Operating Instructions and Installation Instructions

Connecting to the Landline Telephone Network
FRITZ!Box 7490 25
Connecting to the ISDN Line
ISDN line
1. Insert the long, gray end of the DSL/telephone cable into
the socket on the FRITZ!Box labeled “DSL/TEL”.
2. Insert the short, black end of the cable into a socket (S
0
interface) on your ISDN NTBA.
If the plug on the cable does not fit into ISDN NTBA, use
the black adapter included in the FRITZ!Box package.
DSL/
T
TE
L
DSL/TEL
FON 1
FON 1
FON 2
FON 2
LAN
1
LAN 1
LA
N
2
LAN 2
LAN
3
LAN 3
LA
N
4
LAN 4
Power
Power
FON S
0
FON S
0
W
LAN
WPS
DECT
Info
WLAN
Fixed Line
Internet
Power/DSLL