We have already found it easy to get lost in how things have been set up.  It is easy to create loops across cBridges when changing current routes and more especially when adding a cBridge to an existing cBridge or network of cBridges.  This is an early effort to document our routings to simplify making changes later.  This would also help other cBridge operators in setting up their routing if linking to us directly or via other cBridges.  Or so we think.  Here's our System Map to help visualize our approach and it shows Mapping in place while the set-up details may show port links as we are still transitioning from a single cBridge group to a 2 cBridge group.  The Talkgroup Matrix is the best operational reference for the DCI cBridges current talkgroup routing.

The premise is to make the priority for "Mapped" ("cBridge to cBridge" connections) links between cBridges rather than using the limited and expensive ports on a cBridge.  By Mapping a link, it frees up what would otherwise have taken up a port on each cBridge.  A peer or master IPSC manager should only be used to get an IPSC network on a cBridge.  From there, ideally, a network of cBridges will then handle all the linking/routing that is desired.  This of course requires more cBridges, which certainly can be an issue with ham clubs and individuals.

This list below shows various talkgroups (in concept) and their purpose and/or need.  Not all need be used or used across all cBridge ports as this is a concept idea to stimulate thought and discussion on how to best bring a cBridge onto multiple IPSC networks.

The names listed are intended to be more descriptive for understanding and not necessarily meant to be the final name. 

Using the same talkgroup names across the networks (where possible even if a different TG number) will reduce confusion.  If networks use multiple TG's frequently (common on TRBO-6) it is helpful when calling, to announce which TG you are using and now maybe which network you are on or cBridge you are using.

While using multiple TG's for various purposes may be handy, the downside to too many TG's is that there is likelihood of congestion on the Time Slots so a balance is likely wise.  The DCI network is implementing this idea and so far, has All Net and Roundtable in active service.