Ricoh A230, Service Manual, Page: 873 / 1134

BIT SWITCHES
2-9
ISDN U
N
IT
A8
1
6
SM A230/A231/A232
Bit Switch 19
No. FUNCTION COMMENTS
0 Permanence of the link
0: Set/released each LAPD
call
1: Permanent Keep this at 1 in the USA. In other areas, this bit
is normally 0, depending on network
requirements.
Note for US National ISDN
Keep this setting at 1.
1 Channel used in ISDN L2
(64k) mode
0: B1 1: B2 When making an IDSN L2 back-to-back test, you
can select either the B1 or B2 channel with this bit
switch.
2
SPID procedure (L2)
0: Disabled
1: Enabled
Note for US National ISDN
Keep this setting at 1.
3 G4 SPID procedure (L2)
0: Disabled
1: Enabled Note for US National ISDN
Keep this setting at 1.
4
to
7
Not used Do not change the factory settings.
Bit Switch 1A: CPS Code Used for G4 to G3 Fallback - 3
No. FUNCTION COMMENTS
0
to
6
Condition for fallback from G4 to G3
See the explanation for bits 0 to 6 of bit switch 17
7 Not used. Do not change the setting.
Bit Switch 1B: CPS Code Used for G4 to G3 Fallback - 4
No. FUNCTION COMMENTS
0
to
6
Condition for fallback from G4 to G3
See the explanation for bits 0 to 6 of bit switch 17
7 Not used. Do not change the setting.
Bit Switch 1C: CPS Code Used for G4 to G3 Fallback - 5
No. FUNCTION COMMENTS
0
to
6
Condition for fallback from G4 to G3
See the explanation for bits 0 to 6 of bit switch 17
7 Not used. Do not change the setting.
Bit switches 1D to 1F are not used. Do not change any of the factory settings.