ADTRAN T200 IDSL User Manual
T200 IDSL OCU-R
Remote Termination Unit
Installation and Maintenance
Section 61220010L2-5C
Issue 3, April 2001
CLEI # NCT1TX2B _ _
CONTENTS
1. GENERAL.......................................................................... 1
2. OPTIONS ........................................................................... 2
3. INSTALLATION ............................................................... 3
4. TESTING............................................................................ 5
5. CONTROL PORT OPERATION ...................................... 7
6. REMOTE PROVISIONING AND DIAGNOSTICS ...... 16
7. MAINTENANCE............................................................. 16
8. DEPLOYMENT GUIDELINES ...................................... 16
9. WARRANTY AND CUSTOMER SERVICE ................ 16
FIGURES
Figure 1. IDSL OCU-R......................................................... 1
Figure 2. IDSL/DDS Circuit Diagram ................................. 2
Figure 3. Circuit Card Pin Assignments............................... 4
Figure 4. IDSL/DDS Trouble Codes .................................... 6
Figure 5. ADTRAN U-BR1TE Bidirectional Loopback ..... 6
Figure 6. IDSL/DDS Remote End Initiated Loopback,
Local Loop ............................................................ 7
Figure 7. IDSL/DDS Remote End Initiated Loopback,
Customer Loop ...................................................... 7
Figure 8. RS-232 (DB-9) Pin Assignments.......................... 7
Figure 9. Main Menu Screen ................................................ 9
Figure 10. Terminal Modes Menu Screen .............................. 9
Figure 11. System Status Screen .......................................... 10
Figure 12. IDSL Detailed Status Screen............................... 10
Figure 13. Loopbacks Screen................................................ 11
Figure 14. Performance Monitoring Screen ......................... 11
Figure 15. U-BR1TE 15-Minute Performance Monitoring
Screen .................................................................. 12
Figure 16. U-BR1TE 24-Hour Performance Monitoring
Screen .................................................................. 12
Figure 17. Frame Relay 15-Minute Performance Monitoring
Screen .................................................................. 13
Figure 18. Frame Relay 24-Hour Performance Monitoring
Screen .................................................................. 13
Figure 19. Event Log Screen ................................................ 14
Figure 20. Set Circuit ID Screen........................................... 14
Figure 21. Set Date and Time Screen ................................... 15
Figure 22. ADTRAN Information Screen ............................ 15
TABLES
Table 1. Options .................................................................. 2
Table 2. Protected Loopback Mode Requirement
T1E1.2/99-007R1 (Latching Loopback) .............. 3
Table 3. Compliance Codes ................................................ 4
Table 4. Wiring Connections .............................................. 4
Table 5. LED Indicators ...................................................... 5
Table 6. Alternating Loopback Sequences ......................... 5
Table 7. Latching Loopback Sequences ............................. 5
Table 8. Definition of Screen Abbreviations ...................... 8
IDSL
OCU-R
1220010
SYNC
CRC
NO
DSU
AP
NTWK
LBK
CUST
LBK
LBK
SC
64
56
19.2O
F
9.6
F
4.8
2.4
SW
56
-10
dB
O
QM
F
EC
F
LL
EN
SW 2
SW 4
SW 1
Frame IQ
LISTED
CUSTOM
TELECOM
E190349
Figure 1. IDSL OCU-R
1. GENERAL
This practice provides installation and maintenance
procedures for the IDSL OCU-R Remote Termination
Unit. Figure 1 is an illustration of the ADTRAN
IDSL OCU-R (P/N 1220010L2).
Revision History
Issue three of this document replaces the term IDSL-R
with OCU-R, where it is appropriate.
Description
The ADTRAN IDSL OCU-R is a termination unit
designed to deliver data rates up to 64 kbps and
provide testing functionality at the customer premises.
The IDSL OCU-R converts an industry standard
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
161220010L2-5, Issue 361220010L2-5C
2-wire Integrated Services Digital Network (ISDN)
U-interface to the traditional 4-wire DDS signal for
presentation to the customer.
2. OPTIONS
Options and rate are selected with the front panel DIP
switches as shown in Figure 1 and listed in Table 1.
The IDSL OCU-R is a digital network interface
device located at the customer premises point-ofdemarcation. In addition to terminating the ISDN
U-interface, the IDSL OCU-R functions as a
regenerative loopback device supporting Telcogenerated testing. The IDSL OCU-R unit is
available in T200 mechanics and can be optioned for
0 or -10 dB output toward the customer. Figure 2
illustrates the IDSL OCU-R Circuit Diagram. The
IDSL OCU-R is powered from -120 Vdc constant
voltage supplied by a U-BR1TE with PWR, or -48
Vdc provided by a locally powered T200 compatible
mounting.
