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61291021L5-5A
Section 61291021L5-5A, Issue 1
Features
• Two-wire deployment
• Repeaterless operation
• Bridged tap tolerant
• Span-powered
• Auto-rate adaption on subrates, 19.2 and 56 kbps
rates, including secondary channel, and 64 kbps
clear channel capability
• LED indicators for Power, SYNC, NEAR/FAR
CRC, Service Rate, and Loopback
• T200 mechanics
• Signal-level indication during synchronization
• Automatic data pass-thru upon detection of
bidirectional central Office (CO) loopback at
power-up
• 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.
2. OPTIONS
Rate is automatically configured from the Total Reach
dataport unit. Options are selected using the SW1 switch
as illustrated in Figure 3.
When 0 dB (SW1-1) is selected, the unit will transmit a 0
dB AMI signal across the four-wire interface toward the
customer DSU/CSU. When -10 dB is selected, the unit
will transmit a -10 dB AMI signal toward the DSU/CSU.
Figure 2. Total Reach DDS Circuit Diagram
T-Carrier
Channel Bank
2-Wire Loop
4-Wire Customer
Interface
DSU/CSU
TRDDS-R
TR
OCU
DP
T/R Pair
Customer Premises
or Outside Plant
Up to
18 kft or -45 dB
Figure 3. TRDDS-R Option Switch
O
N
1
0dB
-10dB
SW1
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
3. INSTALLATION
After unpacking the unit, immediately inspect it for
possible shipping damage. If damage is discovered,
file a claim immediately with the carrier, and then
contact ADTRAN Customer and Product Service
(CAPS).
See Section 6, Warranty and Customer
Service.
CAUTION
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.
Total Reach dataports normally provide -130
V of span-powering voltage to the TRDDS-R.
Wiring
For indoor applications, the TRDDS-R can be housed
in a standard T400/T200 shelf or the ADTRAN T400/
T200 Single Mount Housing, part number 1212007L1.
The ADTRAN T400/T200 single environmental
housing, part number 1150087L1, is recommended for
outside plant applications. Connections are made using
screwdown terminals on the barrier strip located on the
housing. Frame ground is presented on pins 1, 11, 17,
and 27 to accommodate various T400/T200
mountings. Figure 4 describes the circuit card pinout
and Table 1 shows the wiring connections for the
TRDDS-R for both inside and outside mounting
applications.
