The callback function offers a special form of access privilege: This requires the 'Callback' option to be activated in the peer list for the desired caller and the call number to be specified, if required.
LANconfig: Communications / Remote site / Remote Sites (ISDN/serial)
WEBconfig: LCOS menu tree / Setup / WAN / dialup-peers
Using the settings in the name and number list and the selection of the protocol (LANCOM or PPP), you can control the callback behaviour of your router :
- The router can refuse to call back.
- It can call back using a preset call number.
- First the name can be checked and then a preset telephone number can be called back.
- The caller can opt to specify the call number to be used for callback.
And all the while you can use the settings to dictate how the cost of the connection is to be apportioned. The router accepts all unit charges, except for the unit required to send the name, if call back 'With name' is set in the peer list. The caller also accepts a unit if the caller is not identified via CLIP (Calling Line Identifier Protocol). On the other hand, the caller incurs no costs if identification of the caller's number is possible and is accepted (callback via the D channel).
An especially effective callback method is the fast-callback procedure (patent pending). This speeds up the callback procedure considerably. The procedure only works if it is supported by both stations. All current LANCOM routers are capable of fast callback.