Reference:Administration/PBX/Objects/Trunk Line

The Trunk Line PBX object represents the trunk line in the innovaphone PBX. To register an ISDN trunk line with the Trunk Line PBX object, an H.323 registration with specification of the gatekeeper ID and call number simply has to be activated on the interface with connected trunk line (see also chapter "Administration/Gateway/Interfaces").

The following specifications are made in the Trunk section:

• Loopback: If the call number of the exchange was dialled in incoming calls via the exchange, call forwarding can be initiated by specifying a valid H.323 name (Name) or E.164 alias (Number).
• Incomplete: If an incomplete call number was dialled in incoming calls via the exchange, call forwarding can be initiated by specifying a valid H.323 name (Name) or E.164 alias (Number).
• Invalid: If an invalid call number was dialled in incoming calls via the exchange, call forwarding can be initiated by specifying a valid H.323 name (Name) or E.164 alias (Number).
• Busy: If, in incoming calls via the exchange, a call number was dialled that is busy, call forwarding can be initiated by specifying a valid H.323 name (Name) or E.164 alias (Number).
• No Answer Timeout: If, in incoming calls via the exchange, a call number was dialled and there is no answer, call forwarding can be initiated, after the specified time has elapsed (Timeout), by specifying a valid H.323 name (Name) or E.164 alias (Number).
• Reroute supported: This check box determines wether Partial Rerouting will be performed while executing a diversion (CFU, CFNR). Please, see How to Configure EDSS1 Partial Rerouting for detailed configuration information.
• Set Calling = Diverting No: Concerns calls that arrive on the PBX via the Trunk Line PBX object and are then forwarded by CFU, CFB or CFNR (Call Forwarding Unconditional, Call Forwarding Busy or Call Forwarding No Response) again via the Trunk Line object. For example: Subscriber A calls subscriber B. Subscriber B forwards the call from subscriber A to subscriber C.
  The CGPN (Calling Party Number) remains unchanged for a call diversion. Merely the DGPN (Diverting Party Number) is also sent as information, so that both call numbers are visible at the diversion destination (subscriber C). For an external call diversion to the PSTN, it is not permitted to use an external CGPN (subscriber A), however. Therefore, the CGPN must be replaced by an associated call number, in this case the DGPN (subscriber B). If this check box is not enabled, the local telephone office, in such as case, will automatically replace the CGPN through "screening".
  If you enable this check box, the diversion call is signalled as a normal outgoing call. The CGPN is then a number that belongs to the connection (subscriber B).
• Outgoing Calls restricted: This check box allows you to suppress the display of the outgoing call number in general.
• Outgoing Calls CGPN: The call number for outgoing calls (Calling Party Number) can be manipulated in general.

Here is an example of how a trunk line can be established or simulated:

1. First, the Trunk Line PBX object with the E.164 call number 0 and the H.323 name Exchange must be created.
2. On a free ISDN interface (PPP, TEL, BRI or PRI), you enable the H.323 registration and allocate the name of the of the Trunk Line object (Exchange) or the call number (0), as well as the IP address of the gatekeeper on which the PBX is operated. It is also sufficient to specify the local IP address 127.0.0.1 if the gatekeeper happens to be operated on the same device. The interface must have successfully registered with the PBX object and calls to the Trunk Line PBX object must be possible. A dial tone is played at this point only with a connected ISDN trunk line. Suffix dialling digits are accepted.
3. To simulate a dial tone for least cost scenarios, for example (see also the chapter entitled "Administration/Gateway/Interface/Virtual Interface (TEST, TONE, HTTP)", a free VoIP interface is required, which likewise registers with the Trunk Line PBX object as the gateway (mode). The gatekeeper address is allocated as described in the previous point. The name (Exchange) or the call number (0) of the Trunk Line PBX object are also allocated in the same way (under Alias List).
4. Finally, a route from the ISDN interface and from the VoIP interface to the TONE interface must be created, enabling the simulated dial tone to be played. Suffix dialling digits are accepted.

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