T-Carrier
Channel Bank
U
B
2-Wire Loop
R
1
T
E
T/R Pair
Customer Premises
4-Wire Customer
Interface
IDSL OCU-R
DSU/CSU
Figure 2. IDSL/DDS Circuit Diagram
Table 1. Options
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CS
46atadlennahcraelck46stcelesNO
65
2.91
6.9
8.4
4.2
65WSnoitarepo65dehctiwSstcelesNO
Bd01-
MQgnirotinomytilauqselbaneNO
,65filennahCyradnoceSehtstcelesNO
detcelesera4.2ro,8.4,6.9,2.91
,NO=CSfi,dnaatadk65stcelesNO
atadlennahcyradnocesk65stceles
,NO=CSfi,dnaatadk2.91stcelesNO
atadlennahcyradnocesk2.91stceles
,NO=CSfi,dnaetaratadk6.9stcelesNO
atadlennahcyradnocesk6.9stceles
,NO=CSfi,dnaetaratadk8.4stcelesNO
atadlennahcyradnocesk8.4stceles
,NO=CSfi,dnaetaratadk4.2stcelesNO
atadlennahcyradnocesk4.2stceles
yblangistimsnartSDDsecuderNO
Bd01yletamixorppa
Features
• 2-wire DDS deployment provided over a
U-interface.
• Dual powering capability; Locally powered by
-48 Vdc provided by mounting assembly or by
-120 Vdc from a U-BR1TE with PWR.
• DB-9 craft interface access for provisioning,
testing, and performance monitoring.
• Frame IQ/ADS-6 provide physical layer and
Frame Relay PM and inband PM access
respectively.
• Protected loopback prevents false latching
loobpack at 64 kbps.
• Switch selectable data rate including subrates,
19.2 and 56 kbps rates, including secondary
channel, and 64 kbps clear channel capability.
• LED indicators for operational status.
• T200 mechanics.
• Transmits Abnormal Station Code upstream
during out-of-service 4-wire customer loop
condition.
CE
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gnihctalotdnopserottinuswollaNO
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NELL
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elbanelliwedomatadk46nielihwFFO
edomsihtnidelbane
Customer Interface Transmit Line Build Out
When -10 dB (SW1-1) is ON, the IDSL OCU-R
transmits a -10 dB AMI signal across the 4-wire
customer interface toward the CSU/DSU. When OFF
is selected the unit transmits a 0 dB AMI signal
toward the CSU/DSU.
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2 61220010L2-5, Issue 3 61220010L2-5C
Quality Monitor (QM)
When QM (SW1-2) is ON, the IDSL OCU-R
monitors the customer interface for errors. If
excessive errors are detected the unit blocks customer
data transmission and sends Abnormal Station Code to
the network. Customer data transmission is
automatically restored when the trouble condition is
cleared.
Table 2. Protected Loopback Mode
Requirement T1E1.2/99-007R1 (Latching
Loopback)
Sequence
Function
Exit data
protocol
Byte Code
Idle - 11111110
# of Received
Bytes
Minimum of
35 Idle bytes
Error Correction (EC)
When EC (SW1-3) is ON, the unit enables the
appropriate technique to ensure data integrity across
the digital network.
Latching Loopback Enabled (LLEN)
When LLEN (SW1-4) is ON, the IDSL OCU-R will
respond to latching loopback sequences.
False Loopback Immunity
ADTRAN’s Protected Loopback family of channel
units include an algorithm compatible with SARTS,
Hekimian, TPI, and other test systems that virtually
eliminates false latching loopback occurrences. This
algorithm is always enabled at 64 kbps. In addition,
ADTRAN’s Protected Loopback family features a
Protected Loopback mode for further false latching
loopback protection.
Latching Loopback
During operation up to 56 kbps, with LLEN enabled
(SW1-4 ON), the IDSL OCU-R will respond to the
legacy OCU latching loopback sequences and
translates CSU latching loopback sequences to the
DSU/CSU per TR62310 and ANSI T1.417. With
LLEN OFF, the IDSL OCU-R will not respond to
latching loopback.
Clear existing
loopbacks
Identify device
to be looped
Prepare to loop;
send MAP code
after 30 bytes
Activate
loopback
Minimum of 35 TIP bytes required to disable
established latching loopback.
