ADTRAN D4 TRDDB User manual

3. Insert the TRDDB into its designated slot ensuring the edge connector seats firmly into the backplane.
4. After insertion the TRDDB will run a self-test and synchronization phase during which all LEDs
undergo an On/Off sequence. Refer to Status LEDs for descriptions.
5. After synchronization, which may take up to 90 seconds, the following LED indication will show:
■SYNC LED - Green
■All other LEDs will be Off until network occurrences cause them to turn On.
If LEDs in step 5 are as noted, proceed with loop testing per specifications.
If LEDs in step 5 are in any other configuration, refer to TROUBLESHOOTING GUIDE.
Hardware vs Software Provisioning
When SW1 is used for option selection those options take effect when the card is first inserted in the
channel bank. Subsequent software provisioning can override hardware options. Depressing the AP
pushbutton will toggle between the hardware and software option set. Option changes to either set can
be made when the set is active or inactive.
Typical Multipoint Deployment
CONTROL PORT OPERATION
The TRDDB can be remotely controlled via the craft interface on the TROCU-R. The terminal interface
operates at baud rates from 1.2 to 19.2 kbps, asynchronous, 8 data bits, no parity, and one stop bit.
Terminal sessions provide access to screen menus for the following:
■Provisioning
■Testing
■Performance Monitoring
Upon terminal connection, depress the space bar three times to access screens. Directions on the screens
guide craft personnel through the various menus.
Remote Provisioning and Diagnostics
The TRDDB responds to or supports the following:
■ADTRAN Digital System 6 Message Protocol.
■TPI 108/109 and 105 portable test sets.
■Hekimian React 2001 Release 1.900.
■ANSI Standard T1.107-1995 “Digital Hierarchy Format Specifications Annex G”.
TROUBLESHOOTING GUIDE
No Power at the TROCU-R
■Ensure TRDDB is supplying necessary voltage to power the TROCU-R. Measure T/R voltage at the
frame (Tip to Ground = -130 Vdc or less depending on voltmeter impedance, Tip to Ring = -125 to
-130 Vdc, ring to ground = 0). The Total Reach DDS system is not polarity sensitive.
■If no voltage is measured at the TRDDB, replace the unit.
■Remove the TROCU-R from the housing. Measure T/R voltage at the T200 mounting. Tip to Ring =
-125 to -130 Vdc.
■If voltage is not present at the TROCU-R, check continuity of cable pair.
■If voltage is measured at the TROCU-R, replace the unit.
JOBAID
61291004L2-22A
0009
D4 TRDDB
CLEI: D4C4EEHB_ _
D4 TOTAL REACH DDS (TRDDB)
FRONT PANEL OPERATION & FEATURES
Status LEDs
NO SX ●On No sealing current on local loop.
✷Flashing Short circuit on 2-wire loop.
SYNC ●Green Loop synchronized.
●Red Loop not synchronized.
CRC ●On Errors on 2-wire loop.
QM DISC ●On Quality Monitor Disconnect occurred.
REM ●On Software option set in effect.
✷Flashing Remote control link active.
●●Off Hardware option set in effect.
NO DSU ●On Customer CSU/DSU not detected/installed.
LBK ●On DS0, OCU, or CSU loopback exists.
✷Flashing TRDDB in loopback towards customer.
NOTE: All LEDs OFF indicates loss of power or other malfunction.
Front Panel DIP Switch SW1
Dip switch SW1 options should be made prior to installing the TRDDB circuit card.
SW1-1 - Latching Loopback On Responds to DS0 latching loopback (LLBK) sequences.
Translates OCU & CSU LLBK to TROCU-R
SW1-2 - Quality Monitor On TRDDB monitors incoming 2-wire loop and 4-wire
customer interface for errors. Excessive errors cause a
trouble code to be sent to the network: ASC (4-wire
errors) or alternating MOS and ASC (2-wire errors)
SW1-3 - 2.4 On Selects 2.4 kbps data rate
SW1-4 - 4.8 On Selects 4.8 kbps data rate
SW1-5 - 9.6 On Selects 9.6 kbps data rate
SW1-6 - 19.2 On Selects 19.2 kbps data rate
SW1-7 - 56 On Selects 56 kbps data rate
SW1-8 - 64 On Selects 64 kbps data rate
SW1-9 - SC On Enables secondary channel
NOTE: At 64 kbps LLBK is automatically enabled. SW1-1 then controls LLBK protection:
Off enables and On disables LLBK protection.
Front Panel AP Pushbutton SW2
Depressing the Alternate Provisioning pushbutton for five seconds will toggle between hard-
ware and software option settings. The REM LED shows which set is in effect.
Front Panel Bantam Jacks
Logic level Bantam jacks provide access to the transmit and receive sides of the data stream
for testing with a portable test set.
DEPLOYMENT GUIDELINES
■All loops must be non-loaded.
■Maximum Loop Loss measured at a Nyquist of 13.3 kHz is 50 dB AML or 47 dB EML
(135 Ωtermination).
■Maximum Loop Loss measured at a Nyquist of 28 kHz is 65 dB AML or 62 dB EML
(135 Ωtermination).
■Bridged tap length should not exceed 12 kft.
■Background noise level should not exceed 34 dBrn.
■Impulse noise should not exceed -40 dBm (+50 dBrn).
INSTALLATION & TURN UP
Installation assumes the TROCU-R is installed.
