Ricon B156, Service Manual

Page: 714 / 781

NCU PARAMETERS
B750 100 SM
Address Function Unit Remarks
6805AF Acceptable AI short protocol tone
(800Hz) detection frequency upper
limit (high byte)
6805B0 Acceptable AI short protocol tone
(800Hz) detection frequency upper
limit (low byte)
Hz (BCD) If both addresses contain
FF(H), tone detection is
disabled.
6805B1 Acceptable AI short protocol tone
(800Hz) detection frequency lower
limit (high byte)
6805B2 Acceptable AI short protocol tone
(800Hz) detection frequency lower
limit (low byte)
Hz(BCD) If both addresses contain
FF(H), tone detection is
disabled.
6805B3 Detection time for 800 Hz AI short
protocol tone 20 ms Factory setting: 360 ms
6805B4 PSTN: Tx level from the modem -N – 3 dBm SP2-103-002 (parameter
01).
6805B5 PSTN: 1100 Hz tone transmission
level - N 6805B4 - 0.5N 6805B5 –3.5 (dB)
See Note 7.
6805B6 PSTN: 2100 Hz tone transmission
level - N6805B4 - 0.5N 6805B6 –3 (dB)
See Note 7.
6805B7 PABX: Tx level from the modem - dBm
6805B8 PABX: 1100 Hz tone transmission
level - N 6805B7 - 0.5N 6805B8 (dB)
6805B9 PABX: 2100 Hz tone transmission
level - N 6805B7 - 0.5N 6805B9 (dB)
6805BD Modem turn-on level (incoming
signal detection level) -37-0.5N
(dBm)
6805BE
to
6805C6
Not used Do not change the
settings.
6805C7 Bits 0 to 3 – Not used.
Bit 4 – V.34 protocol dump
0: Simple, 1: Detailed (default)
Bits 5 to 7 – Not used.
6805C8
to
6805D9
Not used Do not change the
settings.
6805DA T.30 T1 timer 1 s
6805E0
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.