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STE User’s Manual

Remote Control Operations

Rel. 2.6

8-3

8-3. Feature Settings for Remote Control

8-3.1 Remote

Control

Only the TPA may enable the Remote Control feature.
Remote Control is available and supported on all networks supported by the STE family except for
STE-8510.
For the STE to process Remote Control data communications it must be under Remote Control. The TPA
must first enable Remote Control then enable either Remote Authentication or Secure Data ACL or both.
At least one of the two must be enabled in order for the STE to determine if the far-end terminal is an
authorized source. Refer to

Chapter 4

for TPA functions.

For the STE-R family to process voice communications they must be under Remote Control. The STE-R
family acts as if Remote Authentication is enabled whether it is or not.

8-3.2 Terminal

Control

With Remote Control enabled, you can set the STE’s control to either “Front Panel” or “Terminal Under
Host Port Control” via the Terminal Control menu. These settings are normally referred to as “local
control” or “remote control”. Refer to Paragraph

5-1.5

Office and Tactical STEs can be configured using the Front Panel (keypad, display, and function keys) to
make initial settings. A computer loaded with the STE Virtual Front Panel Tool (refer to Paragraph

10-

2.2

) must be connected to the

CONSOLE PORT

for all other STEs to use this feature.

Remote control is the normal setting for Data STE family and STE-R family terminals. This allows the
STE to accept and respond to “AT” commands received via

RED SERIAL DATA PORT 1

. When

operating in the Remote Control mode, any STE can transmit and receive secure data at any of the
available data rates and modes compatible with your network setting. Only the STE-R family can transmit
and receive secure voice calls. Nonsecure voice calls can also be processed under tightly controlled
circumstances. Refer to the TPA Functions to enable non-secure voice calls.
Remote control will default to asynchronous 38.4 or 115.2 kbps, as determined by the local mode menu
setting, and is backward compatible with STU-III data rates by using flow control (no parity – 8 data bits –
1 step bit – hardware flow control).

8-3.3 Auto_Answer

When Auto_Answer is enabled and a valid User Card inserted, the STE can automatically handle
incoming Type 1 secure data (and voice for the STE-R family terminals) when the terminal is unattended.
The Auto_Answer capability is enabled by the User setting the number of rings before the call is
automatically answered (S0 setting) to a number greater than zero. A setting of zero disables auto-
answer. (See Paragraph

8-5.2.45

.) The default for S0 is the number of rings set using the menu in local

mode if Auto_Answer is enabled in local mode. If not, it is 0.
The TPA must have enabled the Secure Data Application, and either the Remote Authentication or the
Secure Data ACL (or both). For a CEU, STE-R, STE-RI, or STE-RT to auto answer a voice call, the TPA
must have enabled the Secure Voice Application. Remote Authentication is treated as being active
regardless of the TPA setting.

8-3.4 Data

Port

The Data Port interface may be set to either EIA-232 (default) or EIA-530A. This interface is normally set
during installation of the connected device (

Chapter 2

8-4. Concept of Operation

8-4.1 Remote

Authentication

Remote Authentication provides the capability for the DTE to authenticate far-end key material and make
access control decisions via the AT+C1 command at the VERIFY prompt.