Specifications

Defining Operating Parameters
5-43
DCD Threshold
This parameter specifies the level range that incoming dial line signals must fall within to
activate the DAP's DCD signal. The normal range is 0 to -38 dBm and the extended
range is 0 to -48 dBm.
Answer
This parameter specifies the conditions that cause the DAP to automatically answer dial
line calls. You can select from the following options:
• Always - the DAP always answers calls.
• Never - automatic answering is disabled.
• 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 the 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.
The options listed above are provided with software revision number SSC0900 or above.
These revisions are compatible with previous revisions. Previous revisions only provide
the settings Enabled and Disabled. If you upgrade a unit with software revision
number SSC0839, you do not have to reconfigure the DAP. The unit will retain its
parameter settings.
You can fully configure the Answer Calls feature from a CMS 400 network management
system equipped with software revision number 4.0 or above. If it is equipped with a
software revision number lower than 4.0, configure this feature by using the WAN
Control, Excalibur Front Panel function. It is necessary to do so because an older CMS
network management system only provides the settings Enabled and Disabled. If
you configure Answer Calls from an older system, depending on the previous settings,
the Disabled selection may select Never (automatic answering is disabled) or DDown
(answer only when the DDS line is down or the local loop signal is lost). The Enabled
selection may select Alwys (always answer calls) or Nosig (answer only when the
local loop signal is lost).