Gestetner B003 Service Manual page 765

FAX COMMUNICATION FEATURES
4.4.2 MULTI-PORT
When the optional ISDN Unit or optional extra G3 Interface Unit is installed,
communication can take place at the same time through the two or three lines at
once.
Option
Standard only
Extra G3 Interface Unit
ISDN Unit
Extra G3 Interface Unit
+
Extra G3 Interface Unit
Extra G3 Interface Unit
+
ISDN Unit
B003/B004/B006/B007
Available Line Type
PSTN
PSTN + PSTN
PSTN + ISDN
ISDN
PSTN + PSTN + PSTN
PSTN + PSTN + ISDN
PSTN + ISDN
ISDN
4-16
Available protocol
Combinations
G3
G3 + G3
G3 + G4
I-G3 + G4
G3 + G3 + G3
G3 + G3 +G4
G3 + I-G3
or
G3 + I-G3 + G4
I-G3 + I-G3
or
I-G3 + G4
SM