Cabling And Clock Source Requirements; 8-Channel & 2-Channel - HP 9000 Installation And Configuration Manual

Software Installation and Verification
Installation Verification
NOTE
Port-Definition
Port 0:0 RS232
Port 0:1 RS232
Port 0:2 RS232
Port 0:3 RS232
Port 0:4 RS232
Port 0:5 RS232
Port 0:6 RS232
Port 0:7 RS232
Port 1:0 RS232
Port 1:1 RS232
NOTE
40

Cabling and Clock Source Requirements

When testing a single port looped back on itself, you connect a
terminated connector or loopback hood to one of the ports on the
multiplexer panel. This serves to connect the Receive Clock (RC) to the
External Timing Clock (ETC), or CCITT circuit 115 to CCITT circuit 113.
Refer to the hardware reference manual for more details.
A Loopback hood and cable is supplied with the Interchange Panel or
Cable accessory.
For this type of loopback test, the Internal clock mode is required. (See
the ACC Utilities Reference Guide for a description of valid ACC clock
modes.) Referring to the sample configuration files in Appendix A, "Files,
Utilities, and Daemons," on page 67 of this manual, note that the
Port-Definition statements, which are automatically generated during
installation, define clock mode for even-numbered ports as "Int", and for
odd-numbered ports as "Ext" or external clock mode as follows:
8-Channel & 2-Channel
57600 Int SDLC x1 NRZ
57600 Ext SDLC x1 NRZ
57600 Int SDLC x1 NRZ
57600 Ext SDLC x1 NRZ
57600 Int SDLC x1 NRZ
57600 Ext SDLC x1 NRZ
57600 Int SDLC x1 NRZ
57600 Ext SDLC x1 NRZ
57600 Int SDLC x1 NRZ
57600 Ext SDLC x1 NRZ
If you are using an 8-port PCI card with an external loopback cable, you
need to specify the clocking parameter "ExIn" for an external DTE
configured port.
Chapter 2