Unit installation

9-1

Chapter 9: Pre-Access Commands

What preaccess is:

Preaccess is a system used by several large linking sytsems to specify which controller in the

network a DTMF command is intended to go to. A common configuration would be to enter the

"*" key before commanding the local repeater, "#99" before commanding a distant controller via a

link, and "#98" before commanding a different controller on the linking system. The advantage of

requiring the user to "preaccess" a controller before commanding it is that you can use the same

command names on each controller without confusion as to which one you are talking to. This is a

very simplified description, but it should give you the idea.

What you need to know:

Because the preaccess system works quite differently from the way the RLC-3 normally works,

there is a lot involved with changing back and forth. Commands 070 and 071 have been provided

to make the conversion to preaccess easy and painless. If you have converted a port to preaccess

and want to change it back, use command 072.

You always configure one port at a time for preaccess, so you can set up one port for preaccess

and leave another port alone. This allows you to have a mixed system. This might be useful if you

want to try out preaccess on one port without forcing all of the users of a repeater on a different

port to change the way they do things. It also allows you to use the RLC-3 to interface between

linking systems that do things differently.