136 / Private networking using PRI SL-1Modular ICS 7.1 Installer Guide N0130943 02Routing for tandem networksIn tandem networks each node needs to know how to routecalls that do not terminate locally. To do this, you set up routesfor each connecting node by defining destination codes foreach route.If the node is also connected to the public network, the usualrouting is required for that connection.The following examples show the routing tables for Node Aand Node C for externally-terminating calls.Note: The PRI lines are enbloc lines, so all dialed digits arecollected before being dialed out.Node A Destination Code Table, external terminationNode B to Node F(continued)Node D receives it and identifies it as being for F.Uses the private trunk to route call to F.Incoming interface: IntercomDestination: Remote nodeNode F receives the call and identifies it asterminating locally. Uses target line to route call.Incoming interface: PrivateDestination: Local (target line)Route Absorb length Destination code (public DNs)4 (PSTN) 1 916043 (Node B) 0 91403762 (Node B)3 (Node B) 0 91403765 (Node E)4 (PSTN) 1 9140376* (not internal network)4 (PSTN) 1 914037* (not internal network)4 (PSTN) 1 91403* (not internal network)4 (PSTN) 1 9* (not internal network)* This wild card represents a digit between 1 and 9.Received Destination Description
