COMMANDER
FUNCTION
KEYS
©
Tieline Technology
- 17 -
August 2002
FUNCTION KEYS
Quick Function Tips
The
CLEAR Key
is
a general
Escape (Esc) key.
Selecting the CLEAR Key takes you back to the
previous screen from the particular menu that you are in.
Many COMMANDER menu items can be quickly accessed by pressing either the F1 or F2 keys
followed by a single number (0~9).
A common set of items are installed as defaults and can also be reinstated through the “Reset
Function” in the menu system [Menu 09]. The default key settings provide a useful tool for the
operator.
The Keys can be tailored to individual requirements through the [07 Advanced Setup] menu and
its sub-menu option [06 Function Setup]. The Toolbox PC application (page 38) can also set the
function keys and save these settings as a data file for later reuse.
Default Function Keys
Function Key
Numeric Key
Function
F2 0
Call
Alert
F2
1
Activate remote Port 1
F2
2
Activate remote Port 2
F2 3
Renegotiate
Up
F2 6
Retrain
Current
F2 7
Toggle
PPM
F2 9
Renegotiate
Down
F2 & KEY: 0 – Call Alert
A piezo-electric “beeper” can be set off at the remote end by pressing F2+ 0 keys. A regular
beep sounds until pressing any key or knob resets the alert.
F2 & KEY 1, F2 & KEY 2 Activate remote control Ports 1 & 2 respectively.
F2 & KEY 3 Renegotiate Up
COMMANDER will attempt to renegotiate a higher bit rate for better audio quality. The audio is
muted for about 1 second during this process.
F2 & KEY 6 Retrain Current
COMMANDER modems communicate over the line to establish the best possible conditions
for data transmission. The modems “train” the line to compensate for variations in frequency
response and to cancel out any echo that may be present. Under some circumstances,
particularly when line conditions are subject to change, it may be beneficial to manually
request the modems to "retrain" the line by using F2 & KEY 6. The audio is muted for about 20
seconds during this process.
F2 & KEY 7 Toggle PPM Meter
Changes the Peak program meter to display either the incoming or outgoing audio level.
F2 & KEY 9 Renegotiate Down
Manually requests COMMANDER modems to renegotiate a lower bit rate.
Note:
This should be done when current line conditions no longer support the prevailing bit
rate. This is indicated by audible disturbances such as "popping" noises or distortion. The
audio is muted for about 1 second during the renegotiation process.