X = Don't care bit
Transition in
progress (TIP)
X0111010
Loopback select
code (LSC)
X0000101 - DS0
X1010101 - OCU
X0110001 - CSU
Loopback
enabled (LBE)
X1010110
Far-End voice
(FEV)
X1011010
3. INSTALLATION
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Minimum of
35 TIP bytes
Minimum of
35 LSC bytes
Minimum of
100 LBE bytes
Minimum of
32 FEV bytes
At 64 kbps the function of the LLEN switch is altered.
At 64 kbps, placing LLEN ON will permit the IDSL
OCU-R to respond to the legacy latching loopback
sequence per TR62310 and ANSI T1.417. At 64
kbps, with LLEN OFF, the IDSL OCU-R enables
ADTRAN’s Protected Loopback.
Protected Loopback
ADTRAN’s Protected Loopback supports the new
proposed DDS latching loopback standard in T1E1.2/
99-007R1. When enabled, the IDSL OCU-R will
respond to latching loopback when the idle code
preamble is sent prior to the latching loopback
sequence specified in TR62310 and ANSI T1.417.
See Table 2 for the latching loopback sequence
requirement when Protected Loopback is enabled.
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. See Warranty and Customer
Service.
WARNING
• Never install telephone wiring during a
lightning storm.
• Never install telephone jacks in wet
locations unless the jack is specifically
designed for wet locations.
• Never touch uninsulated telephone wires
or terminals unless the telephone line has
been disconnected at the network interface.
361220010L2-5, Issue 361220010L2-5C
Wiring
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The ADTRAN IDSL OCU-R may be mounted in any
standard T400/T200 housing, or the following
ADTRAN T400/T200 housings:
Connections are made using screwdown terminals on
the barrier strip located in the rear of a single mount
housing. Figure 3 describes the circuit card pinout.
Table 4 shows the wiring connections for the IDSL
OCU-R.
CAUTION
On span-powered units, ensure ground continuity
exists between the unit, the housing, and a known
approved ground source.
Span Power Applications
• Single Mount Housing P/N 1212007L1
• Dual Mount Housing P/N 1212008L1
For 2-wire DDS deployment from D4/SLC-96 and
SLC-5 channel banks, a repeater powering U-BR1TE
is used to provide the metallic 2-wire DDS interface.
In these cases, the IDSL OCU-R is span-powered with
-120 Vdc and the customer premises installation
should include a span-powered mounting.
Local Power Applications
• Single Mount Housing P/N 1212007L2
For 2-wire DDS deployment from non-ADTRAN
digital loop carrier U-BR1TEs, the IDSL OCU-R must
be locally powered with customer provided AC. For
these applications a local powered T400/T200
mounting is required.
Table 3 shows the Compliance Codes for the IDSL
OCU-R. The IDSL OCU-R complies with the
requirements covered under UL 1459 third edition and
is intended to be installed in an enclosure with an
Installation Code (IC) of “B” or “E”. The IDSL
OCU-R is intended for installation in restricted access
locations only. Maximum input current at max load is
32 mA @ -48 Vdc with an output of 6 mA @ 10 Vdc.
The housing should be wired as follows:
• Network pair to terminal strip TR and TT positions.
• To Customer and From Customer pairs through
customer 8-pin RJ-48 modular connector.
or
• To Customer (DRT, DRR) and From Customer
(DTR, DTT ) to designated terminal strip
positions.
• Local -48 Vdc power supplied to pins 17 (GND)
and 35 (-48 Vdc) of mounting is provided only
when the OCU-R is
not span-powered from the
2-wire IDSL loop.
IDSL OCU-R
-48 Vdc RET
-48 Vdc PWR
To
Network
17
35
(TT)
41 55
(TR) (DTR)
47 49
Frame Ground
11
27
5
15
(DTT)
(DRT)
(DRR)
From
Customer
Customer
Figure 3. Circuit Card Pin Assignments
To
NOTE
The DDS customer port is classified as suitable
Table 4. Wiring Connections
for connection to intra-building or non-exposed
wiring only.
Table 3. Compliance Codes
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4 61220010L2-5, Issue 3 61220010L2-5C
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The IDSL OCU-R front panel LEDs display the
operating status. The LEDs are described in Table 5.
