ADTRAN 1200287L1 Uživatelský manuál stáhnout pdf (Strana 102)

Chapter 6. Loopbacks

6-6 MX2810 M13 User Manual 61185001L1-1

Figure 6-7. Loopback Menu with BERT Selected

Line BERT

A L

INE

BERT enables the MX2810 to perform a “head-to-head”

BERT test toward the T1 line/loop. Selecting L

INE

BERT will

replace all incoming network traffic for the selected T1 with an

unframed 511 pattern toward the T1 line/loopU. When L

INE

BERT

is selected, additional menu items will appear to show the state of

pattern synchronization, cumulative error count, and a clear error

count option. Selecting D

ATA

ODE

will cease 511 pattern

generation and substitution of the incoming data stream.

When in L

INE

BERT mode, only the D

ATA

ODE

option for the T1

under test may be selected. Selecting any other option will result in an

error message being displayed.

Only one T1 port may engage a CSU L

OOPBACK

, CSU L

OOPBACK

BERT, or a L

INE

BERT. If a CSU L

OOPBACK

, CSU L

OOPBACK

BERT, or a L

INE

BERT is already active at the time a new CSU L

OOP

BACK

, CSU L

OOPBACK

/BERT, or L

INE

BERT is selected, the former

test will be terminated and the latter test will be engaged.

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