STE User’s Manual
8510 Capabilities
Rel. 2.6
9-15
Using auto-secure call initiation ensures the connection will have highest data rate possible between the
two STEs. Data rates between two STE-8510 terminals can be as high as 128 Kbps synchronous or 115
Kbps asynchronous using STE signaling. If data bearers are available between two STEs, STE signaling
is guaranteed and the secure data call will use one of the two data bearer call appearances. If data
bearers are not available, the STE will attempt to perform STE signaling over voice bearers and the call
will be automatically transferred to a voice bearer call appearance with an LED. If the number being
called is a DEFINITY data module number, this voice bearer attempt will fail resulting in the initiating
terminal receiving a reorder tone and a failed non-secure call. You should reattempt the call using the
voice station number. If the STE signaling attempt is good, a secure call will still result in a secure data
call with a lower maximum data rate of 38.4 Kbps, synchronous or asynchronous. If the attempt fails, the
call will revert to SCIP signaling and, if the receiving terminal is SCIP capable, the call will result in a
maximum data rate of 9.6 Kbps, asynchronous only. If the receiving terminal is not SCIP capable, the
STE will revert to STU signaling with the same maximum data rate of 9.6 Kbps, synchronous or
asynchronous.
NOTE
Signaling modes can be disabled to allow you to select STU signaling directly.
All secure data calls are terminated by pressing the DROP button.
9-6.3.2 Receiving
Secure
Data
Calls on DEFINITY with STE-8510
Data calls using STE signaling must be placed to the DEFINITY 8510 data module number to attain a
data bearer. For STE signaling, you must set both terminals to the same data rate and data bearers
between the STEs must be available to achieve data rates higher than 38.4 Kbps. Incoming secure data
calls on voice bearers must be made to the voice station number and are subject to the same ring/idle
preference setting as secure voice calls.
A user answering a STE-8510 cannot tell whether the incoming call is on a data or voice bearer except by
the behavior of the STE after the call is answered. When a STE data bearer secure data call is
answered, the call automatically transfers to a data bearer call appearance and acts as if ring preference
has been set. Otherwise, the call appearance handling will happen as described above for voice calls
and the call will reside on a regular call appearance. Calls on normal call appearances will negotiate to a
signaling type compatible with the call initiator.
All secure data calls are terminated by pressing the DROP button.
9-7. SETTING UP STE-8510
For the STE to work as an 8510-type terminal, the switch type must be set to STE-8510. See Paragraph
for STE-8510 switch type setup instructions.
When set to the STE-8510 switch type, the STE provides a menu to prompt you to enter the number of
the Last Call Appearance programmed on the terminal. The Last Call Appearance configuration menu
allows the values 1 through 6 with a default value of 3. The Last Call Appearance configuration menu
was added to the Network setting menu immediately after the Directory Number #2 menu replacing the
Feature Codes menu, which is not used for the STE-8510 switch type. The Last Call Appearance
configuration menu will only appear when the switch type is set to STE-8510. See Paragraph
instructions on setting the last call appearance setting.
9-7.1
Setting the STE 8510 Switch Type
9-7.1.1 Single 8510 Switch Type Selection
The STE provides a configuration strap to set the ISDN switch type to STE-8510 (8510 mode). Refer to
for installation details. The display sequences used to support this feature are provided below.
Starting from the ACTIVE NETWORK PORT: ISDN display, press
SCROLL
to the SWITCH TYPE default
display (
Summary of Contents for CEU
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