System Management 
Basic System Configuration Guide 407
In addition to physical port on the 7750 SR, T1 or E1 channels on a Channelized OC3/OC12/STM1/
STM4 Circuit Emulation Service port can be specified if they are using adaptive timing.
There are restrictions on the source-port location for ref1 and ref2 based on platform. Refer to the 
description of the ref1 command for details.
Parameters port-id — Identify the physical port in the slot/mda/port, esat-id/slot/port, or pxc-id.sub-port 
format.
System Administration Commands
admin
Syntax admin
Context <root>
Description The context to configure administrative system commands. Only authorized users can execute the 
commands in the admin context.
Default none
application-assurance
Syntax application-assurance
Context admin
Description This command enables the context to perform application-assurance operations and only applies to the 
7450 ESS and 7750 SR.
upgrade
Syntax upgrade
Context admin>app-assure
Description This command loads a new protocol list from the isa-aa.tim file into the CPM and only applies to the 
7450 ESS and 7750 SR.
This command requires an ISA-AA reboot.