TOTAL ACCESS
®
1000 239 HRE
JOB
A
ID
239 HRE
CLEI: VAR1FC0B_ _
239 HRE
1179513L1
LP1
LP2
LP1
LP2
LL
(Y)
RL
(G)
N
E
T
C
U
S
T
LED STATUS
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 Ac25 ppm (exceeds Stratum 4)
61179513L1-22A
0212
LOOPBACK AND CONTROL CODES
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 ICOT
1
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
disarming
2
1001 0011 1001 0011 (binary) loopback toward the network.
HRE Network Loop up
1
C741
If an HRE is present and units armed, the HRE will loop up toward network..
(1100 0111 0100 0001)
HLIU Loop up
1
C742
If received while in an armed state, the HLIU will loop toward the network..
(1100 0111 0100 0010)
1
Units must be armed with 11000b or FF48h before this code will work.
2
In 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.
■
For a complete Installation and Maintenance Practice (P/N 61179513L1-5): (877) 457-5007, Faxback Document 900. Please have your fax number ready.
■
#61179513L1-22A#
C A U T I O N
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Card Edge Pin Assignment
Pin
Designation
Description
1
GND
Ground
2
NC
No Connect
3
T1
Customer Loop 1 Tip
4
R1
Customer Loop 1 Ring
5
T1
Network Loop 1 Tip
6
R1
Network Loop 1 Ring
7
NC
No Connect
8
T
Network Loop 2 Tip
9
R
Network Loop 2 Ring
10
GND
Ground
11
T
Customer Loop 2 Tip
12
R
Customer Loop 2 Ring
