Answer an incoming call from an ISDN‑line

A ringing signal and a flashing lamp indicate an incoming call, answer the call in the normal way. One of the following four cases will occur.

Example 1:

The public net provides the number of the caller.

Mr. Plattner with public number 0 181100 4736 is calling.

Example 2:

The caller has activated Number Secrecy. (The calling number will be suppressed.)

Example 3:

The public net cannot provide the calling number, in this case the normal number of the external line will be shown.

Example 4:

The calling number has been diverted in the public net, the calling and the diverting number will be shown.