Front Panel152-402-145-02, Issue 2

 

Table 1. Front-Panel Description

 

 

Front-panel Feature

Function

 

 

List number

Identifies the list number of the H2TU-R-402.

 

 

Alarm (ALM) LED

Shows alarm states for remote and local Loss of Signal (LOS).

Steady red

Indicates a Loss of Signal (LOS) condition at the T1 input of the H2TU-R-402.

Blinking

Indicates an LOS condition at the T1 input of the H2TU-C line unit.

 

 

Loop LED

Displays HDSL2 Loop condition.

Steady green

Indicates HDSL2 loop is in sync.

Blinking once

Indicates the HDSL2 loop is trying to acquire sync.

per second

 

Blinking 4 times

Indicates a margin alarm condition on the HDSL2 loop.

per second

 

Blinking 10 times

Indicates a Cyclic Redundancy Check (CRC) error on the HDSL2 loop.

per second

 

OFF

Indicates no activity on the HDSL2 loop.

 

 

DS1 Framing LEDs (ESF and SF)

Indicates framing patterns. If DS1 signals are not detected, the ESF and SF LEDs will not light.

ESF LED = Steady green

Indicates Extended Super Frame (ESF). The LED blinks once per second when a frame error

 

occurs.

SF LED = Steady green

Indicates Super Frame (SF). The LED blinks once per second when a frame error occurs.

OFF

Indicates unframed or no signal.

 

 

DS1 Line Code LEDs (B8ZS and

Indicates DS1 code options. If DS1 signals are not detected, the ESF, SF, B8ZS, and AMI LEDs

AMI)

will not light.

B8ZS LED =Steady green

Indicates that the DS1 line code option is set to Bipolar with 8-Zero Substitution (B8ZS). The LED

 

blinks once per second when a string of excessive zeros is detected.

AMI LED = Steady green

Indicates that the user DS1 line code option is set to Alternate Mark Inversion (AMI). This LED

 

blinks once per second when a Bipolar Violation (BPV) is detected.

 

 

Loopback (LPBK) LED

Shows loopback states to and from the network and to and from the Customer Interface (CI).

Steady yellow

Indicates Network Remote (NREM) loopback, SmartJack (SMJK) loopback, or Transmit Loss of

 

Signal (TLOS) loopback.

Blinking once

Indicates Customer Local Loopback (CLOC) loopback state.

per second

 

Blinking 4 times per second

Indicates the H2TU-R is in an Armed state.

 

 

Loopback pushbutton

Activates or deactivates a dual loopback (NREM and CLOC) at the H2TU-R when the button is

 

depressed for more than five (5) seconds.

 

 

Sealing current (SCURR) switch

Enables sealing current option when H2TU-R is locally powered.

 

 

DS1 bridging (BRG) jacks

Provides non-intrusive bridging jack access to (OUT) and from (IN) the HDSL2 span at the DS1

 

interface. Allows the DS1 payload to be monitored.

Craft port (RS-232)

Provides bidirectional communication between the unit and an external terminal to allow configuration and performance monitoring through the maintenance terminal screens.

CLEI and ECI bar code label

Provides the human-readable Common Language Equipment Identifier (CLEI) code number and

 

the Equipment Catalog Item (ECI) bar code number.

 

 

Configuration number

The configuration number identifies the version of the product. New configuration numbers

 

usually accompany changes in the last two characters of the CLEI code.

 

The configuration number is found on a small label attached to the PC board. It can also be found

 

as the last two numbers (following the x) of the 13-character part number label affixed to the PC

 

board. For example: 150-1234-01-x01.

 

 

Extraction handle

Used to remove the H2TU-R-402 from its card slot.

 

 

4

June 16, 2000

H2TU-R-402