PairGain 150-1592-02, Руководство пользователя

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150-402-102-01, Revision 01 Product Overview
HRU-402 List 2 July 27, 1998 7
Craft Port (RS-232
DB-9 Connector) Provides bidirectional communication between the unit and an
external maintenance terminal through an RS-232 interface to
allow configuration and performance monitoring through the
Maintenance Terminal menus. See the section
“Connecting to a
Terminal Emulator” on page 15 for operating procedures.
HDSL LEDs Displays HDSL Loop 1 (LP1) and Loop 2 (LP2) Conditions.
Solid Green Indicates HDSL loop is in sync.
Blinking Green 1
time per second
Indicates HDSL loop is trying to acquire sync.
Blinking Green 4
times a second
Indicates a Margin alarm condition on the HDSL loop.
Blinking Green 10
Times a second.
Indicates a Cycle Redundancy Check (CRC) error on the HDSL
loop.
OFF Indicates no activity on the HDSL loop.
Extraction Handle Handle used to remove the HRU-402 List 2 from the remote
enclosure.
DS1 RCV Level
(LVL) Switch Sets DS1 RCV level.
0 Sets the DS1 receive level towards the CI to 0 dB.
-15 Sets the DS1 receive level towards the CI to a -15 dB.
Transmit Loss of
Signal (TLOS)
Loopback (LB)
Switch Enables or disables TLOS loopback option.
DIS Disables the TLOS option.
EN Enables the TLOS option.
Bar Code Label Contains human-readable Common Language Equipment
Identifier (CLEI) code number and Equipment Catalog Item (ECI)
bar code number.
Configuration
Number Label Contains either a five-digit or six-digit warranty configuration
number or a standalone two or three-digit configuration number
as follows:
• Digit 1= Last digit of shipment year
• Digits: 2 and 3= Shipment month
• Digits: 4 and 5= Configuration number
(a.) Any existing loopbacks are terminated before NREM loopback is activated.
(b.) If DS1 signals are not detected, the ESF, SF, B8ZS and AMI LEDs will not
light.
Table 2. Front Panel Components (Continued)
Name Function