DEDICATED TRANSMISSION PARAMETERS 14 June, 2002
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5.4.2 PARAMETERS
The initial settings of the following parameters are all FF(H) - all the parameters are
disabled. ‘Disabled’ means that the appropriate bit switch or other setting is used.
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
No. 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.
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