Meridian America Link/Customer Controlled Routing - Manual (Page 294)

276 Chapter 11: Peripheral device cabling interface
553-3202-210 Standard October 1998
Using an A/B switchbox to share system consoles
You can use a single terminal as a system console for more than one
application if you use an A/B switchbox. Follow the installation procedure
below to install the NT3M50AD (A0345353) and similar A/B switchboxes.
Note: Using an A/B switchbox to switch a console from one module
(either an IPE Module or an Application Module) to another may cause
system error messages to be lost. If the console is switched to one
module, any system error messages sent to the console from the other
module will be lost. For example, if Module A were to report SCSI
failure as a system console message while the A/B switch was set to
Module B, Module AÕs messages would be lost.
Connecting the A/B switchbox
1 Place the A/B switchbox in a suitable location near the IPE Module
or Application Module.
2 For the IPE Module: Plug one end of an NT1R03DB cable into the
port 1 connector of the NT1R03AA cable.
For the Application Module: Plug one end of the 9-pin-to-25-pin
cable (or extra NT7D61 cable) into the Application Module (J7 on the
I/O subpanel, SYS CONS on the universal I/O panel or card 1 conn
1 of the generic I/O panel) for your application.
3 Plug the other end of the cable into the connector marked ÒAÓ on the
rear of the A/B switchbox and secure it.
4 Repeat steps 2 and 3 for the second application, using the ÒBÓ
connector on the A/B switchbox.
5 Label the front of the A/B switchbox to indicate which application is
connected to each port.
6 Install a straight RS-232 cable between the ÒCÓ connector on the
rear of the A/B switchbox and the terminal.