Specifications

Operating Modes
2-11
• When calls have been successfully connected.
• Whether the dial line is connected or disconnected.
• Call progress information (ringing, busy signal) when the DAP is connected to
Sprint's Enhanced Switched 56 Service.
Call Establishment
When the dial backup connection is initiated and automatic dial is enabled on the
originating DAP, the answering DAP's primary telephone number is dialed. When
automatic dial is disabled, you may manually dial the DAP's primary or any of its four
alternate telephone numbers.
Call Answering
When automatic call answering is enabled, the DAP answers incoming dial line calls in
response to one of the following user-selectable conditions:
• Always - the DAP always answers calls.
• DDS Line or Local Loop Down - the DAP only answers calls when the DDS
line goes down (due to Out of Service codes, Abnormal Station codes, loss of
multiport framing, or loss of network framing) or when an invalid DDS signal is
received from the network.
• No Signal - the DAP only answers calls when an invalid DDS signal is received
from the network.
The DAP constantly monitors the dial line for a ringing signal. When ringing is detected,
the DAP automatically answers the call in response to the selected condition. When the
dial backup connection is successfully established, the DAP displays the message
Switched To Dial on the front panel followed by an audible beep. When automatic
answering is disabled or when the selected condition is not present, the DAP informs the
front panel that ringing is detected, but it will not answer the call.
Call Disconnection
Dial line calls can be disconnected automatically or manually. When automatic call
disconnection is enabled, the DAP disconnects the dial line and switches data
transmission back to the dedicated line when the Data Terminal Ready (DTR) signal
from the port's DTE goes Off.