ADTRAN T200 FNID Guía de usuario descargar pdf (Pagina 9)

T1 Surge Protection

Thermistors, and Sidactors limit transients appearing between the Tip and Ring of each pair. Transients

appearing at the power terminals or between input and output pairs are limited by PTC thermistors and a

metal oxide varistor.

T1 Alarm Contact

The Single Channel T1 System alarm contact allows you to monitor the health of your T1 Fiber Link

system. If any of the below faults are present the alarm contact will revert to its normal state:

•

BPV - Bi-polar Violations

•

AIS - All One’s Condition

•

FRM Alarm - Fiber Frame Loss

•

PWR - DC Power Loss

When all of the above conditions are OK the contact will change from its resting state to indicate that the

system is running and healthy.

Switch Settings

The DIP switch is located on the top surface of the card. You may need to pull the card slightly out of the

card housing to gain sufficient access to the switch.

B8ZS or AMI Encoding

The AMI/B8ZS DIP switch is used to establish the selection of B8ZS (bit 8 zero substitution) or AMI

(alternate mark inversion) line encoding for the T1 input.

Remote Loopback

The remote (RLOOP) loopback DIP switch is provided to allow for remote loop back of the copper T1 line

for trouble shooting purposes.

The loop back function begins at the T1 receive twisted pair, through the T1 LIU (Line Interface Unit), and

then back out the T1 transmit twisted pair. Normal operating position is OFF for All switch positions.

Signal Loop

OUT

CO Side Module

(Remote Side)

SUB Side Module

(Local Side)

T-1 TEST

EQUIPMENT

Fiber

1 2 3 4 5 6

ONON

1 2 3 4 5 6

•

Turn on RLOOP switch to check

copper wire connection

LLOOP

RLOOP

LBO-15

LBO-7.5

NOT USED

ON - AMI

OFF - B8ZS

1 2 3 4 5 6

RLOOP (Remote Loopback) Switch Diagram

! RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.ﬁberopticlink.com! Page 9

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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