21 May, 1999
NCU PARAMETERS
4-49
Service
Tables
Address
Function
Unit
Remarks
81E5B1
Acceptable AI short protocol tone
(800Hz) detection frequency lower
limit (high byte)
BCD
(Hz)
If both addresses contain
FF(H), tone detection is
disabled.
81E5B2
Acceptable AI short protocol tone
(800Hz) detection upper frequency
lower limit (low byte)
81E5B3
Detection time for 800 Hz AI short
protocol tone
20 ms
Factory setting: 360 ms
81E5B4
PSTN: Tx level from the modem
- N - 3
(dBm)
Function 08
(parameter 01).
81E5B5
PSTN: 1100 Hz tone transmission
level
- N
81E5B4
- 0.5N
81E5B5
- 3.5 (dBm)
81E5B6
PSTN: 2100 Hz tone transmission
level
- N
81E5B4
- 0.5N
81E5B6
- 3 (dBm)
81E5B7
PABX: Tx level from the modem
- dBm
81E5B8
PABX: 1100 Hz tone transmission
level
- N
81E5B7
- 0.5N
81E5B8
(dB)
81E5B9
PABX: 2100 Hz tone transmission
level
- N
81E5B7
- 0.5N
81E5B9
(dB)
81E5BA
to
81E5BC
Not used
Do not change these
settings.
Modem turn-on level (incoming
signal detection level)
-37-
0.5N
(dBm)
81E5DA
T.30 T1 timer
1 s
81E5E0
bit 3
Maximum wait time for post
message
0: 12 s
1: 30 s
1: Maximum wait time for
post message
(EOP/EOM/MPS) can be
changed to 30 s.
Change this bit to “1” if
communication errors
occur frequently during
V.17 reception.
