Basic knowledge of telephoning
Important: Phoning is only possible after users have been activated.Outgoing Calls/Exchange Line Request
When dialling phone numbers, the exchange line request type configured for the user must be noted. The COMtrexx distinguishes two types of exchange line requests:
Automatic exchange line request (factory setting): Neither external nor internal numbers require a prefix. The COMtrexx automatically distinguishes between internal and external numbers with the adjustment of the dialled phone number and the internal dial plan:
•If the phone number is contained in the dial plan, the COMtrexx establishes an internal connection.
•If the phone number is contained in the dial plan, the COMtrexx establishes an external connection.
Internal phone The user has to dial an external number with preceding exchange line access number.
Emergency calls
The emergency numbers set up on the COMtrexx are used for emergency calls. These calls are handled in a special way.
The exchange line access number required for other telephone calls (factory settings) can be omitted for emergency calls. This has the benefit that even people who do not know how to use exchange line access numbers can make emergency calls.
If the emergency priority circuit is enabled (factory settings), emergency calls take priority over other calls. If required, a call can be interrupted to enable an emergency call.
Caution: When telephones are being operated in several locations (e.g. used by several company offices, external staff or home offices), remember that emergency calls to these telephones can only be made if specific requirements have been met.Caution: Label the telephones that cannot be used for emergency calls. Inform all the users affected by this that they must use a different telephone that is available at that location to make emergency calls. For an emergency call via a smartphone, do not use a softphone installed on it, but normal mobile telephony.