8-8 AlphaServer GS80/160/320 Users Guide

8.3.1 Bypass Modes

For modem connection, you can set the operating mode so that data

and control signals partially or completely bypass the SCM. The bypass

modes are snoop, soft bypass, and firm bypass.

Figure 83 Data Flow in Bypass Mode

Modem
System
SRM Console
Operating System
SCM Modem
Port (Remote)
Local System
Management Console
Modem
PK-0627A-99
SCMnn> SCMnn>
Remote System
Management Console
COM1
COM1 Port
UART
Modem Port
UART
SCM
Processor
Bypass
SCM Port
(Local)
DUART
UART
CSB
QBBs (PSMs)
PCI Boxes (PBMs)
H-Switch (HPM)