Number-list
Settings for call numbers with access authorization
Under this option, a number list is managed in which you can enter 64 different call numbers with their associated device names. This list can be used to assign the call numbers (CLI) transferred by remote stations to the remote station names.
The entries in the number list for the two calling devices GLASGOW and LONDON might appear as in the table below, thus permitting the name to be derived from the call number supplied and, if applicable, permitting a callback to be initiated via the name list:
Subscriber-number Device-name 875463 GLASGOW 040785647 LONDON This number list is required for passive connection establishment. The numbers of the remote stations must be listed without leading zeros for outside lines, etc.
The D-channel protocol that is currently activated is then used for a call number test.
If the 'Protect number' setting is selected and a call is received from a remote station, the remote station call number sent is compared to the entries in the number list. If the station number sent is identical to an entry in the list, the caller is authorized and the connection is established.
If the 'Protect no./name' setting is selected and a call is received from a remote station, the remote station call number sent is compared to the entries in the number list. If the call number sent is identical to an entry in the list, the caller is authorized to establish the connection. In addition, it is possible to derive the name of the remote station from the number list and, therefore, the layer that is to be used for this connection. The connection is then established using this layer and name verification is initiated using the layer detected (or using the default layer if no layer is detected).
If the name of the remote station (and thus the layer to be used) cannot be determined using the number list, the call will be accepted using the default layer and the name list will be checked for a suitable entry after the protocol (PPP) negotiation.
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