Appendix
Troubleshooting
2004 by TELES AG Berlin, Version 2.0/iPBX8TRe/6.02, Issue: May 1998
Page 63
9.3 Troubleshooting
You can often solve minor problems during operation of the TELES.iPBX 8TR
Box by yourself. Before you contact the TELES hotline (see section 9.5.1, page
71), you should try to solve your problem according to the following examples.
Problem: You do not hear a dial tone on your terminal device (e.g. tele-
phone).
Cause
:
Your telephone is not properly attached.
Solution
1: Check the connection between telephone and box.
Solution
2: Is the red “power on” LED lit? Attach the power supply.
Solution
3: Check your terminal device.
Problem: No connection can be established or connections are interrupted
when you use the hold for enquiry, the transfer or the hold and
alternate functions.
Cause
:
The R key of the telephone is either set on “ground” or a wrong
hookflash time.
Solution
: Set the R key according to the telephone’s manual to a hookflash
time between 90 and 300 ms (see section 3.2.1, page 7).
Problem: The party you’ve called has hung up. However, you do not hear
the busy signal.
Cause
:
Once the remote party ended the connection, you hear nothing for
10 seconds till the busy signal comes. This process is necessary for
the TELES.iPBX 8TR Box so that all answering machines can iden-
tify the end of the connection.
Problem: You can telephone internally, but don’t get a connection to the
public net.
Solution 1:
Check that your box is properly connected to your ISDN terminal.
Solution
2
: Make sure that your ISDN line is configured to DSS1.
Solution 3:
Have you set the correct line type, i.e. point-to-multipoint or point-
Problem: Connections into the public net are possible, but incoming calls
do not arrive at the desired port.
Cause
:
A wrong number was programmed as own call number. The call ar-
rives at the drop port (port 1).
