ADTRAN BR10 LOOPBACK TEST ADR6, NT1, Warranty, BCU DIP Test Switch Channel Selection, Indicator

BR1/10 2X MINI ISDN CHANNEL BANK

PRICING AND AVAILABILITY 800.827.0807 TECH SUPPORT 800.726.8663 RETURN FOR REPAIR 256.963.8722 www.adtran.com 61150081L2-22A

BCU DIP Test Switch

Channel Selection

BCU LEDs

Indicator	Color	Description
AY	Amber	ON indicates a Yellow Alarm is being received from the T1 carrier facility
AR	Red	ON indicates the BR1/10 side is in a Red Alarm condition
TP	Amber	ON indicates Trunk Processing is active on all U-BRITEs (10)
RCV	Red	ON indicates a loss of framing of T1 signal from the T1 carrier facility
ESF	Green	ON indicates the T1 Extended SuperFrame format is selected

	11	LIU		1
	50079L2		10		2
		9			3
		8			4
T			7	6	5
E
S				CRTX
T		LPBX			LPTX
		AD			NT1
		R6
		AD			AD
		R5			R1
		ADR4		ADR3	ADR2
		IN
		M
		O
		N
		OUT
DB-9 Connector
Bantam Jacks

LB ON	1	OFF	AY
REMOTE			AR
	2	LOC
DS0			TP
	3	DS1	RCV
B2
	4	B1	ESF
			SF

TEST	B8ZS	AMI
	10DSL	BDSL
	EXT	LOC
	LOOP	CAU
	DS1-LOC	RMT
	LP-SYNC	CRC
	CR-SYNC	CRC
	DSO-LB	ACT
BCU
		1150080L1

Loopback Address

				ON
							8	9	10
						7
					6
				5
			4
		3
1	2

Recessed Test Push Button

SF	Green	ON indicates the T1 SuperFrame format is selected
B8ZS	Green	ON indicates T1 B8ZS line coding is selected
AMI	Green	ON indicates T1 AMI line coding is selected
10DSL	Green	ON indicates D Channel 4:1 TDM mode is selected to transport 10 BRIs
8DSL	Green	ON indicates TR-397 3-DS0 framing across the T1 facility to transport 8 BRIs
EXT	Green	ON indicates External timing input is selected (BITS)
LOC	Green	ON indicates BR1/10 side is using a locally generated clock source to time the
		T1 network
LOOP	Green	ON indicates BR1/10 clock is recovered clock from the T1 network
CAU	Green	ON indicates clock is recovered from the DSL position #1 to time the T1 network
DS1-LOC	Green	ON indicates the BR1/10 side is in a Local DS1 Loopback
RMT	Green	ON indicates the unit has initiated remote DS1 loopback when set in ESF mode
		FLASHING indicates it responded to remotely commanded loopback, or has
		provided a loopback path for the T1 data-stream in SF mode
LP-SYNC*	Red	ON indicates the U-interface is out of sync for the selected channel unit
LP-CRC*	Red	In normal operation flashes upon receiving NEBEs from the loop. In Local PM
		mode flashes 6-19 CRCs and is solid when >20 CRC errors are detected from the
		loop

LOOPBACK TEST (ADR6, NT1)

Loopbacks in the network to customer direction can be initiated from either the ISDN switch (eoc) or the BR1/10 LIU and BCU. The down-stream direction is automatically selected based on the channel unit position in the circuit. To initiate a loopback, perform the following steps:

1. Insert TX and RX bantam plugs of the DS0 digital test set (i.e. TPI 108/109) to the TEST jacks of the

LIU

2. Connect test set clock interface to DB9 connector of the LIU and configure the test set for Near Logic and 64kb/s

3. Select the desired U-BRITE using the DSL rotary switch on the LIU( the selected U-BRITE LED flashes red and green for 3 seconds

4. Select the desired loopback address using the address rotary switch on the LIU (note: ADR1 is always the U-BRITE your test set is connected to

5. Select DS0 option and select the desired Bearer channel B1/B2 dip switches on the BCU

6. Press the recessed TEST push-button on the BCU to initiate the loopback test

7. The DS0 LB status LED on the BCU will illuminate if the loopback is successful and will not illuminate if the loopback failed

8. Send and Receive 2047 to the established loopback and observe the DS0 digital test set for bit errors

9. It is not necessary to exit the test mode to select additional addresses (ADR2, NT1) or to change to B1/B2 channels

10. To terminate the loopback, press the TEST push-button and the amber DS0-LB LED will go out

CR-SYNC*	Red	ON indicates no TR-397 framing across the T1 carrier for the selected channel
CR-CRC*	Red	In normal operation flashes upon receiving NEBEs from the T1 carrier. In Local
		PM mode flashes 6-19 CRCs and is solid when >20 CRC errors are detected
		from the T1
DS0-LB*	Amber	ON indicates the selected U-BRITE is in a 2B+D commanded eoc loopback.
		Flashing once per second=B1 is looped, flashing twice per second=B2 is looped
ACT*	Green	ON indicates the customer’s NT1 has successfully exchanged ACT bits with the
		network for the selected channel

*Status is for the channel unit selected on the DSL 10-position rotary switch on the LIU of the the BR1/10 side

WARRANTY

Warranty for Carrier Networks products manufactured by ADTRAN and supplied under Buyer’s order for use in the U.S. is ten (10) years. For a complete faxback copy of ADTRAN’s U.S. and Canada Carrier Networks Equipment Warranty, call (877) 457-5007, Document #414.