FCM9002 USER MANUAL
76-02-095 Rev.B
Page 129 of 145
4.7 Circuit / Flow Tests
The Testing menu serves two functions, it give access to the Layer 1 port
loopback functions and also gives access to the SAM ( Service Assurance
Module ) functions.
The top level testing menu is shown below,
Metrodata FCM9002 "FCM9002" Alarms: Major
CIRCUIT / FLOW TESTS
port Loops <menu>
SAM Flow Testing <menu>
first CAPITAL - select item
<escape> - exit menu
4.7.1 Port Loops
This menu gives access to the port loopback controls and enables the use to
apply a physical layer, layer 1 loopback to the user port or SFP port. The loops
are physical layer loops and simply loop frames back as they are received.
To apply a loopback simply select the port to which the loop is to be applied.
Then use the toggle function to select between:
NONE
-
No Loopback applied
LL
-
Local Loop, loop transmit back to receiver
RL
-
Remote Loop, Loop back receive to transmitter
OAM
-
Generate OAM loopback request to remote unit
WARNING:
Physical layer loops MUST be used with great care as they can introduce loops
and therefore cause traffic instability on a live network. These loops are only
intended for use with LAN Test Equipment.
