Configuring ISDN Telephones
5 Configuring FRITZ!Box Fon WLAN for Telephone Connections
43
8.
If you would like to assign additional numbers to the ex-
tension, select from the “Additional numbers” drop-
down menus any other numbers the device at the
“FON 1” line should react to for incoming calls.
9.
Click the “Apply” button.
10. If desired, set up the “Extension FON 2” and the “Exten-
sion FON 3” in the same manner.
5.4
Configuring ISDN Telephones
Up to eight ISDN telephones can be connected to the
FRITZ!Box Fon WLAN. Connect the ISDN telephones to the
ISDN S
0
port “FON S
0
”.
The following ISDN services are supported for Internet tele-
phony:
voice, telephony, audio 3.1 and fax G2/G3.
All other ISDN features are supported on the ISDN line. Out-
going connections with these ISDN service indicators are au-
tomatically routed via the ISDN line.
Assigning Internet and Fixed-Line Numbers to
ISDN Telephones
If the connected ISDN telephones should only react to cer-
tain numbers, MSNs must be configured in the ISDN tele-
phones.
Proceed as follows to specify whether calls are conducted on
the fixed-line network or over the Internet:
No MSNs Are Configured in the ISDN Telephone
If no MSNs are configured in the ISDN telephone, the main
phone number is used for outgoing calls. The main number
is listed in the “Telephony / ISDN Terminal Devices” menu.
z
If the main number is a fixed line, all calls will be con-
ducted on the fixed-line network.
z
If the main number is an Internet number, all calls will
be conducted over the Internet.
