DEDICATED TRANSMISSION PARAMETERS
21 May, 1999
4-52
4.4.2 PARAMETERS
The initial settings of the following parameters are all FF(H) - all the parameters are
disabled.
Switch 01
FUNCTION AND COMMENTS
ITU-T T1 time
If the connection time to a particular terminal is longer than the NCU parameter setting,
adjust this byte. The T1 time is the value stored in this byte (in hex code), multiplied by
1 second.
Range:1 to 127 s (01h to 7Fh)
00h or FFh - The local NCU parameter factory setting is used.
Do not program a value between 80h and FEh.
Switch 02
FUNCTION
COMMENTS
0
to
3
TX level
Bit 3 2 1 0 Setting (dBm)
0 0 0 0 0
0 0 0 1 -1
:
1 1 1 1 -15
If communication with a particular
remote terminal often contains
errors, the signal level may be
inappropriate. Adjust the TX level for
communications with that terminal
until the results are better.
4
TX level setting
0: Enabled
1: Disabled (bits 0 to 4 must all be at 1
to disable)
0: When enabling the TX level
setting, change this bit to 0, then
change the settings of bits 0 through
3 above.
1: When disabling the TX level
setting, change all of the bits 0
through 4 to 1.
5
6
Cable equalizer
Bit 6 Bit 5 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
Use a higher setting if there is signal
loss at higher frequencies because
of the length of wire between the
modem and the telephone exchange
when calling the number stored in
this Quick/Speed Dial.
Also, try using the cable equalizer if
one or more of the following
symptoms occurs.
•
Communication error with error
codes such as 0-20, 0-23, etc.
•
Modem rate fallback occurs
frequently.
7
Cable equalizer setting
0: Enabled
1: Disabled (bits 5 to 7 must all be at 1
to disable)
0: When enabling the cable
equalizer setting, change this bit to
0, then change the settings of bits 5
and 6 above.
1: When disabling the cable
equalizer setting, change all of the
bits 5, 6 and 7 to 1.
