Specifications

Defining Operating Parameters
5-45
• 57.6 and 56 Kbps are automatically changed to 52.8 Kbps (C64NI operating
mode).
When the DAP is in dial backup operation and the DTE data rate is 56 Kbps, no
secondary channel is provided. Therefore, if the unit is a remote and a CMS link exists
during normal operation (all operating modes except CC64), the link is lost when the unit
is in dial backup operation. When the DAP is in dial backup operation and the DTE data
rate is 52.8 Kbps or below, a non-interruptive secondary channel is provided. This
channel is compatible with the Milgo T7 channel. For remote units, the DAP provides an
NMI connector for Second Level T7 devices except when the operating mode is DDS.
The Dial submenu contains the parameters which control the operation of the Switched
56 IDBU feature. Table 5-14 lists these parameters along with their possible settings.
Parameters are listed in the order they appear on the screen. The screen abbreviation for
each parameter is shown in parenthesis.
Table 5-14. Switched 56 Dial Parameters
Parameter Possible Settings
Call Progress (Prgrs) Enabled, Disabled
Automatic Dial (ADial) DDS Down, No Signal, Network
Down, DTR, None
Automatic Dial Timer (ADTim) 5, 15, 30, 60 seconds
Switch to Dial (SDial) Always, DTR On
Automatic Disconnect (Disc) No DTR, None
Retry Attempts (Retry) 0 to 9
Dedicated Line Test (LTest) None, DDS Up
Line Test Interval (LTInv) 5, 10, 15, 30 minutes
Answer Calls (Answr) Always, Never, DDS Line or Local
Loop Down, No Signal
Port RTS-DCD Simulation (Port) Disabled, V.13, Out of Band
Ring Detect (RingD) Short, Long
The following sections explain the function of each Dial parameter.