Ricoh D069 Field Service Manual page 465

Select detection of reverse polarity
in ringing
7
0: Off
1: On
G3 Switch 04 [SP No. 1-105-005]
No FUNCTION
0-3 Training error detection threshold 0 - F (Hex); 0 - 15 bits
4-7 Not used
G3 Switch 05 [SP No. 1-105-006]
No FUNCTION
This switch is used to prevent reverse polarity in ringing on
the phone line (applied to PSTN-G3 ringing). Do not
change this setting
0: No detection Outside Japan
1: Detection Inside Japan only
COMMENTS
If the number of error bits in the received TCF is below this
threshold, the machine informs the sender that training has
succeeded.
Do not change the settings.
COMMENTS
Bit Switches
7
273