Example of HFO SIP trunk gateway group settings.

Outbound caller ID

As just the last digit of the trunk number block is changing, you can select just the last digit (in brackets) and put it into the variable $1. As the provider wants the signalling number in the format (city-code)(number), you have to enter this number into the next line (here: 0891234567$1, where the $1 represents the changing part).

For external calls, we will present e.g. 08912345678 to the provider, and he will take care about the correct representation to the called party.

Asserted Identity

These fields are used specially for external forwardings. Some providers need special settings in order to present the correct number at the receiving party. For HFO Telekom, you can copy the entries from the Outbound caller ID fields. Here: \d\d(\d) and 0891234567$1 (new screenshot will follow).

Inbound DIDs

For incoming calls, you can use the regular expression, generated by the setup assistant. In your case you would have to adjust the city-code and the pilot-number, according to your line-settings.

^(?:(?:(?:0049|\+49|49|0)?89)?12345)?(.*)

This expression cuts all possibly available country- and city-codes and the pilot-number from the incoming number and only the extension is remaining (here: 678). This will be forwarded to the Inbound Routes.

Inbound caller ID

For incoming calls, we will add an additional 0 in front of the external number of the caller, in order to use the callback-feature of the phone (e.g. 0089987654321). During the call-setup the additional 0 will be automatically removed.

Gateways

This field will be empty when you create this Gateway group. It will show later the assigned SIP gateways.

Example of HFO SIP gateway settings 1/2.

Example of HFO SIP gateway settings 2/2.

Registrar

Use here the SIP-Server / Registrar (as mentioned on the paper, received by HFO Telekom).

registrar.hfosip.de

Proxy

Enter here the Proxy-Server, followed by ';lr'.

proxy.hfosip.de;lr

User

Enter here the Username (Benutzername), followed by '@extrasip.de'. Extrasip.de is a registered address/realm from HFO Telecom. This is needed to properly register the trunk at the provider.

For example

0891234567@extrasip.de

Dial command

The dial command is the command which is used in the asterisk software. The term {number:1}  means, that at the dialled number (e.g. 0089987654321) the first digit is removed. If you don't use a line access code (in most cases '0' is used), you have to remove the ':1' ! ! !

Group

Select here the previously created gateway group.

Update remote party ID (CLIP)

To display the correct extension at external parties, you have to use the P-Asserted-Identity (PAI) setting. If this is not selected, only the head-number (e.g. 0891234567-0) will be presented, no matter which extension is used for dialing.

From Domain

Enter here the Domain/Realm delivered by HFO Telecom

hfosip.de

T38 support

In order to have a better fax-support for fax-machines, connected to the FXS ports, please deactivate this option. In case only T38 faxes are used in the communication, you can  activate this option. Activated T38 option may lead to wrong error messages when sending faxes via machines which are connected to the FXS ports.

Underneath the configuration parameter you will see a preview of the complete sip.conf file.

Example of HFO Telecom Inbound routes.

Rule

Enter here a name for the according rule.

Date / Weekdays / Time

With these settings you can configure a time-controlled routing to different targets.

Pattern / Target

In the pattern you define which part of the incoming number is used to forward the call to the according extension.

In our example we receive already the correct extension from the gateway group. Therefore no further number-manipulation is necessary.

When the PBX finds an according extension it will route the call to it.

But you can add here exceptions from this rule, for example for internal fax users or waiting queues, etc.

Please have in mind the order of these rules, as the system is using First Match!!!

Example of HFO Telecom Outbound routes.

Rule

Enter here a name for the according rule.

Date / Weekdays / Time

With these settings you can configure a time-controlled routing.

Pattern

In the pattern you define how the outside line is seized. In our example all dialled numbers starting with '0' will use the Gateway group HFO Telecom.