Technical data

3.3 Telephony 40
Now you will set up the external phone line.
Figure 3.21: Telephony: External phone line
Connect the HorstBox to the phone line.
Analog main line: Connect the black analog cable to the black
connector "‘a/b S0 Ext"’ at your HorstBox. Connect the other end
to the corresponding jack at the DSL splitter.
ISDN main line: Connect the black ISDN cable to the black con-
nector "‘a/b S0 Ext"’. Connect the other end to the corresponding
connector at the NTBA.
Note: Attention! ISDN lines require connecting to an NTBA.