Frequently Asked Questions Telephony
191
If not, contact your service centre or an authorised dealer. The AC adapter plug of
the OpenCom 510 may be defective.
After restarting the OpenCom 510, nothing is indicated on the displays of any
connected terminals.
It takes a short while for the OpenCom 510 to start up.
After the restart, check whether the activity LED flickers in a regularly interval. This
indicates that the OpenCom 510 has started up correctly and is ready for ope-
ration. Further information can be found in the chapter Modules starting on
page 61.
If the OpenCom 510 has not restarted properly, reset the OpenCom 510 to its ori-
ginal factory setting (refer to the chapter entitled Resetting the System Data
starting on page 97).
19.2 Telephony
It is not possible to make external calls.
Check the connection between the NTBA and the OpenCom 510.
In the Configurator, check whether the external S
0
ports are configured correctly
(PBX Configuration: S0 menu):
– Configuration of System- / Multi-terminal access OK?
– Port is connected to the NTBA?
– Faultless Cabling?
– Terminating resistors properly configured?
The OpenCom 510 is connected to an NTBA with a multi-terminal configura-
tion. Why is it not possible to establish external connections?
With the original factory setting, an additional external S
0
port is set for an NTBA in
the system configuration; this additional port will be used first to seize a trunk line.
Deactivate the corresponding S
0
port in the Configurator (PBX Configuration:
S0 menu).
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