ADTRAN 1000 239 HRE specifications Ust

	TOTAL ACCESS	®	1000 239 HRE	JOBAID
				61179513L1-22A
				0212
239 HRE	LED STATUS		LOOPBACK AND CONTROL CODES

	CLEI:1179513L1VAR FC0B_ _
	239HRENE
	2	T
22A#	LP21	C
		UST
-	LL	RL
	(Y)	(G)
#61179513L1

NETWORK
LP1 / LP2	● OFF	No synchronization with the ICOT.
	● GREEN	Synchronized with good signal quality on NET Loop 1/Loop 2
		(> 2 dB margin).
	● YELLOW	Synchronized with marginal signal quality on NET Loop 1/Loop 2
		(1 to 2 dB margin).
	● RED	Synchronized with poor signal quality on NET Loop 1/Loop 2
		(0 dB margin).
CUSTOMER
LP1 / LP2	● OFF	No synchronization with the RT.
	● GREEN	Synchronized with good signal quality on CUST Loop 1/Loop 2
		(> 2 dB margin).
	● YELLOW	Synchronized with marginal signal quality on CUST Loop 1/Loop 2
		(1 to 2 dB margin).
	● RED	Synchronized with poor signal quality on CUST Loop 1/Loop 2
		(0 dB margin).
LL / RL	● OFF	No active arming or loopback is detected at the HRE.
	● YELLOW	Indicates LB from HRE toward the network is active.
	● GREEN	Indicates LB from HRE toward the customer is active.

HDSL LOOP SPECIFICATIONS FOR OPTIMUM OPERATION

■Cable pairs must be nonloaded

■No single Bridged Tap > 2 kft

■Maximum loop resistance is 800 Ω

■Pulse attenuation (LOSS on HDSL Current System Status screen) < 30 dB

■Impulse noise < 50 dBrn as measured using a 50 kb filter

■Total Bridged Tap < 2.5 kft

■196 KHz insertion loss < 35 dB

■Signal quality of 6 dB or higher, with no fluctuation and equal on both loops

■Wideband Noise < 31 dBrn as measured using a 50 kb filter

■Internal Clock Accuracy +25 ppm (exceeds Stratum 4)

FUNCTION	CODE	RESPONSE
ARM (in-band)	11000 (binary)	ICOT and HRE(s) will arm and the HLIU will loop up toward the network.
ARM (ESF Data Link)	FF48 (hex) or 1111 1111
	0100 1000 (binary) sent	ICOT and HRE(s) will arm and the HLIU will loop up toward the network.
	in the Facility Data Link
Disarm (in-band)	11100 (binary)	All units are removed from the armed state and loopbacks will be released.
Disarm (ESF Data Link)	FF24 (hex) or 1111 1111
	0010 0100 (binary) sent in All units are removed from the armed state and loopbacks will be released.
	the Facility Data Link
Activation ICOT1	D3D3 (hex) or	If received while in an armed state, the ICOT will loop toward the network.
	1101 0011 1101 0011
	(binary)
Loop down w/out	9393 (hex) or	Automatically releases without disarming any ICOT and HRE that may be in
disarming2	1001 0011 1001 0011 (binary) loopback toward the network.
HRE Network Loop up1	C741	If an HRE is present and units armed, the HRE will loop up toward network..
	(1100 0111 0100 0001)
HLIU Loop up1	C742	If received while in an armed state, the HLIU will loop toward the network..
	(1100 0111 0100 0010)

1Units must be armed with 11000b or FF48h before this code will work.

2In order to behave like an NIU, the HLIU will not loop down from the network side with 9393h.

NOTE: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.

Card Edge Pin Assignment

Pin	Designation	Description
1	GND	Ground
2	NC	No Connect

3T1 Customer Loop 1 Tip

4R1 Customer Loop 1 Ring

5T1 Network Loop 1 Tip

6R1 Network Loop 1 Ring

7 NC No Connect

8T Network Loop 2 Tip

9R Network Loop 2 Ring

10 GNDGround

11T Customer Loop 2 Tip

12R Customer Loop 2 Ring

C A U T I O N !

SUBJECT TO ELECTROSTATIC DAMAGE

OR DECREASE IN RELIABILITY.

HANDLING PRECAUTIONS REQUIRED.

■ For a complete Installation and Maintenance Practice (P/N 61179513L1-5): (877) 457-5007, Faxback Document 900. Please have your fax number ready. ■