3Com 3C63400-3AC-C - PathBuilder S700 Switch Reference Manual page 143

Figure 90 OC3/STM-1 UNI Configuration Menu
2 Configure the OC3/STM-1 card.
a Select [1] Card Information to display the OC3/STM-1 UNI Card Configuration
menu, shown in Figure 91. This menu displays the current configuration for the
OC3/STM-1 UNI module and provides options for changing certain parameters.
Figure 91 OC3/STM-1 UNI Card Configuration Menu
b Set the following parameters as desired:
Admin Status—Administrative Status: In Service or Out of Service.
Sonet Interface Mode—Synchronous Optical Network mode: OC3 or STM-1.
OC3 (SONET) is a high-speed synchronous system technology used on
fiber-optic cable networks. STM-1 (SDH or Synchronous Digital Hierarchy) is the
European equivalent of SONET.
ATM Payload Scramble—Enables (Yes) or disables (No) payload scrambling
for the OC3/STM-1 port. Payload scrambling scrambles the 48-byte payload in
outgoing cells in a defined manner and unscrambles the payload in incoming
Configuring OC3/STM-1 UNI Modules 129