Soft Switch: #38; Soft Switch: #39 - NEC NEFAX 671 Service Manual

(38) SOFT SWITCH: #38

Bit
Designation
No.
Fine tune of 33.6
kbps/ 31.2 kbps
8
receiving speed for
V.34 modem
Set/Reset V.34
7 transmit level devia-
tion
6
V.34 flag number
between ECM frame
5
Phase 2 guard tone
4
power level (V.34)
3 Reserved
2 Reserved
1 V.8 /V.34 capability
• Bit 8: This bit when set to 1 can get higher speed communication for V.34 under the
same line condition.

(39) SOFT SWITCH: #39

Bit
Designation
No.
Disable V.34 TX for
8
V.34 modem
Disable V.34 RX for
7
V.34 modem
6
Flags number in
ECM frame for V.34
5
modem
Manual TX mode for
4
V.34 modem
Switch from V.17 to
3 V.34 if DIS bit 6 set
after received DIS
2 Delay time in pri-
mary channel for
V.34 transmit after
1
CFR or MCF signal
Function
0: No - modem default setting
1: Yes
0: Reset
1: Set
Flags number 2
Bit 6 0
Bit 5 0
0: normal power level
1: -7 db of normal power level
Reserved
Reserved
0: No
1: Yes
Function
0: No
1: Yes
0: No
1: Yes
Flags number 1
Bit 6 0
Bit 5 0
0: V.8 - start handshake from V.8
1: V.17
0: Yes - start V.8 handshaking.but only first
time
1: No - Continue start with V.17
Delay time 100 ms 200 ms 300 ms 500 ms
Bit 2 0
Bit 1 0
S-139
Initial
Setting
Bit HEX
1
1
1
4 8 10
0 1 1
0
1 0 1
0
0
0
1
Initial
Setting
Bit HEX
0
0
0
2 3 4
0 1 1
0
1 0 1
0
0
0
0 1 1
1
1 0 1
E
1
0
1