ENHANCED PSD 239 H2R
JOB
A
ID
239 H2R
CLEI: T1R6VJWD_ _
61221045L2-22A
0111
LOOPBACK AND CONTROL CODES
FUNCTION
CODE
RESPONSE
ARM (in-band)
11000 (binary)
H2TU-C and H2R will arm and the H2TU-R will loop-up toward the network
ARM (ESF Data Link)
FF48 (hex) or 1111 1111
0100 1000 (binary) sent
H2TU-C and H2R will arm and the H2TU-R will loop-up toward the network
in the Facility Data Link
H2TU-R will only loop if the NIU option is enabled
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
H2TU-C Network Loop-Up
1
D3D3 (hex) or
If received while in an armed state, the H2TU-C will loop toward the network,
1101 0011 1101 0011
transmit 2 seconds of AIS(all 1s) followed by 5 seconds of loop code (D3 hex)
(binary)
and then 231 logic errors will be injected toward the network. The logic errors
will continue to be sent in 231 bit error bursts every 20 seconds as long as the
pattern continues to be detected by the H2TU-C. When the pattern is removed,
the unit will remain in loopback.
Loopdown w/out
9393 (hex) or
Automatically releases without disarming any H2TU-C and H2R that may be in
disarming
2
1001 0011 1001 0011 (binary) loopback toward the network.
Loopback Query
1
D5D5 (hex) or
Allows one to query the devices at any given time to determine whether any
1101 0101 1101 0101 (binary) units are in loopback. If D5 hex is received while in a loopback state, the unit in
question will transmit the logic error count toward the network using the same
methodology as identified in each of the loop-up descriptions (231 BE = H2TU-C,
10 BE = H2R1, 200 BE = H2R2 and 20 BE = H2TU-R).
Query Loop Parameters
DBDB
If the units are armed, and the H2TU-C is in network loopback, errors are
(1101 1011 1101 1011)
injected into the DSX-1 signal upon detection of the query loop parameters
pattern. As long as a pattern continues to be sent, errors are injected again
every 20 seconds. The number of errors injected each time depends on the
current status of signal quality and pulse attenuation parameters on each
loop. 111 errors are injected if all HDSL receiver [points (H2TU-C LP1/LP2,
H2R #1 NET LP1/LP2, H2R #1 CST LP1/LP2, H2R #2 NET LP1/LP2, H2R #2 CST
LP1/LP2, and H2TU-R LP1/LP2) indicate pulse attenuation is 30 dB or lower and
signal quality (margin) is 6 dB or higher. 11 errors at a time are injected if any
of the 12 receiver points indicate pulse attenuation is greater than 30 dB
and/or signal quality (margin) is less than 6 dB.
Loopback Time-Out
D5D6 (hex) or
If received during the armed state and prior to loopback initiation, the loopback
Override
1, 3
1101 0101 1101 0110
timeout override feature will automatically disable loopback timeout, i.e., the
(binary)
loopback will not timeout after the 120 minute default period. As long as the
units remain armed, the timeout will remain disabled. When the units are
disarmed, the loopback timeout will once again return to the default value.
Span Power Disable
1, 3
6767 (hex) or
If received during an armed state (must not be in loopback), the H2TU-C will remove
0110 0111 0110 0111 (binary) span power toward the line. As long as the pattern is received, the span power will
remain disabled. Once the pattern is no longer received, the H2TU-C will reactivate
span power. All units will then re-train and return to the disarmed state.
H2R1 Network Loop-up
1
C741
If an H2R is present and units armed, the H2R will loop up toward network, 2
(1100 0111 0100 0001)
seconds of AIS (all 1s) will be sent, 5 seconds of data will pass, and then 10 bit
errors will be injected into the DSX-1 signal. As long as the pattern continues to
be sent, 10 errors will be injected every 20 seconds. When the pattern is
removed, the unit will remain in loopback. If the pattern is reinstated, the
injection of 10 bit errors will resume at 20-second intervals.
