are able to make phone calls with the
card. You will not be able to transmit data (for example, you won’t be
able to browse the Web) during the phone call, but the connection is not
lost. When you end the phone call, data transmission is automatically
resumed.
When the card has an active PCS Vision connection, you cannot make
phone calls.