Configuration

Scenario

Company A and Company B share a PBX. Both companies each have a SIP account with the same provider but cannot make use of one another's SIP trunk.

Extensions 8xxx belong to Company A with reception at 8000. Extensions 9xxx belong to Company B with reception at 9000

Outgoing calls must be routed to the companies' SIP trunks respectively.

Incoming calls must be routed to to the companies' receptions respectively.

Extensions

• Extensions ports (both FXS and SIP) are assigned the appropriate extension numbers for each company. In this example below I have decided to make the two anologue extensions the receptions of each company.

Inbound

• Create inbound routes for each company and direct them accordingly. The example below has all extensions associated with its'company routed the the appropriate company reception.

SIP Trunks

• Create your SIP trunks according to the account details supplied by the provider. Note the two accounts differ by name and provider details.

Outbound

• Now to create the outbound routes for the particular companies. Directing the trunk priorities appropriately. The order or hierarchy of the routes do not matter as preference will be taken in the flexpaths we will create next. Below shows the Company A outbound route (OUTA) note the trunk priority is set to "CompanyA" SIP trunk. Company B (OUTB) naturally will be set to the "CompanyB"SIP trunk.

Flexpaths

With flexpaths we can now manipulate the call flow to create the outcome we want. Starting with incoming calls...

Now to manage outgoing calls. We can facilitate the call flow by directing the extensions.

• Create a flexpath for each company to direct the outgoing traffic on the designated extensions.
• In the example below "Aout" and "Bout" have been created. Create and Include route in flexpath "Aout". This is an internal route that facilitates dialling internal extensions. Repeat that for "Bout".
• Add a Match rule that matches outgoing numbers and routes them to the "OUTA" outbound route. Repeat for flexpath "Bout" matching outgoing numbers to "OUTB".
• Now on the ports pane, assign the extensions for each company appropriately.

The above scenario will facilitate calls accordingly, the only problem we are left with is internal calling, where Company A and B can still call each other internally. Note that Inter-company calls are facilitated by default and can be accessed by directly dialling a company's extensions (e.g. the receptionist for Company B could dial 8000 to reach the receptionist for Company A.) To disable this, we need to create FlexPaths that terminates service for cross-company numbers.

There are a few ways to facilitate this termination. In this example, since we have directed outgoing calls from the extensions to the flexpaths, we have created an outbound route that leads to nowhere and the caller will receive an "All circuits are busy now" beep.

As per above any number matching 8XXX will be sent to terminate through the termination outbound route created. Any other number will be caught and sent to the flexpath created above.