Specifications

Excalibur Multirate DAP Installation and Operation
5-46
Call Progress
This parameter specifies whether the DAP observes call progress tones when establishing
a dial backup connection. By observing these signals (busy signal, ringing, etc.) while a
call is in progress, the DAP can reduce the time needed to verify a failed connection.
This parameter is only operational when the DAP is connected to Sprint's Enhanced
Switched 56 Service.
Automatic Dial
This parameter specifies the conditions that cause the DAP to automatically place dial
backup telephone calls. You can select from the following options:
• DDS Down - DDS goes down due to Out of Service codes, Abnormal Station
codes, loss of multiport framing, or loss of network framing for a user-selectable
time period.
• No Signal - an invalid DDS signal is received from the network.
• Network Down - the DAP dials after the DDS network goes down or an invalid
signal is received from the network. This is the recommended setting for the
originating DAP.
• DTR - The DAP dials when the DTR signal is active. This setting allows
external routers and FRADs to originate dial backup calls.
• None - automatic dialing is disabled. This is the recommended setting for the
answering DAP.
Note: The DAP will not automatically dial when it is in a test state such as End-to-End
Network Loops.
Automatic Dial Timer
This parameter allows you to select how long the specified conditions must exist before
the DAP automatically places dial backup calls. The options are 5, 15, 30, and 60
seconds. The recommended setting is 30 seconds.
Switch to Dial
This parameter specifies whether the DTR signal must be present for the DAP to switch
communication to the dial backup telephone line.