M.1.2.3 "Connection" tab
Point to Point:
Activate this checkbox, if you operate your ISDN card on an ISDN point-to-point interface.
The ISDN line type (point-to-point or multipoint interface) is defined by the network operator.
Point-to-multipoint:
Activate this checkbox, if you operate your ISDN card on an ISDN multipoint interface.
The ISDN line type (point-to-point or multipoint interface) is defined by the network operator.
Permanent D channel layer 2:
When the checkbox is activated, the D channel layer 2 is permanently activated.
Required for the adjustment to different telephone systems (PBXs).
TEI (Terminal Endpoint Identifier):
Define here, which TEI (protocol element of D channel layer 2) shall be used.
Fixed TEI:
Required value between 1 and 63 (assigned by your ISDN service provider) to assign an unique identification to your ISDN card.
TEI=0 is the default value for the point-to-point protocol.
Auto TEI (default):
By selecting "Auto TEI", the ISDN card automatically assigns a TEI value. Only in case of point-to-multipoint connections.
Terminal Equipment side:
Device side
e.g. connection to a public line
Network Termination side:
Network termination side
e.g. connection to a subsystem