Chapter 35 Private networking: PRI and VoIP tandem networks 327Networking Configuration GuideUsing VoIP to tandem systemsYou can connect multiple offices with BCMs across your company intranet. With this installationCallPilot directs calls throughout the system or for one system to support voice mail for thenetwork. Full toll bypass occurs through the tandem setup, meaning that any user can call any DNwithout long distance charges being applied. Users have full access to system users, PSTNconnections.Figure 102 demonstrates a multiple-BCM50 network. The network diagram shows two BCMs, butadditional base units can be added.Node B Node A User in Node B dials a private DN for a user on A.DN type: PrivateNode B recognizes it as being for Node A. Uses the private trunk to route the call thecall to A.Incoming interface: IntercomDestination: Remote nodeNode B receives the call and identifies it as terminating locally. Uses target line to routecall. (Private received #)Incoming interface: PrivateDestination: Local (target line)Node B Node C User on Node B dials a private DN for a user on C.DN type: PrivateNode B recognizes it as being the responsibility of Node A and routes the call over theprivate trunk to A.Incoming interface: IntercomDestination: Remote nodeNode A receives it and identifies it as being for C. Uses IP trunk to route call to C.Incoming interface: PrivateDestination: Remote nodeNode C receives the call and identifies it as terminating locally. Uses target line to routecall. (Private received #)Incoming interface: PrivateDestination: Local (target line)Table 70 Calls originating from the private network within a tandem network (Continued) (Sheet 2 of 2)Received Destination Description
