ADTRAN T200 H2TU-R, Руководство по установке и обслуживанию

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3 61222026L1-5, Issue 1 61222026L1-5A
Table 3. Faceplate Loopback Pushbuttons
Switch
Label
Function
REM ........................... Pressing this button changes the H2TU-C loopback state as follows:
• If the H2TU-C is not in loopback, pressing this button will activate a customer loopback.
• If the H2TU-C is in loopback, pressing this button will deactivate the customer loopback.
LOC ............................ Pressing this button changes the H2TU-R loopback state as follows:
• If the H2TU-R is not in loopback, pressing this button will activate a bidirectional loopback.
• If the H2TU-R is in loopback, pressing this button will deactivate a bidirectional loopback.
Faceplate Indicators
There are six faceplate mounted status indicators,
described in
Table 2
.
Faceplate Pushbuttons
Two loopback (LBK) pushbuttons are accessible from
the faceplate. The REM loopback button controls a
customer loopback at the H2TU-C. The LOC
loopback button controls a bidirectional loopback at
the H2TU-R. See
Table 3 for details.
Table 2. Faceplate Indicators
Description
Indicates HDSL2 signal quality on the Loop is in one of the following five states:
Off ................................. No synchronization of H2TU-C and H2TU-R.
Red ................................ Poor signal quality on Loop (
≥
10
-7
BER).
Yellow ........................... Marginal signal quality on Loop (
≤
2 dB margin above 10 -7 BER).
Green ............................ Good signal quality on Loop (> 2 dB margin above 10 -7 BER).
Blinking ........................ Detected error at H2TU-C or H2TU-R (the color of this LED, when
flashing, will match the color representing the loop’s signal quality.)
This LED indicates three possible DS1 Signal conditions:
Off ................................. Customer-side DS1 signal is absent or is of a format that does not
match the HDSL2 circuit provisioning.
Blinking Green ............. Detected error on the DS1 interface.
Solid Green ................... 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 (H2TU-R).
Yellow ........................... Detected remote alarm condition (H2TU-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.
Solid Yellow .................. Active local bidirectional loopback from the H2TU-R toward the
customer and the network.
Green ............................ Active remote loopback from the H2TU-C toward the customer.
Blinking Yellow ............ Unit is armed but not in active loopback condition.
Indicator
DSL ................
DS1 .................
ALM ...............
ESF/SF ...........
B8ZS/AMI ......
LLB/RLB .......
TX
RX
B
R
G
1222026L1
REM
LOC
L
B
K
ALM
DS1
DSL
LLB/RLB
(YEL) (GRN)
ESF/SF
(YEL)(GRN)
B8ZS/AMI
(YEL) (GRN)