Ericsson F221m - Manual (Page 16)

Note: it is strongly recommended that the telephone
wire is installed indoors in order to avoid lightning
damage.
Note: the telephone wire should not exceed 600
meters. Larger distances can be achieved by using
high quality telephone wire.
Checking connections
Once the fixed line devices (1 up to 3) have been
connected, make the “Ring Back Test” as follows in
order to check the connections:
• Lift one telephone and dial **#10#. You will hear a
beep tone (the FCT red and green lights will start
flashing - three flashes synchronized).
• Hang up the telephone and check if all the
connected telephones start ringing.
• Lift any of the telephones connected and then hang
it up again. The ringing will stop (the red and green
lights will go to normal operation mode).
Tip: if any of the telephones has not been ringing,
check your telephone cable layout and connections to
make sure that all devices are properly connected.
Checking the calls quality
Use any of the telephones connected to the FCT to
make a call. Check the speech quality and ask the
receiver to call you back to confirm that you can also
receive calls.
If you have problems, see Troubleshooting and FCT
indicators on page 33.
Connections 15