Specifications

Excalibur Multirate DAP Installation and Operation
5-54
• 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 network interface for an off-hook (ringing) state.
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.
Port RTS-DCD Simulation
This parameter enables/disables V.13 RTS-DCD Simulation when dial backup
connections are established.
Parameter Thresholds
The Parameter Threshold submenu allows you to define the thresholds for five line
parameters and the Excessive Resynchronizations parameter. It allows you to set the
timers for the Lost Communication and Regained Communication alarms. It also allows
you to enable/disable the RTS/DCD antistreaming function and the DTE Power Fail
alarm for each port or shared group. Table 5-16 lists each parameter and its default
setting.
Note: It is recommended that you always set the Transmit Level to the default settings.
Table 5-16. Parameter Thresholds
Parameter Default Settings
Transmit Level - Upper Bound +15 dB, 3 sec
Transmit Level - Lower Bound -05 dB, 3 sec
Receive Level - Upper Bound -00 dB, 3 sec
Receive Level - Lower Bound -34 dB, 3 sec