Canon FAX-L1000 - Manual (Page 476)

5-118
FAX-L1000 Chapter 5: Appendix
[Bit 6]
In the conditions for enforced G4/G3 fallback, it is possible to select whether or not to add
"Does the error code set in the fallback table coincide with the cause number received from
the network? If “
Reference ” is selected, the machine will fallback to G3 and call again
after an outgoing G4 call even if the “cause number” corresponding to the error code set
under the
#4C ISDN menu in ISDN BASIC G4/G3 Fallback is received from the
network. This setting is available when the ISDN BASIC Bitswitch SW08 Bit4 under the
#4C ISDN BASIC menu is “0.”
NOTE
Enforced fallback function
This is an function for outgoing G4 calls, in which a call is forced with G3 if
there is an error in B-channel communications after normal D-channel
connection.