Block referencing info/attributes from another block

[mike]

I often use AutoCAD to create signal flow diagrams (wiring diagrams) for audio visual systems.  I have blocks representing each piece of equipment with lines connecting them, showing wiring interconnections.  I attached a couple examples of such blocks.  What often happens is that these wiring diagrams get so large they have to span multiple drawing sheets, so I have to use reference arrow flags, as you see on the attached blocks.  For example, the audio DSP block is on drawing sheet TA703, but has a connection to the network switch which appears on sheet TA704.  I manually create the reference arrows stating "TO NETWORK SWITCH #2 PORT 3 ON TA704" and "TO AUDIO DSP #1 CONTROL ON TA703".  If I make changes to sheet numbers or wiring/ports, I have to remember to manually change these reference arrows.  Too much margin for error.  Is there a way I can have these two blocks reference each other, so they will automatically update when changes are made?  So essentially the reference arrow will need to pull and display the following info from the other block:  device name, port name, and drawing sheet number.  Is this possible, and if so, can you get me started down the right path to research how to do it?  Thanks!

[TheCADnoob]

Have you looked into the tools available in the AutoCAD electrical toolset? there may be some options there as well as some possibilities with Sheet set manager. 

If you created a data source (in my example a Access DB)

 

and updated it you could use something like DBCONNECT to house and update all the data. That way you just make the change in one place and all your changes are reflected in the link labels. There are some limitations with setup and use but it would be an easy way to do this.