Scm Com1 Operating Modes; Data Flow In Through Mode - Compaq AlphaServer 160 User Manual

8.3

SCM COM1 Operating Modes

The SCM can be configured to manage different data flow paths
defined by the com1_mode environment variable.
(the default), all data and control signals flow from the system COM1
port through the SCM to the active external port. You can also set
bypass modes so that the signals partially or completely bypass the
SCM. The com1_mode environment variable can be set from either
SRM or the SCM. See Section 8.7.1.
Figure 8–2 Data Flow in Through Mode
System
SRM Console
Operating System
Modem
8-6 AlphaServer GS80/160/320 User's Guide
COM1
SCM Modem
Port (Remote)
Modem
SCMnn>
Remote System
Management Console
QBBs (PSMs)
PCI Boxes (PBMs)
H-Switch (HPM)
DUART
COM1 Port
UART
SCM
Processor
Modem Port
UART
SCM Port
(Local)
SCMnn>
Local System
Management Console
In through mode
CSB
UART
PK-0627-99