1
61291006L2-5B
Section 61291006L2, Issue 2
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN D4 Total Reach Office
Channel Unit Dataport (TROCU DP) Preferred
Option. The unit is illustrated in Figure 1.
Document Revision History
Issue 2 of this document revises the Deployment
Guidelines subsection.
Description
ADTRAN D4 TROCU DP Preferred Option is a
functional replacement for the D4 OCU DP,
delivering data at rates up to 64 kbps on a single
copper pair. Used in combination with the Total
Reach Digital Data Service Remote termination unit
(TRDDS-R), the TROCU DP can accommodate
extended loop lengths eliminating the need for DDS
repeaters. The TROCU DP span powers the remote
TRDDS-R located at the customer premise. The
TRDDS-R converts the two-wire signal to the
Model TROCU DP Preferred Option
Total Reach
®
All-Rate DDS Dataport
Installation and Maintenance
Section 61291006L2-5
Issue 2, June 1999
CLEI Code #D4D3MPY_ _ _
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
traditional four-wire Alternate Mark Inversion (AMI)
signal for presentation to the customer.
The TROCU DP occupies a single channel position in
the WECO
®
compatible D4 channel bank or the
AT&T
®
SLC-96 Mode I and III terminal. It provides
the interface between a DS0 timeslot of the T-carrier
data stream, and the two-wire metallic loop extending
to the customer premises.
The TROCU DP may interoperate over the carrier
system with another TROCU DP, an OCU DP, a DS0
DP, a 1/0 DCS, or the central office switch. The unit
can be located in an end office, hub office,
intermediate office, or remote terminal digital carrier
system (see Figure 2). The two-wire loop is
connected using the tip (pin 24) and ring (pin 51) on
the D4 backplane.
Figure 1. TROCU DP Preferred Option
T-Carrier
D4 or SLC-96
2-Wire Loop
4-Wire Customer
Interface
DSU/CSU
TRDDS-R
TR
OCU
DP
T/R Pair
Customer Premises
Figure 2. Total Reach DDS Circuit Diagram
SYNC
NEAR
FAR
REM
QM
NO
LBK
IDLE
Rx
Tx
SC
64
56
19.2
9.6
4.8
2.4
SW56
TROCU DP
1291006L2
SD4 2-WIRE
LOSS
CRC
CRC
DISC
DSU
(OUT)
(IN)
AP
L
O
G
I
C
SW1
CONTENTS
1. GENERAL ..................................................................... 1
2. OPTIONS ...................................................................... 2
3. INSTALLATION ........................................................... 3
4. TESTING ....................................................................... 3
5. REMOTE PROVISIONING AND
DIAGNOSTICS ............................................................. 4
6. DEPLOYMENT GUIDELINES .................................... 5
7. WARRANTY AND CUSTOMER SERVICE ............... 6
FIGURES
Figure 1. TROCU DP Preferred Option ............................. 1
Figure 2. Total Reach DDS Circuit Diagram ..................... 1
Figure 3. Option Switch ..................................................... 2
Figure 4. Rate Selection ..................................................... 2
Figure 5. OCU Loopback at the TROCU DP ..................... 4
Figure 6. TROCU DP Bidirectional Loopback
Pass-Thru Mode ................................................. 4
Figure 7. TROCU DP Bidirectional Loopback
Normal Mode ..................................................... 4
TABLES
Table 1. Preprovisioning ..................................................... 3
Table 2. Cable Type Loss Data @ 13.3 kHz ....................... 3
Table 3. LED Indicators ..................................................... 5
Table 4. TRDDS Insertion Loss Measurements ................. 5
