Buch1 > Functions, Uses, Concepts > VoIP/GSM Routing
VoIP/GSM Routing
VoIP/GSM routing precedes Least Cost Routing (LCR) and can be used to specify an order for exchange line assignment to certain prefixes or complete phone numbers. The LCR provider will then be dialled in advance at the selected exchange lines (except for GSM gateways). A table with exception numbers must be set up for this and saved in the PBX.
VoIP/GSM routing proceeds as follows:
A user dials an external number.
The PBX checks whether the phone number or the phone number range is specified in the exception numbers and switched on for the current configuration.
If the phone number is found, the PBX automatically forwards the dial attempt to the first selected connection.
If the selected connection is busy when dialled, the next connection selected is attempted (up to three are possible).
After a dial attempt with the third connection, if no connection is established, you hear the busy signal.
* Note: If a call is initiated over a targeted exchange line access point or VoIP access point, VoIP/GSM routing is not performed.
* Note: The VoIP/GSM routing is performed depending on the destination number, if the exchange line settings (subscriber, group) do not prevent this (e.g. exchange line authorisation only for selected connections, preferred exchange line, call restrictor).
* Note: The PBX uses fixed network connections to handle emergency calls as a priority (i.e. calls made to the phone numbers specified in Public switched tel. networks > Emergency calls as well as the automatic alarm calls made by the PBX.
* Note: The special numbers provided by the VoIP provider, for checking one's account status or mailbox, for example, usually do not include a local code. It is not possible to route numbers via the exception table. In order to correctly dial these phone numbers, use targeted exchange line assignment with the account number (targeted VoIP access point). Alternatively, you can enter such numbers as service numbers under Public swichted tel. networks > Emergency calls > Service numbers.
* Note: If no particular connection has been selected for door-to-external calls the routing is performed depending on the destination number.
* Note: For Call Through calls, the routing performed is dependent on the destination number, if the special exchange line settings do not prevent this (e.g. exchange line authorisation only to selected connections, preferred exchange line, call restrictor).
* Note: If routing has been enabled for call forwarding for external numbers, the routing performed is dependent on the destination number.
* Note: For call forwarding for subscribers and groups, the routing performed is dependent on the destination number.
* Note: When you dial one of the local numbers (phone number without a prefix) listed in the exception number table over a VoIP access point, the PBX automatically converts the phone number as specified under Number presentation (outgoing) for the VoIP provider.
* Note: When you dial one of the local numbers (phone number without a prefix) listed in the exception number table over a GSM connection, the phone number is automatically prefixed with the area code specified under Administration > Exchange line request.
Proceed as follows for configuration:
Creating exception numbers.
-Using the Configuration Manager (page Routing > VoIP and GSM routing > Exception numbers)
Configuring the VoIP/GSM routing configuration dependent.
-Using the Configuration Manager (page Routing > VoIP and GSM Routing > Routing configuration dependent)