1. Wire 2-wire loop to T/R pair, pins 24 and 51 of the D4 backplane. Connect the DS0 input
pair to the MA/MB pair, pins 46 and 48, and the DS0 output pair to the EA/EB pair, pins
45 and 19.
2. Select required/desired options on SW1.
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.
■ For a complete Installation and Maintenance Practice: [phone], Document #546. Please have your fax number available. ■
DS0
4-wire
DS0
4-wire
DS0
4-wire
DS0
4-wire
DS0
IXC
T1
DS0
DP
MJU
TR
OCU-R
TR
DDB
DSU/
CSU
GPC, D4, or SLC96
2-wire
Loop
50 kft
TR
OCU-R
TR
DDB
DSU/
CSU
2-wire
Loop
50 kft
TR
OCU-R
TR
DDB
DSU/
CSU
2-wire
Loop
50 kft
TR
OCU-R
TR
DDB
DSU/
CSU
2-wire
Loop
50 kft
Customer Premises
CO

Pricing and Availability 800.827.0807
Tech Support 800.726.8663
Return for Repair 256.963.8722
www.adtran.com
61291004L2-22A
D4 TOTAL REACH DDS (TRDDB)
■The TROCU-R does not invoke a measurable short between tip and ring, thus cable resistance measurements
must be made with a manually applied short.
Power, but No Synchronization
■Check cable for load coils.
■Note signal meter reading on TROCU-R during power up and synchronization process. Refer to “Signal Loss
Indication”on TROCU-R job aid for definitions. Loop loss may be too great for synchronization to occur.
■Ensure loop length is within allowable deployment guidelines.
■Relocate the TROCU-R to splice points sequentially closer to the Total Reach DDB to isolate suspect cable
sections.
Excessive Errors On Loop
■Ensure background noise does not exceed 34 dBrn.
■Ensure impulse noise is not greater than –40 dBm (+50 dBrn). NOTE: Measure noise with 50 kbit filter.
■Compare resistances of individual conductors. If these are different, high-resistance or intermittent opens may
be indicated. A TDR is commonly required to find such faults.
■Relocate the TROCU-R to splice points sequentially closer to the Total Reach DDB to isolate suspect cable
sections.
Trouble Codes
The TRDDB transmits an alternating MOS 9Ah/ASC 9Eh trouble code towards the network under the following fault
conditions:
■2-wire DSL loss of signal.
■Loss of synchronization.
■Open loop.
■Quality Monitor disconnect.
The TROCU-R transmits an ASC 9Eh trouble code towards the network from the customer premise for similar 4-wire
customer interface fault conditions. (Example: mismatched Total Reach and CSU/DSU data rates.)
INSERTION LOSS MEASUREMENTS
Total Reach Design Limits at Traditional 4-wire Frequencies
The table below is for comparison only. The Total Reach DDS system operates at 13.3 kHz for all customer data rates.
TESTING
The TRDDB supports the following loopbacks and applications:
■DS0 latching bidirectional loopback from DS0 test set or remote test center.
■Remote end initiated loopbacks from TROCU-R.
■Supports 2-wire loop tests from remote end when DDS-DP is in bidirectional loopback.
■All existing Total Reach system loopbacks release in response to 35 DDS loop down TIP bytes, by
pressing the LBK button on the TROCU-R, or via a terminal through the DB-9 on the TR OCU-R.
Refer to loopback diagrams for all LBK pushbutton activated tests.
LBK & Pushbutton Tests
Successful loopback tests will show the following LED indication:
Compliance
CAUTION: This product is intended for installation in a restricted access location in a Type B or E
enclosure only.
Normal operation –Loop current will not exceed 22 mA @ -130 Vdc with a maximum power
requirement of 100 mA from -48 Vdc.
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 copy of ADTRAN’s U.S. Carrier Networks Equipment Warranty state-
ment, call [phone], Document #414.
TR
OCU-R
TR
DDB
Data
Pass-Thru
Bidirectional loopback
Pass-Thru Mode
4-Wire
CPE Interface
TR
OCU-R
Push once for Total Reach
DDB Loopback
Local Loop
ASC 9Eh
Loopback
Pushbutton
Bidirectional loopback
(initiated by CO or Test Center)
TRDDB LBK LED - ON
TROCU-R CUST LBK LED - FLASHING
TRDDB
local loop loopback
TROCU-R CUST LBK LED - FLASHING
TRDDB LBK LED - FLASHING
TR
DDB
Test
Set
Test
Set
4-Wire
CPE Interface
TR
OCU-R
Push twice for Total Reach
OCU-R Loopback
Local Loop
ASC 9Eh
Loopback
Pushbutton
ASC 9Eh
TROCU-R
customer loop loopback
TROCU-R CUST LBK LED - ON
TRDDB LBK LED - OFF
TR
DDB
Test
Set
CODE INPUT OUTPUT
Power Code (PC) F C
Telcommunication Code (TC) – X
Installation Code (IC) A –
Customer Rate 4-Wire Qualifying Frequency (kHz) DDS Loss Limit (dB)
2.4 1.2 21
2.4/SC 1.6 23
4.8 2.4 26
4.8/SC 3.2 29
9.6 4.8 33.5
9.6/SC 6.4 37
19.2 9.6 44
19.2/SC 12.8 50
56 28.0 59
56/SC & 64 36.0 61