H2TU-R Loop-up
1
C742
ESF facility Datalink: ESF only; when sent from the network, an H2TU-R
(1100 0111 0100 0010)
network loopback is activated and a 20-bit error confirmation is sent. When
sent from the customer, an H2TU-R customer loopback is activated with a
20-bit error confirmation.
1
Units must be armed with 11000b or FF48h before this code will work.
2
In order to behave like an NIU, the H2TU-R will not loop down from the network side with 9393h.
3
This code will be detected only if the units are armed AND there are NO loopbacks active.
NOTE: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted
upon.
*If NIU is enabled, then the H2TU-R can be in network loopback when the H2TU-C or H2R loop-up codes are sent.
■
For a complete Installation and Maintenance Practice faxback: (877) 457-5007, Document # 742. Please have your fax number available.
■
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.
STATUS LEDs
DSL NET
●
●
Off
No synchronization with the H2TU-C
●
Solid Green
Synchronized with an SNR margin greater than the user defined SNR
Margin Alarm Threshold
✷
Fast Blinking (Blinking 3 times per second) Attempting to synchronize with the
Green
H2TU-C
✷
Slow Blinking (Blinking 1 time per second) Synchronized with an SNR margin greater
Green
than the user defined SNR Margin Alarm Threshold and the pulse
attenuation is greater than the user defined Loop Attenuation Alarm
Threshold
●
Solid Yellow
Synchronized with an SNR margin greater than 0 dB but less than the user
defined SNR Margin Alarm Threshold
✷
Slow Blinking Synchronized with an SNR margin greater than 0 dB but less than the user
Yellow (1/sec) defined SNR Margin Alarm Threshold and the pulse attenuation is greater
than the user defined Loop Attenuation Alarm Threshold
●
Solid Red
Synchronized with an SNR margin of 0 dB
✷
Slow Blinking (Blinking 1 time per second) Synchronized with an SNR margin of 0 dB
Red
and the pulse attenuation is greater than the user defined Loop
Attenuation Alarm Threshold
DSL CUST
●
●
Off
No synchronization with the H2TU-R
●
Solid Green
Synchronized with an SNR margin greater than the user defined SNR
Margin Alarm Threshold
✷
Fast Blinking (Blinking 3 times per second) Attempting to synchronize with the
Green
H2TU-R
✷
Slow Blinking (Blinking 1 time per second) Synchronized with an SNR margin greater
Green
than the user defined SNR Margin Alarm Threshold and the pulse attenu
ation is greater than the user defined Loop Attenuation Alarm Threshold
●
Solid Yellow
Synchronized with an SNR margin greater than 0 dB but less than the user
defined SNR Margin Alarm Threshold
✷
Slow Blinking Synchronized with an SNR margin greater than 0 dB but less than the user
Yellow (1/sec) defined SNR Margin Alarm Threshold and the pulse attenuation is greater
than the user defined Loop Attenuation Alarm Threshold
●
Solid Red
Synchronized with an SNR margin of 0 dB
✷
Slow Blinking (Blinking 1 time per second) Synchronized with an SNR margin of 0 dB
Red
and the pulse attenuation is greater than the user defined Loop
Attenuation Alarm Threshold
LL/RL
●
Green
Indicates a loopback at the H2R toward the H2TU-R is active
●
Yellow
Indicates a loopback at the H2R toward the H2TU-C is active
ENHANCED PSD
CARD EDGE PIN ASSIGNMENTS
The Enhanced PSD 239 H2R , P/N 1221045L2,
must be used in conjunction with the Enhanced
PSD T200 H2TU-R, P/N 1222026L9. This H2R
will not function with any other H2TU-Rs. The
Enhanced PSD T200 H2TU-R will function with
all versions of the ADTRAN H2R, but the
enhanced spectral performance will only be
achieved using the Enhanced PSD 239 H2R.
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
GND
NC
CUSTOMER
NETWORK
SIDE 1
NC
NETWORK
GND
CUSTOMER
SIDE 2
BYPASS
