## 13.2.2 Defining OSC CHPID connections to an OSC Control Unit 

The only way to define an OSA connection to its Control Unit is direct connected. 

You might want to connect the OSC Control Unit definition to multiple CPCs even though the physical OSC is still unique to any one CPC. Also, you might want to span the OSC over multiple CSSs within a CPC. 

The following are considerations for connecting an OSC CHPID to an OSC Control Unit and its 3270-X devices: 

GLYPH<SM590000> How many OSCs are required to provide a primary and secondary/backup network connection. 

GLYPH<SM590000> The example will be connecting to a predefined OSC Control Unit (1C60) and 3270-X devices 0700-070F. 

To define OSC CHPID connections to an OSC Control Unit, complete these steps: 

1. From the main HCD panel, select option 1.4. Control units . 

2. Scroll through the Control Unit List until you find the control unit you want to connect to or in the command line enter L 1C60 . In our example, we use 1C60. 

3. Enter c next to the Control Unit definition, and press Enter . 

4. Make any changes to the Control Unit definition that you want (Figure 13-4), and press Enter . 

+----------------- Change Control Unit Definition ------------------+ | | | | | Specify or revise the following values. | | | | Control unit number . . . . 1C60 + | | | | Control unit type . . . . . OSC + | | | | Serial number . . . . . . . __________ + | | Description . . . . . . . . ________________________________ | | | | Connected to switches . . . __ __ __ __ __ __ __ __ + | | Ports . . . . . . . . . . . __ __ __ __ __ __ __ __ + | | | | Define more than eight ports . . 2 1. Yes | | 2. No | | | | | | | | | | F1=Help F2=Split F3=Exit F4=Prompt F5=Reset F9=Swap | | F12=Cancel | +-------------------------------------------------------------------+ 

HCD now shows the Select Processor / CU panel. This panel is where the connection is now made between the OSC CHPID (C6) and the Control Unit (1C60). 

