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CONTENTS
1.
GENERAL ........................................................................... 1
2.
OPTIONS ............................................................................ 2
3.
INSTALLATION ................................................................ 2
4.
TESTING ............................................................................. 4
5.
DEPLOYMENT GUIDELINES ......................................... 6
6.
WARRANTY AND CUSTOMER SERVICE ................... 7
FIGURES
Figure 1.
ADTRAN TRDDS-R ............................................. 1
Total Reach DDS Circuit Diagram ........................ 2
TRDDS-R Option Switch ....................................... 2
Circuit Card Pin Assignments ................................ 3
Signal Loss Indication ............................................ 4
Pass-Thru Mode ...................................................... 6
Normal Mode .......................................................... 6
TABLES
Wiring Connections ................................................ 3
UL/CUL Telecommunications Codes .................... 3
Faceplate Indicators ................................................ 4
Interoperability Matrix ........................................... 4
Latching Loopback Sequences ............................... 5
Alternating Loopback Sequences ........................... 5
Total Reach Dataport Loopbacks ........................... 6
@ 13.3 kHz ............................................................. 7
TRDDS Insertion Loss Measurements .................. 7
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN TRDDS-R Total Reach
Rate DDS Termination Unit. Figure 1 is an illustration of the
ADTRAN TRDDS-R Unit.
The ADTRAN TRDDS-R is a span-powered termination
unit designed to deliver data rates up to 64 kbps and provide
testing functionality. Used in combination with a Total
Reach dataport unit, the TRDDS-R converts the two-wire
Total Reach signal to the traditional four-wire DDS signal for
presentation to the customer.
Trademarks: Any brand names and product names included in this document are trademarks,
61291021L5-5A
registered trademarks, or trade names of their respective holders.
Total Reach
®
All Rate DDS Termination Unit
For Outside Plant and Customer Premise
Installation and Maintenance
®
Section 61291021L5-5A, Issue 1
TRDDS-R
Cu sto m
Te lec om
E1 903 49
Figure 1. ADTRAN TRDDS-R
The TRDDS-R must be used with an appropriate
Total Reach dataport unit.
The TRDDS-R is an auto-rate adaptive digital network
interface typically located at the customer premises point-of-
demarcation. The TRDDS-R will deliver a standard four-
wire DDS signal up to 18 kft beyond the TRDDS-R. Both
customer and network interfaces are equipped with outside
All
plant lightning protection. The customer interface is capable
of receiving signals attenuated to -45dB at the Nyquist
frequency of four-wire AMI DDS. In addition to
terminating the two-wire extended range signal, the TRDDS-
R functions as a regenerative loopback device supporting
Telco-generated testing. The TRDDS-R unit is available in
T200 mechanics, and may be optioned for 0 or -10 dB output
toward the customer. Figure 2 illustrates the Total Reach
DDS Circuit Diagram.
Section 61291021L5-5A
Issue 1, April 1999
CLEI Code # D4OIKTU8 _ _
SW 1
NOTE
Page 1
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Summary of Contents for ADTRAN TRDDS-R
-
Page 1: Table Of Contents
The TRDDS-R is an auto-rate adaptive digital network interface typically located at the customer premises point-of- demarcation. The TRDDS-R will deliver a standard four- wire DDS signal up to 18 kft beyond the TRDDS-R. Both ® customer and network interfaces are equipped with outside plant lightning protection. -
Page 2: Options
• Extended range on customer interface up to 18 kft or -45 dB • Sealing Current of 12 mA on the four-wire customer interface With -130 Vdc, ADTRAN’s TRDDS system is in the A3 Class as specified in Bellcore TR-NWT-001089, Standard for Electrical Safety for Network Telecommunications Equipment. -
Page 3: Figure 4. Circuit Card Pin Assignments
TRDDS loop at 13.3 kHz (135 termination), the Nyquist frequency of TRDDS. The signal meter on the TRDDS-R may be used to verify that the loop loss is actually within TRDDS deployment guidelines without the requirement of peripheral test equipment. -
Page 4: Testing
See Table 4 for an interoperability matrix of loopback responses supported by the TRDDS-R. The TRDDS-R always provides an NIE latching loopback at all rates. See Table 5 and 6 for latching and alternating loopback sequences. The TRDDS-R supports testing of the two-wire loop from the remote end when the CO unit is performing a bidirectional loopback. -
Page 5: Table 5. Latching Loopback Sequences
• From a test system or set, send a CSU latching loopback sequence. This instructs the TRDDS- DP to notify the TRDDS-R of a CSU loopback request. The TRDDS-R will reverse sealing current to the DSU/CSU. The DSU/CSU should loop when reversed sealing current is detected. -
Page 6: Deployment Guidelines
TRDDS-R to pass-thru mode. Once the bidirectional loopback is executed in normal mode, unseat and reseat the TRDDS-R and allow the unit to train-up. Once trained, the TRDDS-R will revert to pass-thru mode for further testing. Refer to Figure 7 for TRDDS operation during bidirectional loopback in normal mode. -
Page 7: Warranty And Customer Service
Table 9. TRDDS Insertion Loss Measurements 61291021L5-5A 6. WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within 10 years from the date of shipment if it does not meet its published specifications or fails while in service (see...