ADTRAN E220 HFAC HDSL2 specifications Loss

Figures 10 and 10A consolidate current information for the HDSL / HDSL2, DSX-1, and DS1 interfaces. A key to the information provided is found in the center of the screen. Arrows indicate the key applies to both the HTU-C and HTU-R.

LOSS	Pulse Attenuation Measurement
SYNC	HDSL Loop 1 and Loop 2 Sync
	Status
ES 15M/24H	Errored Seconds*
SES 15M/24H	Severely Errored Seconds*
UAS 15M/24H	Unavailable Seconds*

*The first number is for the current 15-minute period and the second is the current 24-hour period (Loop 1 and Loop 2 numbers are displayed).

An indication of Pair Reversal (if present) is given at the bottom of the first key column. Loopback status for the HTU-C, HRE, and HTU-R is indicated on these screens. Status and configuration information for the DS1 and DSX-1 signals is located in the center of the screen near the bottom.

FRAME	T1 Framing Format select
CODE	T1 Line Code selected
LBO	Line Build-Out selected (for DSX-1);
	Customer signal of 0, -7.5, -15,
	and -22.5 dB (for DS1)
NIU	Network Interface Unit enabled?

BVP	Bipolar Violations detected (DSX-1 and
	DS1)
ES	Errored Seconds (DSX-1 and DS1)
SES	Severely Errored Seconds (DSX-1 and
	DS1)
UAS	Unavailable Seconds (DSX-1 and DS1)
Alarms	Lists current alarm condition status

A measure of signal quality for each HDSL / HDSL2 loop is displayed in graphic form on the bottom right of the screen. The measure is from 0 (poor signal quality) to 9 (excellent signal quality). Guidelines for interpreting the indicators are given below.

0Noise margin is ≤ 0 dB (≈ 10-7BER)

1-8 Margin measurement above 10-7BER in dB

9Margin is ≥ 9 dB above 10-7BER

Predicting performance based upon signal quality varies with each loop. Generally, a noise margin of 0 or higher will support a bit error rate of better than 10-7.

ADTRAN has defined the following as guidelines that correspond to the operation of the HTU-C and HTU-R faceplate LEDs labeled LP1 and LP2.

Margin < 0 Poor Loop Signal Quality

0 ≤ Margin ≤ 2 Marginal Loop Signal Quality

Margin > 2 Good Loop Signal Quality (better than 10-9BER)

08/08/70

18:05:00

SUMMARY - [ SLOT 8

]

SHELF

ADDRESS = 00

LOOP #1 <NETWORK> LOOP #2

ELAPSED TIME 00:14:17

LOOP #1 <CUSTOMER>LOOP #2

---------

HRE #1---------

--------- HRE #1---------

00 dB

00 dB

<-

LOSS

->

01 dB

01 dB

YES

YES

<-

SYNC

->

YES

YES

000/00000

000/00001

<- ES

15M/24H ->

001/00001

001/00001

000/00000

000/00000

<- SES

15M/24H ->

000/00000

000/00000

001/00001

001/00001

<- UAS

15M/24H ->

006/00006

001/00001

LOOPBACK INACTIVE

HRE#1 NET

SIGNAL QUALITY

N = NETWORK

SIDE RECEIVER

HRE#1 CUST SIGNAL

QUALITY

[X]

9

[X]

C = CUSTOMER SIDE RECEIVER

[X]

9

[X]

L[X]

8

L[X]

L[X]

8

L[X]

O[X]

7

O[X]

____

LP1 ____ LP1

____

____

O[X]

7

O[X]

O[X]

6

O[X]

HTUC

HRE1

HRE2

HTUR

O[X]

6

O[X]

P[X]

5

P[X]

===N

C===

====

P[X]

5

P[X]

[X]

4

[X]

[X]

4

[X]

1[X]

3

2[X]

===N

C===

====

1[X]

3

2[X]

[X]

2

[X]

____

____

____

____

[X]

2

[X]

[X]

1

[X]

LP2

LP2

[X]

1

[X]

[X]

0

[X]

[X]

0

[X]

“P” - prev scrn,

n”H” -

element (0H=HTU-C/R, 1H=HRE1, 2H=HRE2)

“M” - main menu,

“Z” -

clr current reg,

nn”S” - slot:

Figure 10A. HDSL Status Summary -HRE Screen

61221051L1-5A 61221051L1-5, Issue 1 11