User manual

Chapter 4. Operation
4-8 Version 1.0b Mar 2003
To modify the Loopback status press "3"
LOCAL <<< Define Port 1 Parameter >>>
Ch A Ch B Ch C Ch D
1. Service ON ON ON ON
2. Line Code HDB3 HDB3 HDB3 HDB3
3. Loopback OFF OFF OFF OFF
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[ Loopback ]
1. OFF
2. LLB (Local Loopback)
3. NELLB (Near End Local Loopback)
4. RLB (Remote Loopback)
5. RRLB (Request Remote Loopback)
Please select the item or <ESC> to previous menu.
Notice that "ch A" is highlighted, indicating it is the selected channel. Choose the desired loopback
mode from the menu shown or press <ESC> to exit.
If we <ESC> back to the "Define System" menu we can configure the card in Port 2 by pressing
"4". The following will be displayed. Here is the example for the E1 4-channel module. (unbalanced
75?)
LOCAL <<< Define Port 2 Parameter >>>
Ch A Ch B Ch C Ch D
1. Service ON ON ON ON
2. Line Code HDB3 HDB3 HDB3 HDB3
3. Loopback OFF OFF OFF OFF
Please Select Channel A ~ D or <ESC> to previous menu
The service status, Line Code setting, and Loopback mode are displayed for each of the 4 channels.
To change any of the channel settings, select the individual channel with the corresponding letter
A~B~C~D or press <ESC> to exit this menu. For an example of turning on Loopback for Channel
A, press "A". The following menu is displayed.