"Advice Of Charge During the Call".
"Advice of Charge at the End of the Call". In Germany, this service is included in the "Komfort" connection.
CLIR (Calling Line Identification Restriction) can be offered by the ISDN provider: one can (from call to call) restrict the identification of one's own caller ID to the other party. In Germany, this must be applied for but is without charge (however call by call transmission of the caller ID costs extra).
COLP (Connected Line Identification Presentation) can also be offered by the ISDN provider. If you've applied for COLP, you get an extended dialing protocol. You will receive feedback from your telecommunication company who picked up your outgoing call. In Germany, it must be applied for, and costs extra. More information than COLP can be obtained with the help of a reverse-connected ISDN card.
The i4l developers have formed a team. The tool CVS allows the members to easily make patches. The history of the project is also thereby documented, and it is also not difficult to reproduce older versions.
A widely used low-level protocol.
A Siemens chip which is, similar to ISAC, on many passive cards. It takes over the serial bus from ISAC and demultiplexes when receiving or multiplexes (i.e. inserts the bits in the correct position) the B channels.
A Siemens chip which is, similar to HSCX, on many passive cards. It is responsible for Level 1, so it sits (almost) directly on the line. It handles the D channel protocol and sends the S0 data to a special serial bus (IOM). When sending it does the opposite.
TEI stands for Terminal End Identifier. The local switching station, or with an internal S0 the PBX, automatically or permanently assigns each end device a TEI. This simply allows the addressing of the D channels. TEIs have the following values: 0- 63 permanent TEIs (e.g. 0 is used for point to point connections) 64-126 automatically assigned 127 broadcast to all devices (e.g. an incoming call)
A PBX (Private Branch eXchange) is used to connect different internal devices to the ISDN network. This is usually for analog devices that cannot be directly connected to an ISDN network. The PBX can also make an internal digital S0 bus available, on which ISDN devices can be connected. This allows for local calls without using the switching station (thereby avoiding the charges from your telephone company).
Unlike a normal telephone connection, an ISDN connection can have more than one telephone number - each of these is called an MSN (Multiple Subscriber Number).
This is a German name for an MSN. In Germany, EAZ and MSN are used as synonyms, though in theory one ought to differentiate according to the protocol used. That which is called MSN in the Euro-ISDN protocol was called EAZ in the German 1TR6-ISDN protocol (a German predecessor to Euro-ISDN).