RAD Data comm ASMI-450 Loop Rem Rem Port, TEST OPTIONS Operating Instructions, Step, Action

Diagnostics

LOOP REM REM PORT

When the remote user's port loopback is activated, the user's port interface of the remote ASMi-450 returns the received data signal toward the local user's DTE. The remote loopback is performed by internally connecting the DCE receive signal, to the input of the transmit path. The received data signal remains connected to the remote user's DTE. The test signal is provided by the local user's DTE, that must receive its own transmission without errors while the loopback is activated.

Figure 5-2 shows a typical remote user's port loopback.

This test fully checks the data link, including the cables connecting the two ASMi-450 to the HDSL line, the transmission plant connecting the two ASMi-450, and the cable connecting the local user's DTE to the local ASMi-450.

	LOCAL ASMi-450
User		Processing	HDSL Line
Interface			Interface

HDSL Line

	REMOTE ASMi-450
HDSL Line	Processing	User
Interface		Interface

TEST OPTIONS

Operating

Instructions

Figure 5-B. LOOP REM REM PORT Loopback

Before starting the execution of a test, note that in general you should activate only one loopback at a time.

To activate or deactivate a specific test, use the following procedure:

Step	Action	Key	Display
1	Bring the cursor under the left-hand field in	CURSOR
	the top row (if not already there)
2	Scroll to display TEST OPTIONS in the top	SCROLL	The right-hand field of the top row should
	row		show OFF, to indicate that no test is active.
			LOOPS indicates that a test is currently
			active (in this case, the front-panel TST
			indicator lights).
			Second row is empty
3	To enable the activation of tests, bring the	CURSOR,	The second row displays the first test option
	cursor under the right-hand field in the top	SCROLL
	row, and scroll to display LOOPS

ASMi-450 Installation and Operation Manual 5-7