PairGain 150-1236-54, Руководство пользователя

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Section 150-319-254
Revision 02
Page 26
4. TESTING PROCEDURES
4.01 Table 8 lists the four-character front panel
message displays of the ELU-319. This
display energizes when power is initially applied to
the ELU-319; it indicates system status and error
conditions. In order to conserve power, the display
de-energizes after five minutes if neither MODE or
SEL are pressed. The use of either button restarts
the 5-minute power-control timer.
4.02 If you encounter trouble with the G.703
interface, verify that the unit is making a
positive connection with the mounting assembly's
connector.
4.03
The transmit and receive G.703 ports have
splitting access and bridging miniature 210-
type jacks as shown in Figure 2. Connecting one
cable between the two BRG jacks and another cable
between the two SPAN jacks splits the XMT and
RCV jacks and creates metallic loopbacks towards
both the G.703 and the ELU-319.
TABLE 8. ELU-319 FOUR-CHARACTER FRONT PANEL MESSAGES
Message Full Name Description
CREM Customer Remote Loopback Signal from customer is looped back to customer at ELU-319.
NLOC Network Local Loopback G.703 signal is looped back to G.703 at ELU-319.
HDU1 Network Doubler 1 Loopback Loopback at Doubler #1 towards network initiated by ELU-319
front panel MANUAL LOOPBACK push-buttons or maintenance
terminal (Figure 14).
HDU2 Network Doubler 2 Loopback Loopback at Doubler #2 towards network initiated by ELU-319
front panel MANUAL LOOPBACK push-buttons or maintenance
terminal (Figure 14).
CDU 1 Customer Doubler 1 Loopback Loopback at Doubler 1 towards CI initiated by ELU-319 front
panel MANUAL LOOPBACK push-buttons or maintenance
terminal (Figure 14).
CDU 2 Customer Doubler 2 Loopback Loopback at Doubler 2 towards CI initiated by ILR code, ELU-
319 front panel MANUAL LOOPBACK push-buttons or
maintenance terminal (Figure 14).
CLOC Customer Local Loopback Signal from Customer is looped back to customer at ERU-412.
NREM Network Remote Loopback G.703 signal is looped back to G.703 at the ERU-412.
TLOS Transmit Loss Of Signal ERU-412 is in a logic loopback state caused by a loss of its
G.703 input from the NI, if enabled via the ERU-412 TLOS
switch option set to ON.
LBPV Local Bipolar Violation A bipolar violation has been received at the G.703 input to the
ELU-319.
SIG 1 or 2 Signal 1 or Signal 2 The ELU and first doubler transceivers are trying to establish
contact with each other on Loops 1 or 2 of Span 1.
S2L1 or 2 Signal 2 Loop 1 or Loop 2 The 1st doubler and ERU or 2nd Doubler transceivers are trying
to establish contact with each other on Loops 1 or 2 of Span 2.
S3L1 or 2 Signal 3 Loop 1 or Loop 2 The 2nd doubler and ERU transceivers are trying to establish
contact with each other on Loops 1 or 2 of Span 3.
Table continued on next page