Table 5. LED Indication
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Table 6. Alternating Loopback Sequences
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PANEERGneebsahtinuehttahtsetacidniNO
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.cnyskrowtenonsierehttahtsetacidnI
.noitazinorhcnyskrowtensetacidnI
.srorreCRConsetacidniFFO
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.deveihcagnimarfCS
.denoisivorpyletomer
knillortnocetomersetacidniGNIHSALF
.evitca
denoisivorpyllacolsetacidniFFO
.noitarepo
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tseTotesnopserniecafretniremotsuC
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tnerrucgnilaesgnisreverfoesnopsers'TR
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Table 7. Latching Loopback Sequences
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4. TESTING
Loopback Testing
Loopback tests can be performed from the Central
Office (CO) to verify proper loop and IDSL OCU-R
operation. The IDSL OCU-R provides a network
loopback in response to an OCU latching or nonlatching loopback command. The IDSL OCU-R also
provides a sealing current reversal when the CSU
loopback command is detected. Alternating
loopbacks may be performed at all rates, except 64
kbps Clear Channel. See Table 6 for alternating
loopback sequences. See Table 7 for latching loopback
sequences.
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561220010L2-5, Issue 361220010L2-5C
IDSL/DDS Trouble Code
The IDSL/DDS system provides a quick diagnosis in
the case of a circuit condition where continuity is
broken when the IDSL/DDS circuit uses ADTRAN UBR1TEs with DDS Loopback capability in the central
office or remote terminal. The trouble code type
received by a tester determines whether the open
condition is occurring on the local loop or at the
customer premises. In the event of a 2-wire DSL loss
of signal, loss of sync, or open condition caused by an
open conductor or disconnected 2-wire loop, the
U-BR1TE transmits a Mux-Out-of-Sync (MOS 9Ah)
trouble code into the network as shown in Figure 4.
During a similar out-of-service condition at the
customer premises, the IDSL OCU-R transmits
Abnormal Station Code (ASC 9Eh) upstream into the
network as shown in Figure 4.
ADTRAN
U-BR1TE
Bidirectional
loopback
IDSL OCU-R
Test
Set
Figure 5. ADTRAN U - B R 1 TE Bid irectional
Loopback
Remote End Initiated LBK Tests
The U-BR1TE supports loopbacks generated from the
IDSL OCU-R which allow testing to be performed
without coordination with the CO or test center.
Loopbacks initiated by the IDSL OCU-R front panel
LBK pushbutton (SW2) aid in system turn-up testing
or troubleshooting from the remote end.
MOS 9Ah
ASC 9Eh
Channel Bank
U
B
R
1
T
E
Channel Bank
U
B
R
1
T
E
Open 2-wire Loop
ASC 9Eh
Customer Premises
OCU-R
Customer Premises
Open 4-Wire Customer
Interface
OCU-R
DSU
DSU
Figure 4. IDSL/DDS Trouble Codes
Loopback LED Operation
IDSL OCU-R loopback status is indicated via the
faceplate NTWK LBK and CUST LBK LEDs. An
active loopback occurring at the unit being viewed is
always indicated via a solid loopback LED. A flashing
loopback LED indicates a loopback condition at the
far end unit. When a loopback towards the network is
initiated, the NTWK LBK LED on the faceplate of the
IDSL OCU-R is illuminated. A loopback generated
towards the customer illuminates the CUST LBK LED.
ADTRAN U-BR1TE Bidirectional Loopback
The ADTRAN U-BR1TE will execute a bidirectional
loopback when performing DS0 DP loopbacks. Refer to
Figure 5 for an illustration of the bidirectional loopback.
The U-BR1TE responds to a loopback command
initiated at the IDSL OCU-R as follows:
Pressing the LBK pushbutton on the OCU-R once
will initiate a loopback at the U-BR1TE towards
the customer. See Figure 6. This allows data to
be sent from the remote end to test the local loop
and the IDSL OCU-R. This loopback is indicated
by a flashing CUST LBK LED on the IDSL
OCU-R and a flashing TEST LED (D4) on the
U-BR1TE.
Pressing the OCU-R LBK pushbutton a second
time initiates a loopback at the IDSL OCU-R
towards the 4-wire DDS (CPE) interface. A solid
CUST LBK on the IDSL OCU-R indicates a
loopback at the IDSL OCU-R towards the
customer equipment.
See Figure 7.
Pressing the OCU-R LBK pushbutton a third time
disables all current loopbacks initiated by the
OCU-R LBK pushbutton.
If errors exist the loopbacks can help determine the
source; either the local loop or the IDSL OCU-R.
During a remote end initiated loopback the IDSL/DDS
system transmits ASC 9Eh towards the network,
indicating an out-of-service condition generated by
the remote end, as shown in Figures 6 and 7.
All latching loopbacks, whether initiated by the craft
interface, LBK pushbutton, CO, or from a remote test
center, can be released by sending 35 DDS loop down
TIP bytes <X0111010> (where X is a “don’t care” bit).
6 61220010L2-5, Issue 3 61220010L2-5C
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