ADTRAN T200 FNID, Руководство по установке и обслуживанию

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61246026L6-5B Section 61246026L6-5, Issue 2 3
Front Panel Indicators
There are seven front-panel-mounted status
indicators. Each indicator is described in Table B.
Front Panel Switch
Two loopback (LBK) switches are accessible from
the front panel. The REM loopback switch controls
a loopback to the customer at the HTU-C. The LOC
loopback switch controls a bilateral loopback at the
HTU-R. See Table C for details.
Front Panel DS1 Monitor Jack
The HTU-R provides DS1 monitoring bantam jacks.
These jacks provide a non-intrusive monitor point
for DS1 traffic to and from the customer. For more
details, refer to subsection 4 of this practice.
DS1 Tx Level Setting
The DS1 Tx Level is controlled by a jumper (P1) on
the HTU-R card, as illustrated in Figure 2. The
available settings are 0dB and -15dB.
Caution: The DS1 Tx Level Jumper should
only be changed when the HTU-R is
not
powered.
Table B. Front Panel Indicators
Description
Indicates HDSL signal quality on Loop 1 is in one of the following five states:
Off ................. No synchronization of HTU-C and HTU-R on Loop 1.
Red ................ Poor signal quality on Loop 1 (
≥
10 -7 BER).
Yellow ........... Marginal signal quality on Loop 1 (
≤
2 dB margin above 10 -7 BER).
Green ............ Good signal quality on Loop 1 (> 2 dB margin above 10
-7
BER).
Blinking ........ Detected error on either end of Loop 1.
Indicates HDSL signal quality on Loop 2 is in one of the following five states:
Off ................. No synchronization of HTU-C and HTU-R on Loop 2
Red ................ Poor signal quality on Loop 2 (
≥
10
-7
BER)
Yellow ........... Marginal signal quality on Loop 2 (
≤
2 dB margin above 10
-7
BER)
Green ............ Good signal quality on Loop 2 (> 2 dB margin above 10 -7 BER)
Blinking ........ Detected error on either end of Loop 2
Off ................. Customer-side DS1 signal is absent or is of a format that does not match the HDSL
circuit provisioning
Blinking ........ Detected error on the DS1 interface
On Solid ........ Customer-side DS1 signal is present and synchronized
This LED indicates three possible alarm conditions:
Off ................. No alarm condition detected
Red ................ Detected local alarm condition (HTU-R)
Yellow ........... Detected remote alarm condition (HTU-C)
This LED indicates three possible framing modes:
Yellow ........... Indicates DS1 is provisioned for ESF framing mode
Green ............ Indicates DS1 is provisioned for SF framing mode
Off ................. Indicates DS1 is provisioned for Unframed operation
This LED indicates two possible line codes:
Yellow ........... Indicates DS1 is provisioned for B8ZS coding
Green ............ Indicates DS1 is provisioned for AMI coding
This LED indicates three possible loopback conditions:
Off ................. Unit is not in loopback or armed state
Blinking ........ The loopback arming sequence has been detected. In this state the unit is armed
but not in loopback.
On Solid ........ Active local loopback (HTU-R)
Indicator
LP1
LP2
DS1
ALM
ESF/SF
B8ZS/AMI
LBK
LP1
LP2
DS1
ALM
SF
AMI
LBK
ESF
B8ZS
H
D
S
L
LBK
HTU-C
1246026L6
LOC
REM
CUST
MON
R
S
TX
RX
2
3
2
(YEL)
(YEL)
(GRN)
(GRN)