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HCD-E1 Installation & Operation Manual Chapter 5 - Troubleshooting and Diagnostics
01/01/01 08:15 Diagnostic Tests 5-21
5.4 Diagnostic Tests
Diagnostic
Loopbacks
The user-controlled test functions of HCD-E1 consist of the following
diagnostic loopback tests:
Loopback Description
Terminal
Command
Designation on the LCD
Second Row Top Row
(Right)
Loopback (local) on the two HDSL lines towards the
DTEs connected to your HCD-E1
LOOP L LINE LOCAL LINE ML
Local loopback on the H-RPT repeater towards the
HCD-E1 unit configured as central
LOOP L HRPT LOCAL HRPT HRPT
Loopback (local) on the E1 sublink of the local towards
the DTE connected to it
LOOP L SL LOCAL PORT SL
Loopback (remote) on the E1 sublink of the local
HCD-E1 towards the DTE connected to the E1 sublink
of the remote HCD-E1
LOOP R SL REM PORT SL
Loopback (remote remote) on the E1 sublink of the
remote unit, towards the DTE connected to the E1
sublink of the local HCD-E1
LOOP R R SL REM REM PORT SL
Loopback (local) on the data channel X of the local
HCD-E1 towards the DTE connected to it
LOOP L CH X LOCAL CH CHX
Loopback (remote) on the data channel X of the local
HCD-E1 towards the DTE connected to this channel of
the remote HCD-E1
LOOP R CH X REM CH CHX
Loopback (remote remote) on the data channel X of the
remote HCD-E1 towards the DTE connected to this
channel of the local HCD-E1
LOOP R R CH X REM REM CH CHX
In-band activated loopback on data channel X of the
remote unit towards the DTE connected to this channel
of the local HCD-E1
LOOP INBAND
CH X
INBAND LOOP CHX
BER testing on the data channel LOOP BERT
CH X
BERT CHX
You can access these loopbacks from the TEST OPTION menu.
The following paragraphs describe the loopbacks identified by the
supervision terminal command.