General Info
Important: The expert settings for the ISDN connection are settings that should only be changed if e. g. country or provider-specific particularities make it absolutely necessary.Proceed as follows:
• Separately for PBX base number
• Using the Configuration Manager (page Public switched tel. networks > ISDN > PBX base numbers/trunk bundles > Configure)
Requirements:
• Configured PBX base number
Country code
International phone prefix (e. g. 0044 for the UK).
Local area code
Phone number prefix (e. g. 0208 for Greater London).
Note: If there is no fixed digit sequence as the area code at the installation location of the PBX, no entry is required here.Dial level
The selection of the dial level (Location, National, International) is country-specific. Depending on the country and the settings for the local area code above, a dial level must be selected (example: In Belgium, local area codes do not exist. Here, the dial level Location must not be selected).
Note: After the port settings once have been made correctly, no further changes should be made.Source suitable for clock synchronisation
This port is used as source for the clock synchronisation and serves as clock master for the PBX. Thus, interfering noise during calls are avoided.
Note: Select a port a source that is synchronous to the ISDN exchange line.Layer 1 permanently active
Requirements:
• External S0 port (optional, see Technical Data in the Operating Constructions)
An activation of the layer 1 is requested from the PBX as soon as the layer is put into the idle state by the network provider. Thus, for example, a delay time is avoided before the external dial tone indicates its action readiness.
Language delay at setup ack with inband info
Interfering noise during dialling phase are avoided.
Always send DTMF digit after inband info
Note: This is a country-specific setting (only relevant in Italy).All outstanding digits are transferred via DTMF.
No T310 for Info boxes
Note: This is a country-specific setting (only relevant in Italy).T310 is a timer for ISDN that disconnects a call connection after a certain time.
The call is not disconnected after a certain time.