Operation Manual

18 AT-RG613/623TX Series Residential VoIP Gateway - User Manual
AT-RG623TX Connecting the ISDN ports
Connect ISDN telephone and ISDN fax units to the ISDN ports with the
appropriate UTP cable. Push the plug of the UTP cable into the ISDN port until
you hear a “click” and make sure it is correctly fixed by pulling the telephone cord
lightly.
Connect to ISDN 1 when you use only one telephone or fax machine
Figure 28: ISDN ports connection
ISDN 1
ISDN 2
S-Bus
UTP cable category 3 or higher