The callback function offers a special form of access security: This requires the 'Callback' option to be activated in the peer list for the desired caller and the call number to be specified.
LANconfig: Communication / Remote sites / Remote sites (ISDN/serial)
WEBconfig: LCOS menu tree / Setup / WAN / Dialup-peers
Using the settings in the name and number list, you can control the callback behavior of your router:
- The router can refuse to callback.
- It can call back using a preset call number.
- It can first check the name and then call back a preset telephone number.
- The caller can opt to specify the call number to be used for callback.
With this feature, the cost of the connection is largely carried by the company. If call back 'With name' is set in the peer list, the router accepts all unit charges, except for the unit required to send the name. 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. This speeds up the callback procedure considerably. The procedure only works if it is supported by both stations. All current LANCOM routers with an ISDN interface support fast callback.
